[PATCH] HVCS char driver janitoring: move block of code
Move a block of code from the bottom of the file to the top, which is needed to enable the cleanup. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: Ryan S. Arnold <rsa@us.ibm.com> Cc: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Linas Vepstas
Linus Torvalds
Родитель
940cc2df93
Коммит
c15bb29640
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@ -337,11 +337,6 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp);
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static void hvcs_close(struct tty_struct *tty, struct file *filp);
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static void hvcs_hangup(struct tty_struct * tty);
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static void hvcs_create_device_attrs(struct hvcs_struct *hvcsd);
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static void hvcs_remove_device_attrs(struct vio_dev *vdev);
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static void hvcs_create_driver_attrs(void);
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static void hvcs_remove_driver_attrs(void);
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static int __devinit hvcs_probe(struct vio_dev *dev,
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const struct vio_device_id *id);
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static int __devexit hvcs_remove(struct vio_dev *dev);
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@ -353,6 +348,172 @@ static void __exit hvcs_module_exit(void);
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#define HVCS_TRY_WRITE 0x00000004
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#define HVCS_READ_MASK (HVCS_SCHED_READ | HVCS_QUICK_READ)
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static inline struct hvcs_struct *from_vio_dev(struct vio_dev *viod)
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{
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return viod->dev.driver_data;
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}
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/* The sysfs interface for the driver and devices */
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static ssize_t hvcs_partner_vtys_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct vio_dev *viod = to_vio_dev(dev);
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struct hvcs_struct *hvcsd = from_vio_dev(viod);
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unsigned long flags;
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int retval;
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spin_lock_irqsave(&hvcsd->lock, flags);
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retval = sprintf(buf, "%X\n", hvcsd->p_unit_address);
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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return retval;
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}
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static DEVICE_ATTR(partner_vtys, S_IRUGO, hvcs_partner_vtys_show, NULL);
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static ssize_t hvcs_partner_clcs_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct vio_dev *viod = to_vio_dev(dev);
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struct hvcs_struct *hvcsd = from_vio_dev(viod);
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unsigned long flags;
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int retval;
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spin_lock_irqsave(&hvcsd->lock, flags);
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retval = sprintf(buf, "%s\n", &hvcsd->p_location_code[0]);
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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return retval;
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}
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static DEVICE_ATTR(partner_clcs, S_IRUGO, hvcs_partner_clcs_show, NULL);
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static ssize_t hvcs_current_vty_store(struct device *dev, struct device_attribute *attr, const char * buf,
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size_t count)
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{
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/*
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* Don't need this feature at the present time because firmware doesn't
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* yet support multiple partners.
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*/
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printk(KERN_INFO "HVCS: Denied current_vty change: -EPERM.\n");
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return -EPERM;
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}
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static ssize_t hvcs_current_vty_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct vio_dev *viod = to_vio_dev(dev);
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struct hvcs_struct *hvcsd = from_vio_dev(viod);
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unsigned long flags;
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int retval;
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spin_lock_irqsave(&hvcsd->lock, flags);
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retval = sprintf(buf, "%s\n", &hvcsd->p_location_code[0]);
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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return retval;
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}
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static DEVICE_ATTR(current_vty,
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S_IRUGO | S_IWUSR, hvcs_current_vty_show, hvcs_current_vty_store);
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static ssize_t hvcs_vterm_state_store(struct device *dev, struct device_attribute *attr, const char *buf,
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size_t count)
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{
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struct vio_dev *viod = to_vio_dev(dev);
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struct hvcs_struct *hvcsd = from_vio_dev(viod);
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unsigned long flags;
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/* writing a '0' to this sysfs entry will result in the disconnect. */
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if (simple_strtol(buf, NULL, 0) != 0)
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return -EINVAL;
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spin_lock_irqsave(&hvcsd->lock, flags);
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if (hvcsd->open_count > 0) {
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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printk(KERN_INFO "HVCS: vterm state unchanged. "
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"The hvcs device node is still in use.\n");
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return -EPERM;
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}
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if (hvcsd->connected == 0) {
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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printk(KERN_INFO "HVCS: vterm state unchanged. The"
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" vty-server is not connected to a vty.\n");
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return -EPERM;
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}
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hvcs_partner_free(hvcsd);
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printk(KERN_INFO "HVCS: Closed vty-server@%X and"
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" partner vty@%X:%d connection.\n",
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hvcsd->vdev->unit_address,
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hvcsd->p_unit_address,
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(uint32_t)hvcsd->p_partition_ID);
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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return count;
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}
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static ssize_t hvcs_vterm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct vio_dev *viod = to_vio_dev(dev);
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struct hvcs_struct *hvcsd = from_vio_dev(viod);
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unsigned long flags;
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int retval;
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spin_lock_irqsave(&hvcsd->lock, flags);
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retval = sprintf(buf, "%d\n", hvcsd->connected);
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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return retval;
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}
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static DEVICE_ATTR(vterm_state, S_IRUGO | S_IWUSR,
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hvcs_vterm_state_show, hvcs_vterm_state_store);
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static ssize_t hvcs_index_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct vio_dev *viod = to_vio_dev(dev);
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struct hvcs_struct *hvcsd = from_vio_dev(viod);
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unsigned long flags;
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int retval;
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spin_lock_irqsave(&hvcsd->lock, flags);
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retval = sprintf(buf, "%d\n", hvcsd->index);
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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return retval;
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}
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static DEVICE_ATTR(index, S_IRUGO, hvcs_index_show, NULL);
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static struct attribute *hvcs_attrs[] = {
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&dev_attr_partner_vtys.attr,
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&dev_attr_partner_clcs.attr,
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&dev_attr_current_vty.attr,
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&dev_attr_vterm_state.attr,
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&dev_attr_index.attr,
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NULL,
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};
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static struct attribute_group hvcs_attr_group = {
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.attrs = hvcs_attrs,
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};
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static ssize_t hvcs_rescan_show(struct device_driver *ddp, char *buf)
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{
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/* A 1 means it is updating, a 0 means it is done updating */
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return snprintf(buf, PAGE_SIZE, "%d\n", hvcs_rescan_status);
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}
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static ssize_t hvcs_rescan_store(struct device_driver *ddp, const char * buf,
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size_t count)
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{
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if ((simple_strtol(buf, NULL, 0) != 1)
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&& (hvcs_rescan_status != 0))
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return -EINVAL;
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hvcs_rescan_status = 1;
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printk(KERN_INFO "HVCS: rescanning partner info for all"
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" vty-servers.\n");
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hvcs_rescan_devices_list();
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hvcs_rescan_status = 0;
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return count;
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}
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static DRIVER_ATTR(rescan,
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S_IRUGO | S_IWUSR, hvcs_rescan_show, hvcs_rescan_store);
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static void hvcs_kick(void)
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{
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hvcs_kicked = 1;
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@ -575,7 +736,7 @@ static void destroy_hvcs_struct(struct kobject *kobj)
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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spin_unlock(&hvcs_structs_lock);
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hvcs_remove_device_attrs(vdev);
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sysfs_remove_group(&vdev->dev.kobj, &hvcs_attr_group);
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kfree(hvcsd);
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}
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@ -608,6 +769,7 @@ static int __devinit hvcs_probe(
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{
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struct hvcs_struct *hvcsd;
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int index;
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int retval;
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if (!dev || !id) {
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printk(KERN_ERR "HVCS: probed with invalid parameter.\n");
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@ -658,14 +820,16 @@ static int __devinit hvcs_probe(
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* the hvcs_struct has been added to the devices list then the user app
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* will get -ENODEV.
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*/
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spin_lock(&hvcs_structs_lock);
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list_add_tail(&(hvcsd->next), &hvcs_structs);
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spin_unlock(&hvcs_structs_lock);
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hvcs_create_device_attrs(hvcsd);
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retval = sysfs_create_group(&dev->dev.kobj, &hvcs_attr_group);
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if (retval) {
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printk(KERN_ERR "HVCS: Can't create sysfs attrs for vty-server@%X\n",
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hvcsd->vdev->unit_address);
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return retval;
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}
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printk(KERN_INFO "HVCS: vty-server@%X added to the vio bus.\n", dev->unit_address);
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@ -1354,8 +1518,10 @@ static int __init hvcs_module_init(void)
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if (!hvcs_tty_driver)
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return -ENOMEM;
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if (hvcs_alloc_index_list(num_ttys_to_alloc))
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return -ENOMEM;
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if (hvcs_alloc_index_list(num_ttys_to_alloc)) {
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rc = -ENOMEM;
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goto index_fail;
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}
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hvcs_tty_driver->owner = THIS_MODULE;
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@ -1385,41 +1551,57 @@ static int __init hvcs_module_init(void)
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* dynamically assigned major and minor numbers for our devices.
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*/
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if (tty_register_driver(hvcs_tty_driver)) {
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printk(KERN_ERR "HVCS: registration "
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" as a tty driver failed.\n");
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hvcs_free_index_list();
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put_tty_driver(hvcs_tty_driver);
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return -EIO;
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printk(KERN_ERR "HVCS: registration as a tty driver failed.\n");
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rc = -EIO;
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goto register_fail;
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}
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hvcs_pi_buff = kmalloc(PAGE_SIZE, GFP_KERNEL);
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if (!hvcs_pi_buff) {
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tty_unregister_driver(hvcs_tty_driver);
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hvcs_free_index_list();
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put_tty_driver(hvcs_tty_driver);
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return -ENOMEM;
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rc = -ENOMEM;
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goto buff_alloc_fail;
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}
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hvcs_task = kthread_run(khvcsd, NULL, "khvcsd");
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if (IS_ERR(hvcs_task)) {
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printk(KERN_ERR "HVCS: khvcsd creation failed. Driver not loaded.\n");
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kfree(hvcs_pi_buff);
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tty_unregister_driver(hvcs_tty_driver);
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hvcs_free_index_list();
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put_tty_driver(hvcs_tty_driver);
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return -EIO;
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rc = -EIO;
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goto kthread_fail;
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}
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rc = vio_register_driver(&hvcs_vio_driver);
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if (rc) {
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printk(KERN_ERR "HVCS: can't register vio driver\n");
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goto vio_fail;
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}
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/*
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* This needs to be done AFTER the vio_register_driver() call or else
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* the kobjects won't be initialized properly.
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*/
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hvcs_create_driver_attrs();
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rc = driver_create_file(&(hvcs_vio_driver.driver), &driver_attr_rescan);
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if (rc) {
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printk(KERN_ERR "HVCS: sysfs attr create failed\n");
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goto attr_fail;
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}
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printk(KERN_INFO "HVCS: driver module inserted.\n");
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return 0;
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attr_fail:
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vio_unregister_driver(&hvcs_vio_driver);
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vio_fail:
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kthread_stop(hvcs_task);
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kthread_fail:
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kfree(hvcs_pi_buff);
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buff_alloc_fail:
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tty_unregister_driver(hvcs_tty_driver);
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register_fail:
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hvcs_free_index_list();
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index_fail:
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put_tty_driver(hvcs_tty_driver);
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hvcs_tty_driver = NULL;
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return rc;
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}
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@ -1441,7 +1623,7 @@ static void __exit hvcs_module_exit(void)
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hvcs_pi_buff = NULL;
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spin_unlock(&hvcs_pi_lock);
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hvcs_remove_driver_attrs();
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driver_remove_file(&hvcs_vio_driver.driver, &driver_attr_rescan);
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vio_unregister_driver(&hvcs_vio_driver);
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@ -1456,191 +1638,3 @@ static void __exit hvcs_module_exit(void)
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module_init(hvcs_module_init);
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module_exit(hvcs_module_exit);
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static inline struct hvcs_struct *from_vio_dev(struct vio_dev *viod)
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{
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return viod->dev.driver_data;
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}
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/* The sysfs interface for the driver and devices */
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static ssize_t hvcs_partner_vtys_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct vio_dev *viod = to_vio_dev(dev);
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struct hvcs_struct *hvcsd = from_vio_dev(viod);
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unsigned long flags;
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int retval;
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spin_lock_irqsave(&hvcsd->lock, flags);
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retval = sprintf(buf, "%X\n", hvcsd->p_unit_address);
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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return retval;
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}
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static DEVICE_ATTR(partner_vtys, S_IRUGO, hvcs_partner_vtys_show, NULL);
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static ssize_t hvcs_partner_clcs_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct vio_dev *viod = to_vio_dev(dev);
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struct hvcs_struct *hvcsd = from_vio_dev(viod);
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unsigned long flags;
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int retval;
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spin_lock_irqsave(&hvcsd->lock, flags);
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retval = sprintf(buf, "%s\n", &hvcsd->p_location_code[0]);
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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return retval;
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}
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static DEVICE_ATTR(partner_clcs, S_IRUGO, hvcs_partner_clcs_show, NULL);
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static ssize_t hvcs_current_vty_store(struct device *dev, struct device_attribute *attr, const char * buf,
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size_t count)
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{
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/*
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* Don't need this feature at the present time because firmware doesn't
|
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* yet support multiple partners.
|
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*/
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printk(KERN_INFO "HVCS: Denied current_vty change: -EPERM.\n");
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return -EPERM;
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}
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static ssize_t hvcs_current_vty_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct vio_dev *viod = to_vio_dev(dev);
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struct hvcs_struct *hvcsd = from_vio_dev(viod);
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unsigned long flags;
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int retval;
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spin_lock_irqsave(&hvcsd->lock, flags);
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retval = sprintf(buf, "%s\n", &hvcsd->p_location_code[0]);
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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return retval;
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}
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static DEVICE_ATTR(current_vty,
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S_IRUGO | S_IWUSR, hvcs_current_vty_show, hvcs_current_vty_store);
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static ssize_t hvcs_vterm_state_store(struct device *dev, struct device_attribute *attr, const char *buf,
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size_t count)
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{
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struct vio_dev *viod = to_vio_dev(dev);
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struct hvcs_struct *hvcsd = from_vio_dev(viod);
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unsigned long flags;
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/* writing a '0' to this sysfs entry will result in the disconnect. */
|
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if (simple_strtol(buf, NULL, 0) != 0)
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return -EINVAL;
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spin_lock_irqsave(&hvcsd->lock, flags);
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if (hvcsd->open_count > 0) {
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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printk(KERN_INFO "HVCS: vterm state unchanged. "
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"The hvcs device node is still in use.\n");
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return -EPERM;
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}
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|
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if (hvcsd->connected == 0) {
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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printk(KERN_INFO "HVCS: vterm state unchanged. The"
|
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" vty-server is not connected to a vty.\n");
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return -EPERM;
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}
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hvcs_partner_free(hvcsd);
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printk(KERN_INFO "HVCS: Closed vty-server@%X and"
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" partner vty@%X:%d connection.\n",
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hvcsd->vdev->unit_address,
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hvcsd->p_unit_address,
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(uint32_t)hvcsd->p_partition_ID);
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spin_unlock_irqrestore(&hvcsd->lock, flags);
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return count;
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}
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|
||||
static ssize_t hvcs_vterm_state_show(struct device *dev, struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct vio_dev *viod = to_vio_dev(dev);
|
||||
struct hvcs_struct *hvcsd = from_vio_dev(viod);
|
||||
unsigned long flags;
|
||||
int retval;
|
||||
|
||||
spin_lock_irqsave(&hvcsd->lock, flags);
|
||||
retval = sprintf(buf, "%d\n", hvcsd->connected);
|
||||
spin_unlock_irqrestore(&hvcsd->lock, flags);
|
||||
return retval;
|
||||
}
|
||||
static DEVICE_ATTR(vterm_state, S_IRUGO | S_IWUSR,
|
||||
hvcs_vterm_state_show, hvcs_vterm_state_store);
|
||||
|
||||
static ssize_t hvcs_index_show(struct device *dev, struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct vio_dev *viod = to_vio_dev(dev);
|
||||
struct hvcs_struct *hvcsd = from_vio_dev(viod);
|
||||
unsigned long flags;
|
||||
int retval;
|
||||
|
||||
spin_lock_irqsave(&hvcsd->lock, flags);
|
||||
retval = sprintf(buf, "%d\n", hvcsd->index);
|
||||
spin_unlock_irqrestore(&hvcsd->lock, flags);
|
||||
return retval;
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(index, S_IRUGO, hvcs_index_show, NULL);
|
||||
|
||||
static struct attribute *hvcs_attrs[] = {
|
||||
&dev_attr_partner_vtys.attr,
|
||||
&dev_attr_partner_clcs.attr,
|
||||
&dev_attr_current_vty.attr,
|
||||
&dev_attr_vterm_state.attr,
|
||||
&dev_attr_index.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static struct attribute_group hvcs_attr_group = {
|
||||
.attrs = hvcs_attrs,
|
||||
};
|
||||
|
||||
static void hvcs_create_device_attrs(struct hvcs_struct *hvcsd)
|
||||
{
|
||||
struct vio_dev *vdev = hvcsd->vdev;
|
||||
sysfs_create_group(&vdev->dev.kobj, &hvcs_attr_group);
|
||||
}
|
||||
|
||||
static void hvcs_remove_device_attrs(struct vio_dev *vdev)
|
||||
{
|
||||
sysfs_remove_group(&vdev->dev.kobj, &hvcs_attr_group);
|
||||
}
|
||||
|
||||
static ssize_t hvcs_rescan_show(struct device_driver *ddp, char *buf)
|
||||
{
|
||||
/* A 1 means it is updating, a 0 means it is done updating */
|
||||
return snprintf(buf, PAGE_SIZE, "%d\n", hvcs_rescan_status);
|
||||
}
|
||||
|
||||
static ssize_t hvcs_rescan_store(struct device_driver *ddp, const char * buf,
|
||||
size_t count)
|
||||
{
|
||||
if ((simple_strtol(buf, NULL, 0) != 1)
|
||||
&& (hvcs_rescan_status != 0))
|
||||
return -EINVAL;
|
||||
|
||||
hvcs_rescan_status = 1;
|
||||
printk(KERN_INFO "HVCS: rescanning partner info for all"
|
||||
" vty-servers.\n");
|
||||
hvcs_rescan_devices_list();
|
||||
hvcs_rescan_status = 0;
|
||||
return count;
|
||||
}
|
||||
static DRIVER_ATTR(rescan,
|
||||
S_IRUGO | S_IWUSR, hvcs_rescan_show, hvcs_rescan_store);
|
||||
|
||||
static void hvcs_create_driver_attrs(void)
|
||||
{
|
||||
struct device_driver *driverfs = &(hvcs_vio_driver.driver);
|
||||
driver_create_file(driverfs, &driver_attr_rescan);
|
||||
}
|
||||
|
||||
static void hvcs_remove_driver_attrs(void)
|
||||
{
|
||||
struct device_driver *driverfs = &(hvcs_vio_driver.driver);
|
||||
driver_remove_file(driverfs, &driver_attr_rescan);
|
||||
}
|
||||
|
|
|
|||
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