uio: Cleanup irq handling.
Change the value of UIO_IRQ_NONE -2 to 0. 0 is well defined in the rest of the kernel as the value to indicate an irq has not been assigned. Update the calls to request_irq and free_irq to only ignore UIO_IRQ_NONE and UIO_IRQ_CUSTOM allowing the rest of the kernel's possible irq numbers to be used. Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Hans J. Koch <hjk@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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70a9156bad
Коммит
6427a7655a
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@ -512,7 +512,7 @@ static unsigned int uio_poll(struct file *filep, poll_table *wait)
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struct uio_listener *listener = filep->private_data;
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struct uio_device *idev = listener->dev;
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if (idev->info->irq == UIO_IRQ_NONE)
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if (!idev->info->irq)
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return -EIO;
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poll_wait(filep, &idev->wait, wait);
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@ -530,7 +530,7 @@ static ssize_t uio_read(struct file *filep, char __user *buf,
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ssize_t retval;
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s32 event_count;
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if (idev->info->irq == UIO_IRQ_NONE)
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if (!idev->info->irq)
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return -EIO;
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if (count != sizeof(s32))
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@ -578,7 +578,7 @@ static ssize_t uio_write(struct file *filep, const char __user *buf,
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ssize_t retval;
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s32 irq_on;
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if (idev->info->irq == UIO_IRQ_NONE)
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if (!idev->info->irq)
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return -EIO;
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if (count != sizeof(s32))
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@ -825,9 +825,9 @@ int __uio_register_device(struct module *owner,
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info->uio_dev = idev;
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if (idev->info->irq >= 0) {
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ret = request_irq(idev->info->irq, uio_interrupt,
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idev->info->irq_flags, idev->info->name, idev);
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if (info->irq && (info->irq != UIO_IRQ_CUSTOM)) {
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ret = request_irq(info->irq, uio_interrupt,
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info->irq_flags, info->name, idev);
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if (ret)
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goto err_request_irq;
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}
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@ -863,7 +863,7 @@ void uio_unregister_device(struct uio_info *info)
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uio_free_minor(idev);
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if (info->irq >= 0)
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if (info->irq && (info->irq != UIO_IRQ_CUSTOM))
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free_irq(info->irq, idev);
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uio_dev_del_attributes(idev);
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@ -108,7 +108,7 @@ extern void uio_event_notify(struct uio_info *info);
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/* defines for uio_info->irq */
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#define UIO_IRQ_CUSTOM -1
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#define UIO_IRQ_NONE -2
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#define UIO_IRQ_NONE 0
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/* defines for uio_mem->memtype */
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#define UIO_MEM_NONE 0
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