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[PATCH] libata: update ata_dev_init_params() 

Update ata_dev_init_params() such that it doesn't disable port
directly but return with appropriate error mask on failure.  This is
preparation for splitting ata_dev_identify().  Note that this patch
changes behavior of dev_init_params failure such that only failing
devices are taken offline not the whole port.  This change is
intended.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Tejun Heo 2006-02-15 18:24:09 +09:00 коммит произвёл Jeff Garzik
Родитель 6a62a04d47
Коммит 6aff8f1f07
1 изменённых файлов: 19 добавлений и 10 удалений
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29
drivers/scsi/libata-core.c
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@ -62,7 +62,8 @@
#include "libata.h"
static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev);
static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev);
static unsigned int ata_dev_init_params(struct ata_port *ap,
struct ata_device *dev);
static void ata_set_mode(struct ata_port *ap);
static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev);
static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift);
@ -1041,7 +1042,12 @@ retry:
* Some drives were very specific about that exact sequence.
*/
if (major_version < 4 || (!ata_id_has_lba(dev->id))) {
ata_dev_init_params(ap, dev);
err_mask = ata_dev_init_params(ap, dev);
if (err_mask) {
printk(KERN_ERR "ata%u: failed to init "
"parameters, disabled\n", ap->id);
goto err_out;
}
/* current CHS translation info (id[53-58]) might be
* changed. reread the identify device info.
@ -2530,17 +2536,23 @@ err_out:
* @dev: Device to which command will be sent
*
* LOCKING:
* Kernel thread context (may sleep)
*
* RETURNS:
* 0 on success, AC_ERR_* mask otherwise.
*/
static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev)
static unsigned int ata_dev_init_params(struct ata_port *ap,
struct ata_device *dev)
{
struct ata_taskfile tf;
unsigned int err_mask;
u16 sectors = dev->id[6];
u16 heads = dev->id[3];
/* Number of sectors per track 1-255. Number of heads 1-16 */
if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
return;
return 0;
/* set up init dev params taskfile */
DPRINTK("init dev params \n");
@ -2552,13 +2564,10 @@ static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev)
tf.nsect = sectors;
tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
if (ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0)) {
printk(KERN_ERR "ata%u: failed to init parameters, disabled\n",
ap->id);
ata_port_disable(ap);
}
err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
DPRINTK("EXIT\n");
DPRINTK("EXIT, err_mask=%x\n", err_mask);
return err_mask;
}
/**