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ata: libata-sata: Simplify ata_change_queue_depth() 

Commit 141f3d6256 ("ata: libata-sata: Fix device queue depth control")
added a struct ata_device argument to ata_change_queue_depth() to
address problems with changing the queue depth of ATA devices managed
through libsas. This was due to problems with ata_scsi_find_dev() which
are now fixed with commit 7f875850f2 ("ata: libata-scsi: Use correct
device no in ata_find_dev()").

Undo some of the changes of commit 141f3d6256e5: remove the added struct
ata_device aregument and use again ata_scsi_find_dev() to find the
target ATA device structure. While doing this, also make sure that
ata_scsi_find_dev() is called with ap->lock held, as it should.

libsas and libata call sites of ata_change_queue_depth() are updated to
match the modified function arguments.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
This commit is contained in:
Damien Le Moal 2023-05-30 16:29:24 +09:00
parent e4c26a1b74
commit 371b74c8ba
3 changed files with 13 additions and 13 deletions
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19
drivers/ata/libata-sata.c
View File

@ -1023,7 +1023,6 @@ EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
/**
* ata_change_queue_depth - Set a device maximum queue depth
* @ap: ATA port of the target device
* @dev: target ATA device
* @sdev: SCSI device to configure queue depth for
* @queue_depth: new queue depth
*
@ -1031,24 +1030,27 @@ EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
* and libata.
*
*/
int ata_change_queue_depth(struct ata_port *ap, struct ata_device *dev,
struct scsi_device *sdev, int queue_depth)
int ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
int queue_depth)
{
struct ata_device *dev;
unsigned long flags;
if (!dev || !ata_dev_enabled(dev))
return sdev->queue_depth;
spin_lock_irqsave(ap->lock, flags);
if (queue_depth < 1 || queue_depth == sdev->queue_depth)
dev = ata_scsi_find_dev(ap, sdev);
if (!dev || queue_depth < 1 || queue_depth == sdev->queue_depth) {
spin_unlock_irqrestore(ap->lock, flags);
return sdev->queue_depth;
}
/* NCQ enabled? */
spin_lock_irqsave(ap->lock, flags);
dev->flags &= ~ATA_DFLAG_NCQ_OFF;
if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
dev->flags |= ATA_DFLAG_NCQ_OFF;
queue_depth = 1;
}
spin_unlock_irqrestore(ap->lock, flags);
/* limit and apply queue depth */
@ -1082,8 +1084,7 @@ int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
{
struct ata_port *ap = ata_shost_to_port(sdev->host);
return ata_change_queue_depth(ap, ata_scsi_find_dev(ap, sdev),
sdev, queue_depth);
return ata_change_queue_depth(ap, sdev, queue_depth);
}
EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);

3
drivers/scsi/libsas/sas_scsi_host.c
View File

@ -872,8 +872,7 @@ int sas_change_queue_depth(struct scsi_device *sdev, int depth)
struct domain_device *dev = sdev_to_domain_dev(sdev);
if (dev_is_sata(dev))
return ata_change_queue_depth(dev->sata_dev.ap,
sas_to_ata_dev(dev), sdev, depth);
return ata_change_queue_depth(dev->sata_dev.ap, sdev, depth);
if (!sdev->tagged_supported)
depth = 1;

4
include/linux/libata.h
View File

@ -1144,8 +1144,8 @@ extern int ata_scsi_slave_config(struct scsi_device *sdev);
extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
int queue_depth);
extern int ata_change_queue_depth(struct ata_port *ap, struct ata_device *dev,
struct scsi_device *sdev, int queue_depth);
extern int ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
int queue_depth);
extern struct ata_device *ata_dev_pair(struct ata_device *adev);
extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);