ata: libata-sata: Fix device queue depth control

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The function __ata_change_queue_depth() uses the helper
ata_scsi_find_dev() to get the ata_device structure of a scsi device and
set that device maximum queue depth. However, when the ata device is
managed by libsas, ata_scsi_find_dev() returns NULL, turning
__ata_change_queue_depth() into a nop, which prevents the user from
setting the maximum queue depth of ATA devices used with libsas based
HBAs.

Fix this by renaming __ata_change_queue_depth() to
ata_change_queue_depth() and adding a pointer to the ata_device
structure of the target device as argument. This pointer is provided by
ata_scsi_change_queue_depth() using ata_scsi_find_dev() in the case of
a libata managed device and by sas_change_queue_depth() using
sas_to_ata_dev() in the case of a libsas managed ata device.

Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: John Garry <john.garry@huawei.com>

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This commit is contained in:

Damien Le Moal 2022-09-24 15:18:26 +09:00

parent 6a8438de52

commit 141f3d6256

3 changed files with 16 additions and 15 deletions

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24

drivers/ata/libata-sata.c

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3

drivers/scsi/libsas/sas_scsi_host.c

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4

include/linux/libata.h

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