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| author | Dan Williams <dan.j.williams@intel.com> | 2011-09-20 15:10:33 -0700 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2011-10-02 12:30:30 -0500 |
| commit | f6e67035a9edd79b8b202c159d5bec560bb9c358 (patch) | |
| tree | ba884b5a2de7cb60bd1e6f67813b47fdb8ff509a /drivers/ata/libata-scsi.c | |
| parent | 2fc62e2ac350b8f574e0a09170b350a8f2fa4a02 (diff) | |
| download | linux-f6e67035a9edd79b8b202c159d5bec560bb9c358.tar.gz linux-f6e67035a9edd79b8b202c159d5bec560bb9c358.tar.bz2 linux-f6e67035a9edd79b8b202c159d5bec560bb9c358.zip | |
[SCSI] libsas,libata: fix ->change_queue_{depth|type} for sata devices
Pass queue_depth change requests to libata, and prevent queue_type
changes for ATA devices.
Otherwise:
1/ we do not honor the libata specific restrictions on the queue depth
2/ libsas drivers that do not set sdev->tagged_supported are unable to
change the queue_depth of ata devices via sysfs
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/ata/libata-scsi.c')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 46d087f08607..19ba77032ac2 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1215,25 +1215,15 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev) } /** - * ata_scsi_change_queue_depth - SCSI callback for queue depth config - * @sdev: SCSI device to configure queue depth for - * @queue_depth: new queue depth - * @reason: calling context - * - * This is libata standard hostt->change_queue_depth callback. - * SCSI will call into this callback when user tries to set queue - * depth via sysfs. + * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth * - * LOCKING: - * SCSI layer (we don't care) + * libsas and libata have different approaches for associating a sdev to + * its ata_port. * - * RETURNS: - * Newly configured queue depth. */ -int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth, - int reason) +int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, + int queue_depth, int reason) { - struct ata_port *ap = ata_shost_to_port(sdev->host); struct ata_device *dev; unsigned long flags; @@ -1269,6 +1259,30 @@ int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth, } /** + * ata_scsi_change_queue_depth - SCSI callback for queue depth config + * @sdev: SCSI device to configure queue depth for + * @queue_depth: new queue depth + * @reason: calling context + * + * This is libata standard hostt->change_queue_depth callback. + * SCSI will call into this callback when user tries to set queue + * depth via sysfs. + * + * LOCKING: + * SCSI layer (we don't care) + * + * RETURNS: + * Newly configured queue depth. + */ +int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth, + int reason) +{ + struct ata_port *ap = ata_shost_to_port(sdev->host); + + return __ata_change_queue_depth(ap, sdev, queue_depth, reason); +} + +/** * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command * @qc: Storage for translated ATA taskfile * |