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authorJohn Garry <john.garry@huawei.com>2021-05-19 17:31:02 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2021-05-22 07:34:39 +0300
commitea2f0f77538c50739b9fb4de4700cee5535e1f77 (patch)
treed00ad2fbb7d601043caf5549810d13a74294e555 /drivers/cxl/Kconfig
parente5e0280db792953ee7acbdbf01179d53187a6083 (diff)
downloadlinux-ea2f0f77538c50739b9fb4de4700cee5535e1f77.tar.xz
scsi: core: Cap scsi_host cmd_per_lun at can_queue
The sysfs handling function sdev_store_queue_depth() enforces that the sdev queue depth cannot exceed shost can_queue. The initial sdev queue depth comes from shost cmd_per_lun. However, the LLDD may manually set cmd_per_lun to be larger than can_queue, which leads to an initial sdev queue depth greater than can_queue. Such an issue was reported in [0], which caused a hang. That has since been fixed in commit fc09acb7de31 ("scsi: scsi_debug: Fix cmd_per_lun, set to max_queue"). Stop this possibly happening for other drivers by capping shost cmd_per_lun at shost can_queue. [0] https://lore.kernel.org/linux-scsi/YHaez6iN2HHYxYOh@T590/ Link: https://lore.kernel.org/r/1621434662-173079-1-git-send-email-john.garry@huawei.com Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/cxl/Kconfig')
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