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authorEwan D. Milne <emilne@redhat.com>2012-11-02 17:38:34 +0400
committerJames Bottomley <JBottomley@Parallels.com>2013-07-23 18:41:53 +0400
commit085b513f97d8d799d28491239be4b451bcd8c2c5 (patch)
tree1f7e0786f3e7ccf24cc8f77077540ebf7285fbd7 /drivers/scsi/mvsas
parentc3ccb1d7cf4c4549151876dd37c0944a682fd9e1 (diff)
downloadlinux-085b513f97d8d799d28491239be4b451bcd8c2c5.tar.xz
[SCSI] sd: fix crash when UA received on DIF enabled device
sd_prep_fn will allocate a larger CDB for the command via mempool_alloc for devices using DIF type 2 protection. This CDB was being freed in sd_done, which results in a kernel crash if the command is retried due to a UNIT ATTENTION. This change moves the code to free the larger CDB into sd_unprep_fn instead, which is invoked after the request is complete. It is no longer necessary to call scsi_print_command separately for this case as the ->cmnd will no longer be NULL in the normal code path. Also removed conditional test for DIF type 2 when freeing the larger CDB because the protection_type could have been changed via sysfs while the command was executing. Signed-off-by: Ewan D. Milne <emilne@redhat.com> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Cc: <stable@vger.kernel.org> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/mvsas')
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