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| author | Jason Yan <yanaijie@huawei.com> | 2017-12-11 15:03:33 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-12-11 21:45:34 -0500 |
| commit | 621f6401fdeefe96dfe9eab4b167c7c39f552bb0 (patch) | |
| tree | e15d20dd76d616136e55352e311f7f5bbb549363 /drivers/scsi/dpt | |
| parent | 48d83282db077f93b2cf40de120f4d6f29eb293b (diff) | |
| download | linux-621f6401fdeefe96dfe9eab4b167c7c39f552bb0.tar.gz | |
scsi: libsas: fix length error in sas_smp_handler()
The return value of smp_execute_task_sg() is the untransferred residual,
but bsg_job_done() requires the length of payload received. This makes
SMP passthrough commands from userland by sg ioctl to libsas get a wrong
response. The userland tools such as smp_utils failed because of these
wrong responses:
~#smp_discover /dev/bsg/expander-2\:13
response too short, len=0
~#smp_discover /dev/bsg/expander-2\:134
response too short, len=0
Fix this by passing the actual received length to bsg_job_done(). And if
smp_execute_task_sg() returns 0, this means received length is exactly
the buffer length.
[mkp: typo]
Fixes: 651a01364994 ("scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough")
Cc: <stable@vger.kernel.org> # v4.14+
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Reported-by: chenqilin <chenqilin2@huawei.com>
Tested-by: chenqilin <chenqilin2@huawei.com>
CC: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/dpt')
0 files changed, 0 insertions, 0 deletions