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| author | Mike Christie <michaelc@cs.wisc.edu> | 2010-04-24 16:21:19 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-05-12 14:57:16 -0700 |
| commit | ec5e50f079ac7a22facdc1f535a755dab30a0af5 (patch) | |
| tree | 7d32514b5f3845b696cbfdb49e31f04b6f8b4833 | |
| parent | a414b72407d6729915dc1af4c21f1c40d328d7da (diff) | |
| download | lwn-ec5e50f079ac7a22facdc1f535a755dab30a0af5.tar.gz lwn-ec5e50f079ac7a22facdc1f535a755dab30a0af5.zip | |
SCSI: libiscsi: regression: fix header digest errors
commit 96b1f96dcab87756c0a1e7ba76bc5dc2add82b88 upstream.
This fixes a regression introduced with this commit:
commit d3305f3407fa3e9452079ec6cc8379067456e4aa
Author: Mike Christie <michaelc@cs.wisc.edu>
Date: Thu Aug 20 15:10:58 2009 -0500
[SCSI] libiscsi: don't increment cmdsn if cmd is not sent
in 2.6.32.
When I moved the hdr->cmdsn after init_task, I added
a bug when header digests are used. The problem is
that the LLD may calculate the header digest in init_task,
so if we then set the cmdsn after the init_task call we
change what the digest will be calculated by the target.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/scsi/libiscsi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index c7a6a894aee0..aab4a39cf84d 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -384,12 +384,12 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task) WARN_ON(hdrlength >= 256); hdr->hlength = hdrlength & 0xFF; + hdr->cmdsn = task->cmdsn = cpu_to_be32(session->cmdsn); if (session->tt->init_task && session->tt->init_task(task)) return -EIO; task->state = ISCSI_TASK_RUNNING; - hdr->cmdsn = task->cmdsn = cpu_to_be32(session->cmdsn); session->cmdsn++; conn->scsicmd_pdus_cnt++; |