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| author | Tomas Henzl <thenzl@redhat.com> | 2013-08-01 15:14:00 +0200 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-12-14 16:24:01 +0000 |
| commit | e87cf8149d14c01a665e65029ad76530b228e901 (patch) | |
| tree | d52fc8c1cb60d9f7d2a7ac29a1fc9e28bf5bcb47 /drivers/scsi | |
| parent | 69cff65c8e35c2dc8763249e758ff55538809d27 (diff) | |
| download | kernel_samsung_smdk4412-e87cf8149d14c01a665e65029ad76530b228e901.zip kernel_samsung_smdk4412-e87cf8149d14c01a665e65029ad76530b228e901.tar.gz kernel_samsung_smdk4412-e87cf8149d14c01a665e65029ad76530b228e901.tar.bz2 | |
hpsa: fix a race in cmd_free/scsi_done
commit 2cc5bfaf854463d9d1aa52091f60110fbf102a96 upstream.
When the driver calls scsi_done and after that frees it's internal
preallocated memory it can happen that a new job is enqueud before
the memory is freed. The allocation fails and the message
"cmd_alloc returned NULL" is shown.
Patch below fixes it by moving cmd->scsi_done after cmd_free.
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Acked-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Masoud Sharbiani <msharbiani@twopensource.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/hpsa.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 603a2cb..64c8a80 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -1126,8 +1126,8 @@ static void complete_scsi_command(struct CommandList *cp) scsi_set_resid(cmd, ei->ResidualCnt); if (ei->CommandStatus == 0) { - cmd->scsi_done(cmd); cmd_free(h, cp); + cmd->scsi_done(cmd); return; } @@ -1300,8 +1300,8 @@ static void complete_scsi_command(struct CommandList *cp) dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n", cp, ei->CommandStatus); } - cmd->scsi_done(cmd); cmd_free(h, cp); + cmd->scsi_done(cmd); } static int hpsa_scsi_detect(struct ctlr_info *h) |