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authorMartin K. Petersen <martin.petersen@oracle.com>2010-01-20 07:20:43 (GMT)
committerJames Bottomley <James.Bottomley@suse.de>2010-02-19 17:15:33 (GMT)
commit77c9cfc51b0d732b2524799810fb30018074fd60 (patch)
tree3f017828710e8bab9e172204a2ef5f2e9544d379 /drivers/scsi
parent8475f688d796b875bf98ed161acd53d00a1483ff (diff)
downloadlinux-77c9cfc51b0d732b2524799810fb30018074fd60.tar.xz
[SCSI] Fix printing of failed 32-byte commands
Having the large CDB allocation logic in sd.c means that scsi_io_completion does not have access to the command buffer. That in turn causes garbage to be printed when a 32-byte command fails. Move the command printing to sd_done where the command buffer is intact. Clear the command buffer pointer after the extended CDB has been freed. Make scsi_print_command ignore commands with NULL CDB pointers to inhibit printing of garbled command strings. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/constants.c3
-rw-r--r--drivers/scsi/sd.c13
2 files changed, 15 insertions, 1 deletions
diff --git a/drivers/scsi/constants.c b/drivers/scsi/constants.c
index 7092ff6..cd05e04 100644
--- a/drivers/scsi/constants.c
+++ b/drivers/scsi/constants.c
@@ -346,6 +346,9 @@ void scsi_print_command(struct scsi_cmnd *cmd)
{
int k;
+ if (cmd->cmnd == NULL)
+ return;
+
scmd_printk(KERN_INFO, cmd, "CDB: ");
print_opcode_name(cmd->cmnd, cmd->cmd_len);
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 908d400..1dd4d84 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1209,8 +1209,19 @@ static int sd_done(struct scsi_cmnd *SCpnt)
sd_dif_complete(SCpnt, good_bytes);
if (scsi_host_dif_capable(sdkp->device->host, sdkp->protection_type)
- == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd)
+ == SD_DIF_TYPE2_PROTECTION && SCpnt->cmnd != SCpnt->request->cmd) {
+
+ /* We have to print a failed command here as the
+ * extended CDB gets freed before scsi_io_completion()
+ * is called.
+ */
+ if (result)
+ scsi_print_command(SCpnt);
+
mempool_free(SCpnt->cmnd, sd_cdb_pool);
+ SCpnt->cmnd = NULL;
+ SCpnt->cmd_len = 0;
+ }
return good_bytes;
}