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| author | Hannes Reinecke <hare@suse.de> | 2014-10-24 14:27:04 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-11-12 11:16:07 +0100 |
| commit | 883a030f989a17b81167f3a181cf93d741fa98b4 (patch) | |
| tree | 1d2ddbd855800bf1d17e38e5020a7f4128b6c5ec /drivers | |
| parent | a3a790dcb2f4dc1d8ebcaa4bf87773b9c6a13174 (diff) | |
| download | linux-883a030f989a17b81167f3a181cf93d741fa98b4.tar.gz linux-883a030f989a17b81167f3a181cf93d741fa98b4.tar.bz2 linux-883a030f989a17b81167f3a181cf93d741fa98b4.zip | |
scsi: document scsi_try_to_abort_cmd
scsi_try_to_abort_cmd() should only return SUCCESS, FAILED, or
FAST_IO_FAIL. So document that in the function description and simplify
the logging message.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/scsi_error.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 44e2576878a3..95c9abb64183 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -157,8 +157,9 @@ scmd_eh_abort_handler(struct work_struct *work) } else { SCSI_LOG_ERROR_RECOVERY(3, scmd_printk(KERN_INFO, scmd, - "scmd %p abort failed, rtn %d\n", - scmd, rtn)); + "scmd %p abort %s\n", scmd, + (rtn == FAST_IO_FAIL) ? + "not send" : "failed")); } } @@ -869,7 +870,24 @@ static int scsi_try_bus_device_reset(struct scsi_cmnd *scmd) return rtn; } -static int scsi_try_to_abort_cmd(struct scsi_host_template *hostt, struct scsi_cmnd *scmd) +/** + * scsi_try_to_abort_cmd - Ask host to abort a SCSI command + * @scmd: SCSI cmd used to send a target reset + * + * Return value: + * SUCCESS, FAILED, or FAST_IO_FAIL + * + * Notes: + * SUCCESS does not necessarily indicate that the command + * has been aborted; it only indicates that the LLDDs + * has cleared all references to that command. + * LLDDs should return FAILED only if an abort was required + * but could not be executed. LLDDs should return FAST_IO_FAIL + * if the device is temporarily unavailable (eg due to a + * link down on FibreChannel) + */ +static int scsi_try_to_abort_cmd(struct scsi_host_template *hostt, + struct scsi_cmnd *scmd) { if (!hostt->eh_abort_handler) return FAILED; |