After the patch that introduced this function was posted on the
linux-scsi mailing list an explanation was posted why this patch
is correct. Since that explanation contains important information,
add a summary of it above the code that explanation applies to.
See also http://www.spinics.net/lists/linux-scsi/msg106326.html.
References: e494f6a72839 ("[SCSI] improved eh timeout handler")
Signed-off-by: Bart Van Assche
Reviewed-by: Hannes Reinecke
Cc: Christoph Hellwig
Cc: Johannes Thumshirn
---
drivers/scsi/scsi_error.c | 6 ++
1 file changed, 6 insertions(+)
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index d042915ce895..96f988a7efda 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -117,6 +117,12 @@ static int scsi_host_eh_past_deadline(struct Scsi_Host
*shost)
/**
* scmd_eh_abort_handler - Handle command aborts
* @work: command to be aborted.
+ *
+ * Note: this function must be called only for a command that has timed out.
+ * Because the block layer marks a request as complete before it calls
+ * scsi_times_out(), a .scsi_done() call from the LLD for a command that has
+ * timed out do not have any effect. Hence it is safe to call
+ * scsi_finish_command() from this function.
*/
void
scmd_eh_abort_handler(struct work_struct *work)
--
2.16.1
