On Thu, 2007-03-29 at 15:25 -0500, Brian King wrote:
> - int rtn;
> + int retry_cnt = 1, rtn;
>
> +retry_stu:
> rtn = scsi_send_eh_cmnd(scmd, stu_command, 6,
> START_UNIT_TIMEOUT, 0);
> - if (rtn == SUCCESS)
> +
> + switch (rtn) {
> + case SUCCESS:
> return 0;
> + case NEEDS_RETRY:
> + if (retry_cnt--)
> + goto retry_stu;
> + /*FALLTHRU*/
> + default:
> + return 1;
> + }
This is pretty much an open coded for loop ... how about just doing a
for loop as attached below?
The two advantages to this are:
1. it's cleaner and more readable
2. the compiler knows how to optimize it better
James
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 7a1a1bb..28a266c 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -932,10 +932,12 @@ static int scsi_eh_try_stu(struct scsi_cmnd *scmd)
static unsigned char stu_command[6] = {START_STOP, 0, 0, 0, 1, 0};
if (scmd->device->allow_restart) {
- int rtn;
+ int i, rtn = NEEDS_RETRY;
+
+ for (i = 0; rtn == NEEDS_RETRY && i < 2; i++)
+ rtn = scsi_send_eh_cmnd(scmd, stu_command, 6,
+ START_UNIT_TIMEOUT, 0);
- rtn = scsi_send_eh_cmnd(scmd, stu_command, 6,
- START_UNIT_TIMEOUT, 0);
if (rtn == SUCCESS)
return 0;
}
-
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