[PATCH 10/14] ide: unify exit paths in task_pio_intr()

Bartlomiej Zolnierkiewicz
2009-02-02T21:41:55Z

Subject: [PATCH] ide: unify exit paths in task_pio_intr()

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
'goto' rules!

drivers/ide/ide-taskfile.c | 37 +++++++++++++++++--------------------
1 file changed, 17 insertions(+), 20 deletions(-)

Index: b/drivers/ide/ide-taskfile.c
===================================================================
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -322,35 +322,28 @@ static ide_startstop_t task_pio_intr(ide
if (write == 0) {
/* Error? */
if (stat & ATA_ERR)
- return task_error(drive, cmd, __func__, stat);
+ goto out_err;

/* Didn't want any data? Odd. */
if ((stat & ATA_DRQ) == 0) {
/* Command all done? */
- if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
- ide_finish_cmd(drive, cmd, stat);
- return ide_stopped;
- }
+ if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
+ goto out_end;

/* Assume it was a spurious irq */
- ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE,
- NULL);
-
- return ide_started;
+ goto out_wait;
}
} else {
if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
- return task_error(drive, cmd, __func__, stat);
+ goto out_err;

/* Deal with unexpected ATA data phase. */
if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
- return task_error(drive, cmd, __func__, stat);
+ goto out_err;
}

- if (write && cmd->nleft == 0) {
- ide_finish_cmd(drive, cmd, stat);
- return ide_stopped;
- }
+ if (write && cmd->nleft == 0)
+ goto out_end;

/* Still data left to transfer. */
ide_pio_datablock(drive, cmd, write);
@@ -359,15 +352,19 @@ static ide_startstop_t task_pio_intr(ide
if (write == 0 && cmd->nleft == 0) {
stat = wait_drive_not_busy(drive);
if (!OK_STAT(stat, 0, BAD_STAT))
- return task_error(drive, cmd, __func__, stat);
- ide_finish_cmd(drive, cmd, stat);
- return ide_stopped;
- }
+ goto out_err;

+ goto out_end;
+ }
+out_wait:
/* Still data left to transfer. */
ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE, NULL);
-
return ide_started;
+out_end:
+ ide_finish_cmd(drive, cmd, stat);
+ return ide_stopped;
+out_err:
+ return task_error(drive, cmd, __func__, stat);
}

static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,