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ide-tape: change IDE_AFLAG_IGNORE_DSC non-atomically

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There are two sites where the flag is being changed: ide_retry_pc
and idetape_do_request. Both codepaths are protected by hwif->busy
(ide_lock_port) and therefore we shouldn't need the atomic accesses.

Spotted-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov 2009-06-07 15:37:05 +02:00 committed by Bartlomiej Zolnierkiewicz
parent ffddf1717b
commit 626542ca22
2 changed files with 8 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/ide/ide-atapi.c
View file

@ -258,7 +258,7 @@ void ide_retry_pc(ide_drive_t *drive)
pc->req_xfer = sense_rq->data_len;
if (drive->media == ide_tape)
set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC;
if (ide_queue_sense_rq(drive, pc))
ide_complete_rq(drive, -EIO, blk_rq_bytes(drive->hwif->rq));

12
drivers/ide/ide-tape.c
View file

@ -656,15 +656,15 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
if ((drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) == 0 &&
(rq->cmd[13] & REQ_IDETAPE_PC2) == 0)
set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC;
if (drive->dev_flags & IDE_DFLAG_POST_RESET) {
set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC;
drive->dev_flags &= ~IDE_DFLAG_POST_RESET;
}
if (!test_and_clear_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags) &&
(stat & ATA_DSC) == 0) {
if (!(drive->atapi_flags & IDE_AFLAG_IGNORE_DSC) &&
!(stat & ATA_DSC)) {
if (postponed_rq == NULL) {
tape->dsc_polling_start = jiffies;
tape->dsc_poll_freq = tape->best_dsc_rw_freq;
@ -684,7 +684,9 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
tape->dsc_poll_freq = IDETAPE_DSC_MA_SLOW;
idetape_postpone_request(drive);
return ide_stopped;
}
} else
drive->atapi_flags &= ~IDE_AFLAG_IGNORE_DSC;
if (rq->cmd[13] & REQ_IDETAPE_READ) {
pc = &tape->queued_pc;
ide_tape_create_rw_cmd(tape, pc, rq, READ_6);