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| author | Borislav Petkov <petkovbb@gmail.com> | 2009-06-07 15:37:05 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-06-07 15:37:05 +0200 |
| commit | 626542ca2277961aaa64855206574f8ca4f360e3 (patch) | |
| tree | 88f2071580dbe02c43741dd112d8f7b98eea0938 /drivers/ide/ide-tape.c | |
| parent | pdc202xx_old: kill resetproc() method (diff) | |
| download | linux-626542ca2277961aaa64855206574f8ca4f360e3.tar.xz linux-626542ca2277961aaa64855206574f8ca4f360e3.zip | |
ide-tape: change IDE_AFLAG_IGNORE_DSC non-atomically
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>
Diffstat (limited to 'drivers/ide/ide-tape.c')
| -rw-r--r-- | drivers/ide/ide-tape.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c index 203bbeac182f..f1d3c7b2a2b5 100644 --- a/drivers/ide/ide-tape.c +++ b/drivers/ide/ide-tape.c @@ -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); |