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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-06-23 13:35:51 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-08-07 19:43:00 +0200 |
| commit | 665d66e8fad60a5a162c4615f27f916ad1a6d567 (patch) | |
| tree | 2e4f699f4fec1ca4010a39b9dd787fbd5f03b44d /drivers/ide/ide-taskfile.c | |
| parent | ide: allow ide_dev_read_id() to be called from the IRQ context (diff) | |
| download | linux-665d66e8fad60a5a162c4615f27f916ad1a6d567.tar.xz linux-665d66e8fad60a5a162c4615f27f916ad1a6d567.zip | |
ide: fix races in handling of user-space SET XFER commands
* Make cmd->tf_flags field 'u16' and add IDE_TFLAG_SET_XFER taskfile flag.
* Update ide_finish_cmd() to set xfer / re-read id if the new flag is set.
* Convert set_xfer_rate() (write handler for /proc/ide/hd?/current_speed)
and ide_cmd_ioctl() (HDIO_DRIVE_CMD ioctl handler) to use the new flag.
* Remove no longer needed disable_irq_nosync() + enable_irq() from
ide_config_drive_speed().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ide/ide-taskfile.c')
| -rw-r--r-- | drivers/ide/ide-taskfile.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c index 50336d51eebc..cc8633cbe133 100644 --- a/drivers/ide/ide-taskfile.c +++ b/drivers/ide/ide-taskfile.c @@ -324,10 +324,17 @@ static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd) void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat) { struct request *rq = drive->hwif->rq; - u8 err = ide_read_error(drive); + u8 err = ide_read_error(drive), nsect = cmd->tf.nsect; + u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER); ide_complete_cmd(drive, cmd, stat, err); rq->errors = err; + + if (err == 0 && set_xfer) { + ide_set_xfer_rate(drive, nsect); + ide_driveid_update(drive); + } + ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq)); } |