From 665d66e8fad60a5a162c4615f27f916ad1a6d567 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Tue, 23 Jun 2009 11:35:51 +0000 Subject: 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 Signed-off-by: David S. Miller --- drivers/ide/ide-taskfile.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'drivers/ide/ide-taskfile.c') 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)); } -- cgit v1.2.3-58-ga151