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ide: fix races in handling of user-space SET XFER commands

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* 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>
This commit is contained in:
Bartlomiej Zolnierkiewicz
2009-06-23 11:35:51 +00:00
committed by David S. Miller
parent fa56d4cb40
commit 665d66e8fa
5 changed files with 14 additions and 26 deletions
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10
drivers/ide/ide-iops.c
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@ -363,14 +363,6 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
* this point (lost interrupt).
*/
/*
* FIXME: we race against the running IRQ here if
* this is called from non IRQ context. If we use
* disable_irq() we hang on the error path. Work
* is needed.
*/
disable_irq_nosync(hwif->irq);
udelay(1);
tp_ops->dev_select(drive);
SELECT_MASK(drive, 1);
@ -394,8 +386,6 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
SELECT_MASK(drive, 0);
enable_irq(hwif->irq);
if (error) {
(void) ide_dump_status(drive, "set_drive_speed_status", stat);
return error;