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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-ioctls.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-ioctls.c')
| -rw-r--r-- | drivers/ide/ide-ioctls.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/ide/ide-ioctls.c b/drivers/ide/ide-ioctls.c index e246d3d3fbcc..d3440b5010a5 100644 --- a/drivers/ide/ide-ioctls.c +++ b/drivers/ide/ide-ioctls.c @@ -167,6 +167,8 @@ static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg) err = -EINVAL; goto abort; } + + cmd.tf_flags |= IDE_TFLAG_SET_XFER; } err = ide_raw_taskfile(drive, &cmd, buf, args[3]); @@ -174,12 +176,6 @@ static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg) args[0] = tf->status; args[1] = tf->error; args[2] = tf->nsect; - - if (!err && xfer_rate) { - /* active-retuning-calls future */ - ide_set_xfer_rate(drive, xfer_rate); - ide_driveid_update(drive); - } abort: if (copy_to_user((void __user *)arg, &args, 4)) err = -EFAULT; |