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| author |   Tejun Heo <htejun@gmail.com> | 2008-01-26 20:13:10 +0100 |
|---|---|---|
| committer |   Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-01-26 20:13:10 +0100 |
| commit | 35cf2b94d0ecb7034cfa05dd725721538bbb83fc (patch) | |
| tree | 6c3681f06b078626aeeb8de1e28bbdd458f95c70 /include | |
| parent | cmd64x: remove /proc/ide/cmd64x (diff) | |
| download | linux-dev-35cf2b94d0ecb7034cfa05dd725721538bbb83fc.tar.xz linux-dev-35cf2b94d0ecb7034cfa05dd725721538bbb83fc.zip | |
ide: fix ->io_32bit race in ide_taskfile_ioctl()
In ide_taskfile_ioctl(), there was a race condition involving
drive->io_32bit. It was cleared and restored during ioctl
requests but there was no synchronization with other requests.
So, other requests could execute with the altered ->io_32bit
setting or updated drive->io_32bit could be overwritten by
ide_taskfile_ioctl().
This patch adds IDE_TFLAG_IO_16BIT flag to indicate to
ide_pio_datablock() that 16-bit I/O is needed regardless of
drive->io_32bit settting.
Bart:
- ported it over recent IDE changes
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ide.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ide.h b/include/linux/ide.h index f94cf036bd95..c1a8b8bb93ab 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -931,6 +931,8 @@ enum { IDE_TFLAG_IN_TF = IDE_TFLAG_IN_NSECT | IDE_TFLAG_IN_LBA, IDE_TFLAG_IN_DEVICE = (1 << 29), + /* force 16-bit I/O operations */ + IDE_TFLAG_IO_16BIT = (1 << 30), }; struct ide_taskfile { |