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authorTejun Heo <htejun@gmail.com>2008-01-26 20:13:10 +0100
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-01-26 20:13:10 +0100
commit35cf2b94d0ecb7034cfa05dd725721538bbb83fc (patch)
tree6c3681f06b078626aeeb8de1e28bbdd458f95c70 /include
parent63c4467805c9b23231d8bc9b61305b2013f9fea2 (diff)
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.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ide.h b/include/linux/ide.h
index f94cf036bd9..c1a8b8bb93a 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 {