From 35cf2b94d0ecb7034cfa05dd725721538bbb83fc Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sat, 26 Jan 2008 20:13:10 +0100 Subject: 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 Signed-off-by: Bartlomiej Zolnierkiewicz --- include/linux/ide.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') 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 { -- cgit v1.2.3