[PATCH] ide: Allow IDE interface to specify its not capable of 32-bit operations

In some embedded systems the IDE hardware interface may only support 16-bit
or smaller accesses.  Allow the interface to specify if this is the case
and don't allow the drive or user to override the setting.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/ide.h b/include/linux/ide.h
index a7fc4cc79b23..8d2db412ba9c 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -792,6 +792,7 @@ typedef struct hwif_s {
         unsigned        no_dsc     : 1; /* 0 default, 1 dsc_overlap disabled */
         unsigned        auto_poll  : 1; /* supports nop auto-poll */
         unsigned        sg_mapped  : 1; /* sg_table and sg_nents are ready */
+        unsigned        no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
 
         struct device   gendev;
         struct completion gendev_rel_comp; /* To deal with device release() */