[PATCH] Fix block dev compat ioctl handling

Commit 33c2dca4957bd0da3e1af7b96d0758d97e708ef6 (trim file propagation
in block/compat_ioctl.c) removed the handling of some ioctls from
compat_blkdev_driver_ioctl.  That caused them to be rejected as unknown
by the compat layer.

Signed-off-by: Andreas Schwab <schwab@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index 3d3e7a46f38c43319a2fcbed71e99a5da9af8e68..d43e6087badc4bf728a77ff90a5901edd91224b3 100644 (file)
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -677,6 +677,29 @@ static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
        case DVD_WRITE_STRUCT:
        case DVD_AUTH:
                arg = (unsigned long)compat_ptr(arg);
+       /* These intepret arg as an unsigned long, not as a pointer,
+        * so we must not do compat_ptr() conversion. */
+       case HDIO_SET_MULTCOUNT:
+       case HDIO_SET_UNMASKINTR:
+       case HDIO_SET_KEEPSETTINGS:
+       case HDIO_SET_32BIT:
+       case HDIO_SET_NOWERR:
+       case HDIO_SET_DMA:
+       case HDIO_SET_PIO_MODE:
+       case HDIO_SET_NICE:
+       case HDIO_SET_WCACHE:
+       case HDIO_SET_ACOUSTIC:
+       case HDIO_SET_BUSSTATE:
+       case HDIO_SET_ADDRESS:
+       case CDROMEJECT_SW:
+       case CDROM_SET_OPTIONS:
+       case CDROM_CLEAR_OPTIONS:
+       case CDROM_SELECT_SPEED:
+       case CDROM_SELECT_DISC:
+       case CDROM_MEDIA_CHANGED:
+       case CDROM_DRIVE_STATUS:
+       case CDROM_LOCKDOOR:
+       case CDROM_DEBUG:
                break;
        default:
                /* unknown ioctl number */