lkml.org 
[lkml]   [2012]   [Nov]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[ 023/171] Revert "Staging: Android alarm: IOCTL command encoding fix"
Date
3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Colin Cross <ccross@android.com>

commit d38e0e3fed4f58bcddef4dc93a591dfe2f651cb0 upstream.

Commit 6bd4a5d96c08dc2380f8053b1bd4f879f55cd3c9 changed the
ANDROID_ALARM_GET_TIME ioctls from IOW to IOR. While technically
correct, the _IOC_DIR bits are ignored by alarm_ioctl, so the
commit breaks a userspace ABI used by all existing Android devices
for a purely cosmetic reason. Revert it.

Cc: Dae S. Kim <dae@velatum.com>
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/staging/android/android_alarm.h | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

--- a/drivers/staging/android/android_alarm.h
+++ b/drivers/staging/android/android_alarm.h
@@ -110,12 +110,10 @@ enum android_alarm_return_flags {
#define ANDROID_ALARM_WAIT _IO('a', 1)

#define ALARM_IOW(c, type, size) _IOW('a', (c) | ((type) << 4), size)
-#define ALARM_IOR(c, type, size) _IOR('a', (c) | ((type) << 4), size)
-
/* Set alarm */
#define ANDROID_ALARM_SET(type) ALARM_IOW(2, type, struct timespec)
#define ANDROID_ALARM_SET_AND_WAIT(type) ALARM_IOW(3, type, struct timespec)
-#define ANDROID_ALARM_GET_TIME(type) ALARM_IOR(4, type, struct timespec)
+#define ANDROID_ALARM_GET_TIME(type) ALARM_IOW(4, type, struct timespec)
#define ANDROID_ALARM_SET_RTC _IOW('a', 5, struct timespec)
#define ANDROID_ALARM_BASE_CMD(cmd) (cmd & ~(_IOC(0, 0, 0xf0, 0)))
#define ANDROID_ALARM_IOCTL_TO_TYPE(cmd) (_IOC_NR(cmd) >> 4)



\
 
 \ /
  Last update: 2012-11-22 23:21    [W:0.518 / U:0.252 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site