Patchwork [3.5.y.z,extended,stable] Patch "Revert "Staging: Android alarm: IOCTL command encoding fix"" has been added to staging queue

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Submitter Herton Ronaldo Krzesinski
Date Dec. 7, 2012, 4:05 p.m.
Message ID <1354896338-22714-1-git-send-email-herton.krzesinski@canonical.com>
Download mbox | patch
Permalink /patch/204555/
State New
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Comments

Herton Ronaldo Krzesinski - Dec. 7, 2012, 4:05 p.m.
This is a note to let you know that I have just added a patch titled

    Revert "Staging: Android alarm: IOCTL command encoding fix"

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Herton

------

From 00e277727baca5330496533f78ccd080b16afd12 Mon Sep 17 00:00:00 2001
From: Colin Cross <ccross@android.com>
Date: Wed, 7 Nov 2012 18:21:51 -0800
Subject: [PATCH] Revert "Staging: Android alarm: IOCTL command encoding fix"

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>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
---
 drivers/staging/android/android_alarm.h |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--
1.7.9.5

Patch

diff --git a/drivers/staging/android/android_alarm.h b/drivers/staging/android/android_alarm.h
index f2ffd96..d0cafd6 100644
--- a/drivers/staging/android/android_alarm.h
+++ b/drivers/staging/android/android_alarm.h
@@ -51,12 +51,10 @@  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)