kernel: add support for linux 3.2.1

SVN-Revision: 29730

1 files changed, 29 insertions, 0 deletions

diff --git a/target/linux/generic/patches-3.2/993-mpcore_wdt_fix_wdioc_setoptions_handling.patch b/target/linux/generic/patches-3.2/993-mpcore_wdt_fix_wdioc_setoptions_handling.patch
new file mode 100644
index 0000000000..fa261ce648
--- /dev/null
+++ b/target/linux/generic/patches-3.2/993-mpcore_wdt_fix_wdioc_setoptions_handling.patch
@@ -0,0 +1,29 @@
+According to the include/linux/watchdog.h WDIOC_SETOPTIONS is
+classified as 'read from device' ioctl call:
+  #define WDIOC_SETOPTIONS        _IOR(WATCHDOG_IOCTL_BASE, 4, int)
+
+However, the driver 'mpcore_wdt' performs 'copy_from_user' only if
+_IOC_WRITE is set, thus the local variable 'uarg' which is used in
+WDIOC_SETOPTIONS handling remains uninitialized.
+
+The proper way to fix this is to bind WDIOC_SETOPTIONS to _IOW,
+but this will break compatibility.
+So adding additional condition for performing 'copy_from_user'.
+
+Signed-off-by: Vitaly Kuzmichev <vkuzmichev@mvista.com>
+---
+ drivers/watchdog/mpcore_wdt.c |    3 ++-
+ 1 files changed, 2 insertions(+), 1 deletions(-)
+
+--- a/drivers/watchdog/mpcore_wdt.c
++++ b/drivers/watchdog/mpcore_wdt.c
+@@ -233,7 +233,8 @@ static long mpcore_wdt_ioctl(struct file
+ 	if (_IOC_DIR(cmd) && _IOC_SIZE(cmd) > sizeof(uarg))
+ 		return -ENOTTY;
+ 
+-	if (_IOC_DIR(cmd) & _IOC_WRITE) {
++	if ((_IOC_DIR(cmd) & _IOC_WRITE)
++			|| cmd == WDIOC_SETOPTIONS) {
+ 		ret = copy_from_user(&uarg, (void __user *)arg, _IOC_SIZE(cmd));
+ 		if (ret)
+ 			return -EFAULT;