This is a note to let you know that I've just added the patch titled
sony-laptop: fix SNC buffer calls when SN06 returns Integers
to the 3.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sony-laptop-fix-snc-buffer-calls-when-sn06-returns-integers.patch
and it can be found in the queue-3.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From dcbeec264d73b7228ffdfe767eab69b2353099b1 Mon Sep 17 00:00:00 2001
From: Mattia Dongili <[email protected]>
Date: Fri, 21 Dec 2012 07:21:09 +0900
Subject: sony-laptop: fix SNC buffer calls when SN06 returns Integers
From: Mattia Dongili <[email protected]>
commit dcbeec264d73b7228ffdfe767eab69b2353099b1 upstream.
SN06 in some cases returns an Integer instead of a buffer. While the
code handling the return value was trying to cope with the difference,
the memcpy call was not making any difference between the two types of
acpi_object union. This regression was introduced in 3.5.
While there also rework the return value logic to improve readability.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=48671
Cc: Fabrizio Narni <[email protected]>
Cc: <[email protected]>
Signed-off-by: Mattia Dongili <[email protected]>
Signed-off-by: Matthew Garrett <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/platform/x86/sony-laptop.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -786,28 +786,29 @@ static int sony_nc_int_call(acpi_handle
static int sony_nc_buffer_call(acpi_handle handle, char *name, u64 *value,
void *buffer, size_t buflen)
{
+ int ret = 0;
size_t len = len;
union acpi_object *object = __call_snc_method(handle, name, value);
if (!object)
return -EINVAL;
- if (object->type == ACPI_TYPE_BUFFER)
+ if (object->type == ACPI_TYPE_BUFFER) {
len = MIN(buflen, object->buffer.length);
+ memcpy(buffer, object->buffer.pointer, len);
- else if (object->type == ACPI_TYPE_INTEGER)
+ } else if (object->type == ACPI_TYPE_INTEGER) {
len = MIN(buflen, sizeof(object->integer.value));
+ memcpy(buffer, &object->integer.value, len);
- else {
+ } else {
pr_warn("Invalid acpi_object: expected 0x%x got 0x%x\n",
ACPI_TYPE_BUFFER, object->type);
- kfree(object);
- return -EINVAL;
+ ret = -EINVAL;
}
- memcpy(buffer, object->buffer.pointer, len);
kfree(object);
- return 0;
+ return ret;
}
struct sony_nc_handles {
Patches currently in stable-queue which might be from [email protected] are
queue-3.7/sony-laptop-fix-snc-buffer-calls-when-sn06-returns-integers.patch
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