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Staging: asus_oled: fix image processing 

Programming an image was broken, because odev->buf_offs was not advanced
for val == 0 in append_values(). This regression was introduced in:

 commit 1ff12a4aa3
 Author: Kevin A. Granade <kevin.granade@gmail.com>
 Date:   Sat Sep 5 01:03:39 2009 -0500

     Staging: asus_oled: Cleaned up checkpatch issues.

Fix the image processing by special-casing val == 0.

I have tested this change on an Asus G50V laptop only.

Cc: Jakub Schmidtke <sjakub@gmail.com>
Cc: Kevin A. Granade <kevin.granade@gmail.com>
Signed-off-by: Pekka Paalanen <pq@iki.fi>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Pekka Paalanen 2012-01-22 16:33:46 +02:00 committed by Greg Kroah-Hartman
parent 3c1b86f170
commit 635032cb39
1 changed files with 8 additions and 2 deletions
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10
drivers/staging/asus_oled/asus_oled.c
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@ -355,7 +355,14 @@ static void send_data(struct asus_oled_dev *odev)
static int append_values(struct asus_oled_dev *odev, uint8_t val, size_t count)
{
while (count-- > 0 && val) {
odev->last_val = val;
if (val == 0) {
odev->buf_offs += count;
return 0;
}
while (count-- > 0) {
size_t x = odev->buf_offs % odev->width;
size_t y = odev->buf_offs / odev->width;
size_t i;
@ -406,7 +413,6 @@ static int append_values(struct asus_oled_dev *odev, uint8_t val, size_t count)
;
}
odev->last_val = val;
odev->buf_offs++;
}