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| author | Pekka Paalanen <pq@iki.fi> | 2012-01-22 16:33:46 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-13 11:28:50 -0800 |
| commit | 76058ae1c7386da3de3ad6ebd8fce5d4fc5ae59d (patch) | |
| tree | cfbc874eed272cbe8680db477755efc23c8cecc3 | |
| parent | 0361185a6c75eaff5f4ddb747f54a23b94f6bcd6 (diff) | |
| download | lwn-76058ae1c7386da3de3ad6ebd8fce5d4fc5ae59d.tar.gz lwn-76058ae1c7386da3de3ad6ebd8fce5d4fc5ae59d.zip | |
Staging: asus_oled: fix image processing
commit 635032cb397b396241372fa0ff36ae758e658b23 upstream.
Programming an image was broken, because odev->buf_offs was not advanced
for val == 0 in append_values(). This regression was introduced in:
commit 1ff12a4aa354bed093a0240d5e6347b1e27601bc
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/asus_oled/asus_oled.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/staging/asus_oled/asus_oled.c b/drivers/staging/asus_oled/asus_oled.c index 8a05725cb1d0..ea99f055abb6 100644 --- a/drivers/staging/asus_oled/asus_oled.c +++ b/drivers/staging/asus_oled/asus_oled.c @@ -349,7 +349,14 @@ 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; @@ -400,7 +407,6 @@ static int append_values(struct asus_oled_dev *odev, uint8_t val, size_t count) ; } - odev->last_val = val; odev->buf_offs++; } |