The dst pointer was being advanced by the clip width, not the full line stride, resulting in corruption. The clip offset was also calculated incorrectly.
Cc: stable@vger.kernel.org Signed-off-by: Hector Martin marcan@marcan.st --- drivers/gpu/drm/drm_format_helper.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index e676921422b8..12bc6b45e95b 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -366,12 +366,12 @@ void drm_fb_xrgb8888_to_rgb888_dstclip(void __iomem *dst, unsigned int dst_pitch return;
vaddr += clip_offset(clip, fb->pitches[0], sizeof(u32)); - dst += clip_offset(clip, dst_pitch, sizeof(u16)); + dst += clip_offset(clip, dst_pitch, 3); for (y = 0; y < lines; y++) { drm_fb_xrgb8888_to_rgb888_line(dbuf, vaddr, linepixels); memcpy_toio(dst, dbuf, dst_len); vaddr += fb->pitches[0]; - dst += dst_len; + dst += dst_pitch; }
kfree(dbuf);