From 6311803b1294432ee680fec5e628efae0d485fa2 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 9 Nov 2012 12:10:42 +0000 Subject: [PATCH] drm: use memchr_inv() Use memchr_inv() to check the specified memory region is filled with zero. Signed-off-by: Akinobu Mita Cc: David Airlie Cc: dri-devel@lists.freedesktop.org Signed-off-by: Dave Airlie --- drivers/gpu/drm/drm_edid.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 856dcd91b3d4..164820003546 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -307,12 +307,9 @@ drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf, static bool drm_edid_is_zero(u8 *in_edid, int length) { - int i; - u32 *raw_edid = (u32 *)in_edid; + if (memchr_inv(in_edid, 0, length)) + return false; - for (i = 0; i < length / 4; i++) - if (*(raw_edid + i) != 0) - return false; return true; } -- 2.20.1