Use memchr_inv() to check the specified memory region is filled with zero.
Signed-off-by: Akinobu Mita akinobu.mita@gmail.com Cc: David Airlie airlied@linux.ie Cc: dri-devel@lists.freedesktop.org --- 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 fadcd44..59260bf 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; }