Use memchr_inv() to check the specified memory region is filled with zero.
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
---
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;
}
--
1.7.11.7
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