video/hmdi: Clear the whole incoming buffer, not just the infoframe size

If the user if this API is providing a bigger buffer than the infoframe
size, it could be for a could reason. For instance it could be because
it gives the buffer that will be written to the hardware, up to the
maximum of an infoframe size.

Instead of just zeroing up to the infoframe size, let's zero the whole
incoming buffer as those extra bytes are also used to compute the
ECC and need to be 0.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
index f7a85e5b7370b3bad699456196880a26424d8a02..635d5690dd5a3a78b548e1ebd47dc5403f6b393c 100644 (file)
--- a/drivers/video/hdmi.c
+++ b/drivers/video/hdmi.c
@@ -84,7 +84,7 @@ ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer,
        if (size < length)
                return -ENOSPC;
 
-       memset(buffer, 0, length);
+       memset(buffer, 0, size);
 
        ptr[0] = frame->type;
        ptr[1] = frame->version;
@@ -186,7 +186,7 @@ ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame, void *buffer,
        if (size < length)
                return -ENOSPC;
 
-       memset(buffer, 0, length);
+       memset(buffer, 0, size);
 
        ptr[0] = frame->type;
        ptr[1] = frame->version;
@@ -251,7 +251,7 @@ ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
        if (size < length)
                return -ENOSPC;
 
-       memset(buffer, 0, length);
+       memset(buffer, 0, size);
 
        if (frame->channels >= 2)
                channels = frame->channels - 1;
@@ -308,7 +308,7 @@ ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
        if (size < length)
                return -ENOSPC;
 
-       memset(buffer, 0, length);
+       memset(buffer, 0, size);
 
        ptr[0] = frame->type;
        ptr[1] = frame->version;