[PATCH] drm/udl: Bugfix in EDID reading routine

[Jani Nikula]

On Mon, 11 Mar 2019, Robert Tarasov <tutankhamen at chromium.org> wrote:
> Yes, you're right. Will prepare another patch which will use
> drm_do_get_edid()

Oh, you might want to have this patch first with cc: stable and all
that, and do the cleanup afterwards.

BR,
Jani.


>
> On Mon, Mar 11, 2019 at 4:33 AM Jani Nikula <jani.nikula at linux.intel.com>
> wrote:
>
>> On Fri, 08 Mar 2019, Robert Tarasov <tutankhamen at chromium.org> wrote:
>> > Fixed bug with reading of last EDID extra block in drm/udl driver.
>> > Previouse approach read all the blocks except the last one.
>> >
>> > Signed-off-by: Robert Tarasov <tutankhamen at chromium.org>
>> > ---
>> >  drivers/gpu/drm/udl/udl_connector.c | 2 +-
>> >  1 file changed, 1 insertion(+), 1 deletion(-)
>> >
>> > diff --git a/drivers/gpu/drm/udl/udl_connector.c
>> b/drivers/gpu/drm/udl/udl_connector.c
>> > index c3dc1fd20cb4..68b221b9a01f 100644
>> > --- a/drivers/gpu/drm/udl/udl_connector.c
>> > +++ b/drivers/gpu/drm/udl/udl_connector.c
>> > @@ -70,7 +70,7 @@ static bool udl_get_edid(struct udl_device *udl, u8
>> **result_buff,
>> >                       memcpy(buff_ptr, block_buff, EDID_LENGTH);
>> >                       kfree(block_buff);
>> >                       buff_ptr += EDID_LENGTH;
>> > -                     for (i = 1; i < extensions; ++i) {
>> > +                     for (i = 1; i <= extensions; ++i) {
>> >                               if (udl_get_edid_block(udl, i, buff_ptr)) {
>> >                                       buff_ptr += EDID_LENGTH;
>> >                               } else {
>>
>> Ugh. Why doesn't udl use drm_do_get_edid()?
>>
>> BR,
>> Jani.
>>
>>
>> --
>> Jani Nikula, Intel Open Source Graphics Center
>>

-- 
Jani Nikula, Intel Open Source Graphics Center