Re: [PATCH] media: videobuf2: always set buffer vb2 pointer

[Chen-Yu Tsai]

On Tue, Sep 28, 2021 at 2:16 PM Sergey Senozhatsky
<senozhatsky@xxxxxxxxxxxx> wrote:
>
> We need to always link allocated vb2_dc_buf back to vb2_buffer because
> we dereference vb2 in prepare() and finish() callbacks.
>
> Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>

This fixes the breakage from the "videobuf2: support new noncontiguous DMA
API" series on the RK3399 Scarlet if the ChromeOS patch that changes
min_buffers_needed to 0 [1] is not applied.

Since there are other in-tree drivers that have min_buffers_needed=0,
I would recommend getting some more testing.

ChenYu

[1] https://crrev.com/c/3168489