On Wed, May 18, 2016 at 10:31 PM, Heinrich Schuchardt
<xypron.glpk@xxxxxx> wrote:
> Only dereference sender after checking if sender is NULL.
Hi Heinrich
I think we had a patch that did something similar a while ago. Don't
remember what happened to it. We do check for !sender right before
calling this function (at only one call-site) so it cannot be NULL at
this point. I would be ok with your change if you also remove the
extra checks in mdfld_dsi_read_mcs(). That way we don't double check
and we check at the point where it actually matters.
Thanks
Patrik
>
> Signed-off-by: Heinrich Schuchardt <xypron.glpk@xxxxxx>
> ---
> drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c b/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c
> index 1616af2..c50534c 100644
> --- a/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c
> +++ b/drivers/gpu/drm/gma500/mdfld_dsi_pkg_sender.c
> @@ -520,7 +520,7 @@ static int __read_panel_data(struct mdfld_dsi_pkg_sender *sender, u8 data_type,
> u8 *data, u16 len, u32 *data_out, u16 len_out, bool hs)
> {
> unsigned long flags;
> - struct drm_device *dev = sender->dev;
> + struct drm_device *dev;
> int i;
> u32 gen_data_reg;
> int retry = MDFLD_DSI_READ_MAX_COUNT;
> @@ -530,6 +530,8 @@ static int __read_panel_data(struct mdfld_dsi_pkg_sender *sender, u8 data_type,
> return -EINVAL;
> }
>
> + dev = sender->dev;
> +
> /**
> * do reading.
> * 0) send out generic read request
> --
> 2.1.4
>
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