drm/bridge: ps8640: Fix size mismatch warning w/ len

[ Upstream commit 35ba6bd582cf926a082296b7e9a876ec81136cb1 ]

After commit 26195af57798 ("drm/bridge: ps8640: Drop the ability of
ps8640 to fetch the EDID"), I got an error compiling:

  error: comparison of distinct pointer types
  ('typeof (len) *' (aka 'unsigned int *') and
   'typeof (msg->size) *' (aka 'unsigned long *'))
  [-Werror,-Wcompare-distinct-pointer-types]

Fix it by declaring the `len` as size_t.

The above error only shows up on downstream kernels without commit
d03eba99f5bf ("minmax: allow min()/max()/clamp() if the arguments have
the same signedness."), but since commit 26195af57798 ("drm/bridge:
ps8640: Drop the ability of ps8640 to fetch the EDID") is a "Fix" that
will likely be backported it seems nice to make it easy. ...plus it's
more correct to declare `len` as size_t anyway.

Fixes: 26195af57798 ("drm/bridge: ps8640: Drop the ability of ps8640 to fetch the EDID")
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231218090454.1.I5c6eb80b2f746439c4b58efab788e00701d08759@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index d264b80..541e4f5 100644 (file)
--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -210,7 +210,7 @@ static ssize_t ps8640_aux_transfer_msg(struct drm_dp_aux *aux,
        struct ps8640 *ps_bridge = aux_to_ps8640(aux);
        struct regmap *map = ps_bridge->regmap[PAGE0_DP_CNTL];
        struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;
-       unsigned int len = msg->size;
+       size_t len = msg->size;
        unsigned int data;
        unsigned int base;
        int ret;