[PATCH] drm/msm/dpu: fix incorrect type for ret

[Qianfeng Rong]

Change 'ret' from unsigned long to int, as storing negative error codes
in an unsigned long makes it never equal to -ETIMEDOUT, causing logical
errors.

Fixes: d7d0e73f7de3 ("drm/msm/dpu: introduce the dpu_encoder_phys_* for 
writeback")
Signed-off-by: Qianfeng Rong <rongqianf...@vivo.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
index 56a5b596554d..46f348972a97 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
@@ -446,7 +446,7 @@ static void _dpu_encoder_phys_wb_handle_wbdone_timeout(
 static int dpu_encoder_phys_wb_wait_for_commit_done(
                struct dpu_encoder_phys *phys_enc)
 {
-       unsigned long ret;
+       int ret;
        struct dpu_encoder_wait_info wait_info;
        struct dpu_encoder_phys_wb *wb_enc = to_dpu_encoder_phys_wb(phys_enc);
 
-- 
2.34.1