[PATCH v3 1/2] staging: sm750fb: return -ETIMEDOUT on timeout in de_wait functions

Hungyu Lin
2026-04-27T05:47:54Z

The hw_sm750le_de_wait() and hw_sm750_de_wait() functions return -1
when a timeout occurs. Replace these with -ETIMEDOUT to use a proper
errno value and better describe the error condition.

All callers check the return value as non-zero, so this change does
not alter existing behavior.

Signed-off-by: Hungyu Lin <dennylin0707@gmail.com>
---
drivers/staging/sm750fb/sm750_hw.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/sm750fb/sm750_hw.c b/drivers/staging/sm750fb/sm750_hw.c
index a2798d428663..ab3d4a2bf1a6 100644
--- a/drivers/staging/sm750fb/sm750_hw.c
+++ b/drivers/staging/sm750fb/sm750_hw.c
@@ -501,8 +501,8 @@ int hw_sm750le_de_wait(void)
(DE_STATE2_DE_FIFO_EMPTY | DE_STATE2_DE_MEM_FIFO_EMPTY))
return 0;
}
- /* timeout error */
- return -1;
+
+ return -ETIMEDOUT;
}

int hw_sm750_de_wait(void)
@@ -519,8 +519,8 @@ int hw_sm750_de_wait(void)
(SYSTEM_CTRL_DE_FIFO_EMPTY | SYSTEM_CTRL_DE_MEM_FIFO_EMPTY))
return 0;
}
- /* timeout error */
- return -1;
+
+ return -ETIMEDOUT;
}

int hw_sm750_pan_display(struct lynxfb_crtc *crtc,
--
2.34.1