[PATCH] soundwire: amd: add an error code check in amd_sdw_clock_stop_exit

[Su Hui]

Clang static analyzer complains that value stored to 'ret' is never read.
Add an error code check and print an error message if 'readl_poll_timeout'
failed.

Signed-off-by: Su Hui <suhui@xxxxxxxxxxxx>
---
 drivers/soundwire/amd_manager.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
index 3a99f6dcdfaf..f391b541f4b7 100644
--- a/drivers/soundwire/amd_manager.c
+++ b/drivers/soundwire/amd_manager.c
@@ -1029,6 +1029,10 @@ static int amd_sdw_clock_stop_exit(struct amd_sdw_manager *amd_manager)
 		ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL, val,
 					 (val & AMD_SDW_CLK_RESUME_DONE), ACP_DELAY_US,
 					 AMD_SDW_TIMEOUT);
+		if (ret)
+			dev_err(amd_manager->dev, "%s: timed out: %pe\n", __func__,
+				ERR_PTR(ret));
+
 		if (val & AMD_SDW_CLK_RESUME_DONE) {
 			writel(0, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
 			ret = sdw_bus_exit_clk_stop(&amd_manager->bus);
-- 
2.30.2