The smn_read_register() helper returns negative error codes on failure or the register value on success. When used with read_poll_timeout(), the return value is stored in the 'data' variable. Currently 'data' is declared as u32, which causes negative error codes to be cast to large positive values. This makes the condition 'data > 0' incorrectly treat errors as success. Fix by changing 'data' from u32 to int, matching the pattern used in psp_mbox_ready() which correctly handles the same helper function. Reported-by: Dan Carpenter <error27@gmail.com> Closes: https://lore.kernel.org/linux-sound/agGES8vWrLOrBu28@stanley.mountain/ Fixes: f120cf33d232 ("ASoC: SOF: amd: Use AMD_NODE") Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> --- sound/soc/sof/amd/acp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/sof/amd/acp.c b/sound/soc/sof/amd/acp.c index 71a18f156de23..f615b8d1c8020 100644 --- a/sound/soc/sof/amd/acp.c +++ b/sound/soc/sof/amd/acp.c @@ -223,7 +223,7 @@ static int psp_send_cmd(struct acp_dev_data *adata, int cmd) { struct snd_sof_dev *sdev = adata->dev; int ret; - u32 data; + int data; if (!cmd) return -EINVAL; -- 2.43.0