[PATCH v2 1/5] media: iris: fail firmware boot on invalid uc_region

[Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>]

iris_vpu_boot_firmware() polls CTRL_STATUS while the firmware boots. When
the hardware reports an invalid uc_region setting, the poll loop breaks
early with count still below max_tries. The following timeout check
(count >= max_tries) is therefore false, so the function skips the error
return and falls through to return 0, reporting a successful boot. The
caller then enables host interrupts and proceeds to use firmware that
never came up, which can lead to unhandled timeouts or hardware hangs.

Return an error directly from the uc_region error path instead of breaking
out of the loop and reporting success.

Fixes: abf5bac63f68 ("media: iris: implement the boot sequence of the firmware")
Assisted-by: Claude:claude-opus-4-8
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
 drivers/media/platform/qcom/iris/iris_vpu_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/iris/iris_vpu_common.c b/drivers/media/platform/qcom/iris/iris_vpu_common.c
index e4847c107709..819db7569524 100644
--- a/drivers/media/platform/qcom/iris/iris_vpu_common.c
+++ b/drivers/media/platform/qcom/iris/iris_vpu_common.c
@@ -84,7 +84,7 @@ int iris_vpu_boot_firmware(struct iris_core *core)
 		ctrl_status = readl(core->reg_base + CTRL_STATUS);
 		if ((ctrl_status & CTRL_ERROR_STATUS__M) == 0x4) {
 			dev_err(core->dev, "invalid setting for uc_region\n");
-			break;
+			return -EINVAL;
 		}
 
 		usleep_range(50, 100);

-- 
2.47.3