[linux-yocto] [PATCH] uvesafb: print error message when task timeout occurs

[Jianxun Zhang]

The driver waits for response from user space for a pending
task until a timeout (UVESAFB_TIMEOUT) occurs. But the
existing error message in later steps is a little obscure.

This patch throws out an error message when timeout happens.

Signed-off-by: Jianxun Zhang <jianxun.zhang at linux.intel.com>
---
 drivers/video/fbdev/uvesafb.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/uvesafb.c b/drivers/video/fbdev/uvesafb.c
index 178ae93..13bbb61 100644
--- a/drivers/video/fbdev/uvesafb.c
+++ b/drivers/video/fbdev/uvesafb.c
@@ -211,9 +211,13 @@ static int uvesafb_exec(struct uvesafb_ktask *task)
 	} else if (err == -ENOBUFS)
 		err = 0;
 
-	if (!err && !(task->t.flags & TF_EXIT))
+	if (!err && !(task->t.flags & TF_EXIT)) {
 		err = !wait_for_completion_timeout(task->done,
 				msecs_to_jiffies(UVESAFB_TIMEOUT));
+		if (err)
+			printk_ratelimited(KERN_ERR "uvesafb: %u ms task timeout error\n",
+					UVESAFB_TIMEOUT);
+	}
 
 	mutex_lock(&uvfb_lock);
 	uvfb_tasks[seq] = NULL;
-- 
1.9.1