From aa5b7d11c7cb87c266d705b237368985e7171958 Mon Sep 17 00:00:00 2001 From: Michael Kelley Date: Tue, 20 Apr 2021 08:44:19 -0700 Subject: video: hyperv_fb: Add ratelimit on error message Due to a full ring buffer, the driver may be unable to send updates to the Hyper-V host. But outputing the error message can make the problem worse because console output is also typically written to the frame buffer. As a result, in some circumstances the error message is output continuously. Break the cycle by rate limiting the error message. Also output the error code for additional diagnosability. Signed-off-by: Michael Kelley Link: https://lore.kernel.org/r/1618933459-10585-1-git-send-email-mikelley@microsoft.com Signed-off-by: Wei Liu --- drivers/video/fbdev/hyperv_fb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/video') diff --git a/drivers/video/fbdev/hyperv_fb.c b/drivers/video/fbdev/hyperv_fb.c index c8b0ae676809..68adbf8d517a 100644 --- a/drivers/video/fbdev/hyperv_fb.c +++ b/drivers/video/fbdev/hyperv_fb.c @@ -308,7 +308,7 @@ static inline int synthvid_send(struct hv_device *hdev, VM_PKT_DATA_INBAND, 0); if (ret) - pr_err("Unable to send packet via vmbus\n"); + pr_err_ratelimited("Unable to send packet via vmbus; error %d\n", ret); return ret; } -- cgit