From e19f8fa6ce1ca9b8b934ba7d2e8f34c95abc6e60 Mon Sep 17 00:00:00 2001
From: Rob Clark <robdclark@chromium.org>
Date: Wed, 1 Jun 2022 07:51:16 -0700
Subject: [PATCH] dma-debug: make things less spammy under memory pressure
Git-commit: e19f8fa6ce1ca9b8b934ba7d2e8f34c95abc6e60
Patch-mainline: v5.19-rc2
References: git-fixes

Limit the error msg to avoid flooding the console.  If you have a lot of
threads hitting this at once, they could have already gotten passed the
dma_debug_disabled() check before they get to the point of allocation
failure, resulting in quite a lot of this error message spamming the
log.  Use pr_err_once() to limit that.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 kernel/dma/debug.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/dma/debug.c
+++ b/kernel/dma/debug.c
@@ -564,7 +564,7 @@ static void add_dma_entry(struct dma_deb
 
 	rc = active_cacheline_insert(entry);
 	if (rc == -ENOMEM) {
-		pr_err("cacheline tracking ENOMEM, dma-debug disabled\n");
+		pr_err_once("cacheline tracking ENOMEM, dma-debug disabled\n");
 		global_disable = true;
 	} else if (rc == -EEXIST) {
 		err_printk(entry->dev, entry,