linux-kernel - [PATCH][next] ACPI: OSL: ratelimit ACPICA kernel messages

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Message-ID: <20250213181610.718343-1-colin.i.king@gmail.com>
Date: Thu, 13 Feb 2025 18:16:10 +0000
From: Colin Ian King <colin.i.king@...il.com>
To: "Rafael J . Wysocki" <rafael@...nel.org>,
	Len Brown <lenb@...nel.org>,
	linux-acpi@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH][next] ACPI: OSL: ratelimit ACPICA kernel messages

In cases where the ACPI AML contains errors there can be quite a large
amount of ACPICA kernel log spamming. Reduce this by rate limiting
the messages.

Signed-off-by: Colin Ian King <colin.i.king@...il.com>
---
 drivers/acpi/osl.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 5ff343096ece..d4ece68e0fd6 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -159,17 +159,21 @@ void __printf(1, 0) acpi_os_vprintf(const char *fmt, va_list args)
 	if (acpi_in_debugger) {
 		kdb_printf("%s", buffer);
 	} else {
-		if (printk_get_level(buffer))
-			printk("%s", buffer);
-		else
-			printk(KERN_CONT "%s", buffer);
+		if (printk_ratelimit()) {
+			if (printk_get_level(buffer))
+				printk("%s", buffer);
+			else
+				printk(KERN_CONT "%s", buffer);
+		}
 	}
 #else
 	if (acpi_debugger_write_log(buffer) < 0) {
-		if (printk_get_level(buffer))
-			printk("%s", buffer);
-		else
-			printk(KERN_CONT "%s", buffer);
+		if (printk_ratelimit()) {
+			if (printk_get_level(buffer))
+				printk("%s", buffer);
+			else
+				printk(KERN_CONT "%s", buffer);
+		}
 	}
 #endif
 }
-- 
2.47.2