From: Colin Ian King Date: Tue, 29 Nov 2022 22:38:55 +0000 (+0000) Subject: firmware: dmi-sysfs: make pr_info messages rate limited X-Git-Tag: v6.3-rc1~107^2~49 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7d12970f1746d47155f97113ac48b81fd8af8640;p=thirdparty%2Flinux.git firmware: dmi-sysfs: make pr_info messages rate limited Currently if a process repeat repeatedly reads the dmi sysfs raw event log /sys/firmware/dmi/entries/15-0/system_event_log/raw_event_log when GPNV support is missing or using an unknown access method the kernel log gets spammed with info messages. Make the messages rate limited to reduce the message spamming. Triggered when running sudo stress-ng --sysfs -t 5m. Signed-off-by: Colin Ian King Link: https://lore.kernel.org/r/20221129223855.1005674-1-colin.i.king@gmail.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/firmware/dmi-sysfs.c b/drivers/firmware/dmi-sysfs.c index 66727ad3361b9..9b6ce172175c2 100644 --- a/drivers/firmware/dmi-sysfs.c +++ b/drivers/firmware/dmi-sysfs.c @@ -418,10 +418,10 @@ static ssize_t dmi_sel_raw_read_helper(struct dmi_sysfs_entry *entry, return dmi_sel_raw_read_phys32(entry, &sel, state->buf, state->pos, state->count); case DMI_SEL_ACCESS_METHOD_GPNV: - pr_info("dmi-sysfs: GPNV support missing.\n"); + pr_info_ratelimited("dmi-sysfs: GPNV support missing.\n"); return -EIO; default: - pr_info("dmi-sysfs: Unknown access method %02x\n", + pr_info_ratelimited("dmi-sysfs: Unknown access method %02x\n", sel.access_method); return -EIO; }