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powerpc/powernv: Rate limit opal-elog read failure message 

Sometimes we can't read an error log from OPAL, and we print an error
message accordingly. But the OPAL userspace tools seem to like retrying a
lot, in which case we flood the kernel log with a lot of messages.

Change pr_err() to pr_err_ratelimited() to help with this.

Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201211021140.28402-1-ajd@linux.ibm.com
This commit is contained in:
Andrew Donnellan 2020-12-11 13:11:41 +11:00 committed by Michael Ellerman
parent 20e9de85ed
commit c88017cf2a
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/platforms/powernv/opal-elog.c
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@ -171,8 +171,8 @@ static ssize_t raw_attr_read(struct file *filep, struct kobject *kobj,
opal_rc = opal_read_elog(__pa(elog->buffer),
elog->size, elog->id);
if (opal_rc != OPAL_SUCCESS) {
pr_err("ELOG: log read failed for log-id=%llx\n",
elog->id);
pr_err_ratelimited("ELOG: log read failed for log-id=%llx\n",
elog->id);
kfree(elog->buffer);
elog->buffer = NULL;
return -EIO;