From d58188c306a010d32a250ae532c3daaae8c57346 Mon Sep 17 00:00:00 2001
From: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Date: Fri, 11 May 2018 14:05:08 -0500
Subject: [PATCH] scsi: cxlflash: Limit the debug logs in the IO path
References: FATE#325192
Patch-mainline: v4.18-rc1
Git-commit: d58188c306a010d32a250ae532c3daaae8c57346
The kernel log can get filled with debug messages from send_cmd_ioarrin()
when dynamic debug is enabled for the cxlflash module and there is a lot of
legacy I/O traffic.
While these messages are necessary to debug issues that involve command
tracking, the abundance of data can overwrite other useful data in the
log. The best option available is to limit the messages that should serve
most of the common use cases.
Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
drivers/scsi/cxlflash/main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index dad2be6c29c3..cf0b407f6ebb 100644
--- a/drivers/scsi/cxlflash/main.c
+++ b/drivers/scsi/cxlflash/main.c
@@ -339,8 +339,8 @@ static int send_cmd_ioarrin(struct afu *afu, struct afu_cmd *cmd)
writeq_be((u64)&cmd->rcb, &hwq->host_map->ioarrin);
out:
spin_unlock_irqrestore(&hwq->hsq_slock, lock_flags);
- dev_dbg(dev, "%s: cmd=%p len=%u ea=%016llx rc=%d\n", __func__,
- cmd, cmd->rcb.data_len, cmd->rcb.data_ea, rc);
+ dev_dbg_ratelimited(dev, "%s: cmd=%p len=%u ea=%016llx rc=%d\n",
+ __func__, cmd, cmd->rcb.data_len, cmd->rcb.data_ea, rc);
return rc;
}
--
2.13.6