[RESEND] [PATCH] ipr: Rate limit DMA mapping errors

[RESEND] [PATCH] ipr: Rate limit DMA mapping errors

[Wayne Boyer]

Resending this based on James' request that was sent to the
linux-scsi list on May 10.

---

I noticed a stream of errors from the IPR driver while doing
IOMMU fault injection. Rate limit the errors so we don't clog
up the console and logfiles.

Signed-off-by: Anton Blanchard <anton@samba.org>
---

Index: linux-powerpc/drivers/scsi/ipr.c
===================================================================
--- linux-powerpc.orig/drivers/scsi/ipr.c	2011-05-03 16:35:10.304480474 +1000
+++ linux-powerpc/drivers/scsi/ipr.c	2011-05-09 10:00:41.439578385 +1000
@@ -5143,7 +5143,8 @@ static int ipr_build_ioadl64(struct ipr_

 	nseg = scsi_dma_map(scsi_cmd);
 	if (nseg < 0) {
-		dev_err(&ioa_cfg->pdev->dev, "pci_map_sg failed!\n");
+		if (printk_ratelimit())
+			dev_err(&ioa_cfg->pdev->dev, "pci_map_sg failed!\n");
 		return -1;
 	}

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