scsi: vmw_pvscsi: Silence dma mapping errors

These errors typically occur with swiotlb when the swiotlb buffer is full.
But they are transient and would typically unnecessarily worry a user.
Instead of errors, print debug messages.

Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20191203193052.7583-2-thomas_os@shipmail.org
Acked-by: Jim Gill <jgill@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/vmw_pvscsi.c b/drivers/scsi/vmw_pvscsi.c
index 8a09d184a32091e3c723a7630f6dfb1a3ddbc4e6..c3f010df641efa1b569fb014046af4b954b3243d 100644 (file)
--- a/drivers/scsi/vmw_pvscsi.c
+++ b/drivers/scsi/vmw_pvscsi.c
@@ -365,7 +365,7 @@ static int pvscsi_map_buffers(struct pvscsi_adapter *adapter,
                int segs = scsi_dma_map(cmd);
 
                if (segs == -ENOMEM) {
-                       scmd_printk(KERN_ERR, cmd,
+                       scmd_printk(KERN_DEBUG, cmd,
                                    "vmw_pvscsi: Failed to map cmd sglist for DMA.\n");
                        return -ENOMEM;
                } else if (segs > 1) {
@@ -392,7 +392,7 @@ static int pvscsi_map_buffers(struct pvscsi_adapter *adapter,
                ctx->dataPA = dma_map_single(&adapter->dev->dev, sg, bufflen,
                                             cmd->sc_data_direction);
                if (dma_mapping_error(&adapter->dev->dev, ctx->dataPA)) {
-                       scmd_printk(KERN_ERR, cmd,
+                       scmd_printk(KERN_DEBUG, cmd,
                                    "vmw_pvscsi: Failed to map direct data buffer for DMA.\n");
                        return -ENOMEM;
                }
@@ -725,7 +725,7 @@ static int pvscsi_queue_ring(struct pvscsi_adapter *adapter,
                                cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
                                DMA_FROM_DEVICE);
                if (dma_mapping_error(&adapter->dev->dev, ctx->sensePA)) {
-                       scmd_printk(KERN_ERR, cmd,
+                       scmd_printk(KERN_DEBUG, cmd,
                                    "vmw_pvscsi: Failed to map sense buffer for DMA.\n");
                        ctx->sensePA = 0;
                        return -ENOMEM;