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authorMike Christie <michaelc@cs.wisc.edu>2007-07-26 13:46:47 -0400
committerJames Bottomley <jejb@mulgrave.localdomain>2007-07-27 09:12:54 -0400
commitb6d44fe9582b9d90a0b16f508ac08a90d899bf56 (patch)
tree13b3d0d4f20007939148bda8e6c72e1d0d71cad8
parente07264071f7f2b02a2973cb28d9fdf5eb8866cc1 (diff)
[SCSI] iscsi_tcp: Turn off bounce buffers
It was found by LSI that on setups with large amounts of memory we were bouncing buffers when we did not need to. If the iscsi tcp code touches the data buffer (or a helper does), it will kmap the buffer. iscsi_tcp also does not interact with hardware, so it does not have any hw dma restrictions. This patch sets the bounce buffer settings for our device queue so buffers should not be bounced because of a driver limit. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
-rw-r--r--drivers/scsi/iscsi_tcp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 93034b43effc..a21455d0274c 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -2216,6 +2216,7 @@ static void iscsi_tcp_session_destroy(struct iscsi_cls_session *cls_session)
2216 2216
2217static int iscsi_tcp_slave_configure(struct scsi_device *sdev) 2217static int iscsi_tcp_slave_configure(struct scsi_device *sdev)
2218{ 2218{
2219 blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_ANY);
2219 blk_queue_dma_alignment(sdev->request_queue, 0); 2220 blk_queue_dma_alignment(sdev->request_queue, 0);
2220 return 0; 2221 return 0;
2221} 2222}