commit 2505873afe510d8db05665684c056ac8f0b24563
author FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Sun Mar 09 22:50:40 2008 +0900
committer James Bottomley <James.Bottomley@HansenPartnership.com> Mon Apr 07 12:15:44 2008 -0500
tree 94de8c445c8e0d341d0f1765f651ff6a728cea92
parent 647b24256241e144fe8369244da1730b577211e9

[SCSI] aic79xx: fix IOMMU mapping failure handling

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/aic7xxx/aic79xx_osm.c

diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index 72fccd9..0081aa3 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -1413,6 +1413,10 @@
 	unsigned long flags;
 	int nseg;
 
+	nseg = scsi_dma_map(cmd);
+	if (nseg < 0)
+		return SCSI_MLQUEUE_HOST_BUSY;
+
 	ahd_lock(ahd, &flags);
 
 	/*
@@ -1430,6 +1434,7 @@
 	if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
 		ahd->flags |= AHD_RESOURCE_SHORTAGE;
 		ahd_unlock(ahd, &flags);
+		scsi_dma_unmap(cmd);
 		return SCSI_MLQUEUE_HOST_BUSY;
 	}
 
@@ -1485,8 +1490,6 @@
 	ahd_set_sense_residual(scb, 0);
 	scb->sg_count = 0;
 
-	nseg = scsi_dma_map(cmd);
-	BUG_ON(nseg < 0);
 	if (nseg > 0) {
 		void *sg = scb->sg_list;
 		struct scatterlist *cur_seg;