[SCSI] aic7xxx: 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>
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index 282aff6..42ad48e 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -1398,12 +1398,18 @@
return SCSI_MLQUEUE_DEVICE_BUSY;
}
+ nseg = scsi_dma_map(cmd);
+ if (nseg < 0)
+ return SCSI_MLQUEUE_HOST_BUSY;
+
/*
* Get an scb to use.
*/
scb = ahc_get_scb(ahc);
- if (!scb)
+ if (!scb) {
+ scsi_dma_unmap(cmd);
return SCSI_MLQUEUE_HOST_BUSY;
+ }
scb->io_ctx = cmd;
scb->platform_data->dev = dev;
@@ -1464,8 +1470,6 @@
ahc_set_sense_residual(scb, 0);
scb->sg_count = 0;
- nseg = scsi_dma_map(cmd);
- BUG_ON(nseg < 0);
if (nseg > 0) {
struct ahc_dma_seg *sg;
struct scatterlist *cur_seg;