From: Robert Jennings <rcj@linux.vnet.ibm.com>
Date: Thu, 22 Jan 2009 19:40:09 +0000 (-0600)
Subject: [SCSI] ibmvscsi: Correct DMA mapping leak
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=e637d553199e264327714da437e6c808f2f4b096;p=deliverable%2Flinux.git

[SCSI] ibmvscsi: Correct DMA mapping leak

The ibmvscsi client driver is not unmapping the SCSI command after
encountering a DMA mapping error while trying to map an indirect
scattergather list for the event pool.  This leads to a leak of DMA
entitlement that could result in the device failing future DMA operations
in a CMO environment.

Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
---

diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 74d07d137dae..c9aa7611e408 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -432,6 +432,7 @@ static int map_sg_data(struct scsi_cmnd *cmd,
 				sdev_printk(KERN_ERR, cmd->device,
 				            "Can't allocate memory "
 				            "for indirect table\n");
+			scsi_dma_unmap(cmd);
 			return 0;
 		}
 	}