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[v2,2/4] scsi: isci: fix dma_unmap_sg() parameter

Message ID 1515033405-37477-3-git-send-email-chenxiang66@hisilicon.com (mailing list archive)
State Deferred
Headers show

Commit Message

chenxiang Jan. 4, 2018, 2:36 a.m. UTC
For function dma_unmap_sg(), the <nents> parameter should be number of
elements in the scatterlist prior to the mapping, not after the mapping.
Fix this usage.

Cc: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Fixes: d9dcb4ba7("isci: unify isci_host and scic_sds_controller")
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
---
 drivers/scsi/isci/request.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index ed197bc..225d947 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -2914,7 +2914,7 @@  static void isci_request_io_request_complete(struct isci_host *ihost,
 					 task->total_xfer_len, task->data_dir);
 		else  /* unmap the sgl dma addresses */
 			dma_unmap_sg(&ihost->pdev->dev, task->scatter,
-				     request->num_sg_entries, task->data_dir);
+				     task->num_scatter, task->data_dir);
 		break;
 	case SAS_PROTOCOL_SMP: {
 		struct scatterlist *sg = &task->smp_task.smp_req;