From: Taekki Kim <taekki.kim@samsung.com>
Date: Mon, 9 Jan 2017 04:07:34 +0000 (+0900)
Subject: dma: pl330: add critical section for list operation
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=74323c347abc6e7cdfeb5b7dba657db645b909b3;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

dma: pl330: add critical section for list operation

Change-Id: I8505ac36fcc13a9d0c376bd4dba7fae6558f50cb
Signed-off-by: Taekki Kim <taekki.kim@samsung.com>
---

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 48d5e03cd318..b5268355ea94 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2169,7 +2169,9 @@ static void pl330_tasklet(unsigned long data)
 			}
 		} else {
 			desc->status = FREE;
+			spin_lock(&pch->dmac->pool_lock);
 			list_move_tail(&desc->node, &pch->dmac->desc_pool);
+			spin_unlock(&pch->dmac->pool_lock);
 		}
 
 		dma_descriptor_unmap(&desc->txd);