lkml.org 
[lkml]   [2019]   [Mar]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] dma: ti: fix a missing check in omap_dma_prep_dma_cyclic
Date
It is invalid when "buf_len" is not aligned with "period_len".

The fix adds a check for the alignment.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
---
drivers/dma/ti/omap-dma.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/dma/ti/omap-dma.c b/drivers/dma/ti/omap-dma.c
index a4a931ddf6f6..5f0ce1975e52 100644
--- a/drivers/dma/ti/omap-dma.c
+++ b/drivers/dma/ti/omap-dma.c
@@ -1065,6 +1065,9 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic(
unsigned es;
u32 burst;

+ if (buf_len % period_len)
+ return NULL;
+
if (dir == DMA_DEV_TO_MEM) {
dev_addr = c->cfg.src_addr;
dev_width = c->cfg.src_addr_width;
--
2.17.1
\
 
 \ /
  Last update: 2019-03-23 23:41    [W:0.030 / U:0.624 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site