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authorKyungmin Park <kyungmin.park@samsung.com>2010-08-26 22:55:37 -0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-09-13 03:49:45 -0400
commit53d1e137d5ddd8a1c5ec54c5375cb2832e1cbcd1 (patch)
treef053b9d0e773e2d379f79834630c1c1853e2258a /drivers/mtd/onenand
parent9aba97ad004ed0cde9747a9daf5b1484edb746cd (diff)
mtd: OneNAND: Fix loop hang when DMA error at Samsung SoCs
When DMA error occurs. it's loop hang since it can't exit the loop. and it's the right DMA handling code as Spec. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/onenand')
-rw-r--r--drivers/mtd/onenand/samsung.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/mtd/onenand/samsung.c b/drivers/mtd/onenand/samsung.c
index 094dfcbe2347..a460f1b748c2 100644
--- a/drivers/mtd/onenand/samsung.c
+++ b/drivers/mtd/onenand/samsung.c
@@ -554,14 +554,13 @@ static int s5pc110_dma_ops(void *dst, void *src, size_t count, int direction)
554 554
555 do { 555 do {
556 status = readl(base + S5PC110_DMA_TRANS_STATUS); 556 status = readl(base + S5PC110_DMA_TRANS_STATUS);
557 if (status & S5PC110_DMA_TRANS_STATUS_TE) {
558 writel(S5PC110_DMA_TRANS_CMD_TEC,
559 base + S5PC110_DMA_TRANS_CMD);
560 return -EIO;
561 }
557 } while (!(status & S5PC110_DMA_TRANS_STATUS_TD)); 562 } while (!(status & S5PC110_DMA_TRANS_STATUS_TD));
558 563
559 if (status & S5PC110_DMA_TRANS_STATUS_TE) {
560 writel(S5PC110_DMA_TRANS_CMD_TEC, base + S5PC110_DMA_TRANS_CMD);
561 writel(S5PC110_DMA_TRANS_CMD_TDC, base + S5PC110_DMA_TRANS_CMD);
562 return -EIO;
563 }
564
565 writel(S5PC110_DMA_TRANS_CMD_TDC, base + S5PC110_DMA_TRANS_CMD); 564 writel(S5PC110_DMA_TRANS_CMD_TDC, base + S5PC110_DMA_TRANS_CMD);
566 565
567 return 0; 566 return 0;