diff options
| author | Kyungmin Park <kyungmin.park@samsung.com> | 2010-08-27 06:55:37 +0400 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2010-09-13 11:49:45 +0400 |
| commit | 53d1e137d5ddd8a1c5ec54c5375cb2832e1cbcd1 (patch) | |
| tree | f053b9d0e773e2d379f79834630c1c1853e2258a /drivers/mtd/onenand/samsung.c | |
| parent | 9aba97ad004ed0cde9747a9daf5b1484edb746cd (diff) | |
| download | linux-53d1e137d5ddd8a1c5ec54c5375cb2832e1cbcd1.tar.xz | |
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/samsung.c')
| -rw-r--r-- | drivers/mtd/onenand/samsung.c | 11 |
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) do { status = readl(base + S5PC110_DMA_TRANS_STATUS); + if (status & S5PC110_DMA_TRANS_STATUS_TE) { + writel(S5PC110_DMA_TRANS_CMD_TEC, + base + S5PC110_DMA_TRANS_CMD); + return -EIO; + } } while (!(status & S5PC110_DMA_TRANS_STATUS_TD)); - if (status & S5PC110_DMA_TRANS_STATUS_TE) { - writel(S5PC110_DMA_TRANS_CMD_TEC, base + S5PC110_DMA_TRANS_CMD); - writel(S5PC110_DMA_TRANS_CMD_TDC, base + S5PC110_DMA_TRANS_CMD); - return -EIO; - } - writel(S5PC110_DMA_TRANS_CMD_TDC, base + S5PC110_DMA_TRANS_CMD); return 0; |