AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

mtd: OneNAND: Fix loop hang when DMA error at Samsung SoCs

Browse Source 
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>
This commit is contained in:
Kyungmin Park 2010-08-27 11:55:37 +09:00 committed by David Woodhouse
parent 9aba97ad00
commit 53d1e137d5
1 changed files with 5 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/mtd/onenand/samsung.c
View File

@ -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;