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| author | Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com> | 2011-10-11 21:43:21 +0900 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@linux.intel.com> | 2011-10-11 22:24:36 +0530 |
| commit | c43f1508686e8e4746012bf87995085eeb0f5307 (patch) | |
| tree | 22b243bb93d07b2107c72671dbd60ee3bdf59886 /drivers/dma/pch_dma.c | |
| parent | f80befe081576219379debf6611f02c9f3b01c41 (diff) | |
| download | linux-c43f1508686e8e4746012bf87995085eeb0f5307.tar.gz linux-c43f1508686e8e4746012bf87995085eeb0f5307.tar.bz2 linux-c43f1508686e8e4746012bf87995085eeb0f5307.zip | |
pch_dma: Fix suspend issue
Currently, executing suspend/hibernation,
memory access violation occurs.
In pch_dma_save_regs() called by suspend(),
you can see the following code.
static void pch_dma_save_regs(struct pch_dma *pd)
{
snip...
list_for_each_entry_safe(chan, _c, &pd->dma.channels, device_node) {
pd_chan = to_pd_chan(chan);
pd->ch_regs[i].dev_addr = channel_readl(pd_chan, DEV_ADDR);
pd->ch_regs[i].mem_addr = channel_readl(pd_chan, MEM_ADDR);
pd->ch_regs[i].size = channel_readl(pd_chan, SIZE);
pd->ch_regs[i].next = channel_readl(pd_chan, NEXT);
i++;
}
}
Max loop count is 12 defined at pci_table.
So, this caused memory access violation.
This patch fixes the issue
- Modify array size (MAX_CHAN_NR)
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'drivers/dma/pch_dma.c')
| -rw-r--r-- | drivers/dma/pch_dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c index 5b65362024fd..6abe5ac3bd5e 100644 --- a/drivers/dma/pch_dma.c +++ b/drivers/dma/pch_dma.c @@ -60,7 +60,7 @@ #define DMA_DESC_FOLLOW_WITHOUT_IRQ 0x2 #define DMA_DESC_FOLLOW_WITH_IRQ 0x3 -#define MAX_CHAN_NR 8 +#define MAX_CHAN_NR 12 #define DMA_MASK_CTL0_MODE 0x33333333 #define DMA_MASK_CTL2_MODE 0x00003333 |