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| author | Tomoya MORINAGA <tomoya.rohm@gmail.com> | 2013-02-12 03:25:33 +0100 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2013-04-15 06:21:16 +0200 |
| commit | 5c1ef59168c485318e40ba485c1eba57d81d0faa (patch) | |
| tree | 2faba4d657e7cb9df6d85332a55c5659a01a620e | |
| parent | DMA: PL330: allow submitting 2 requests at a time (diff) | |
| download | linux-5c1ef59168c485318e40ba485c1eba57d81d0faa.tar.xz linux-5c1ef59168c485318e40ba485c1eba57d81d0faa.zip | |
pch_dma: Use GFP_ATOMIC because called from interrupt context
pdc_desc_get() is called from pd_prep_slave_sg, and the function is
called from interrupt context(e.g. Uart driver "pch_uart.c").
In fact, I saw kernel error message.
So, GFP_ATOMIC must be used not GFP_NOIO.
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| -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 d01faeb0f27c..ce3dc3e9688c 100644 --- a/drivers/dma/pch_dma.c +++ b/drivers/dma/pch_dma.c @@ -476,7 +476,7 @@ static struct pch_dma_desc *pdc_desc_get(struct pch_dma_chan *pd_chan) dev_dbg(chan2dev(&pd_chan->chan), "scanned %d descriptors\n", i); if (!ret) { - ret = pdc_alloc_desc(&pd_chan->chan, GFP_NOIO); + ret = pdc_alloc_desc(&pd_chan->chan, GFP_ATOMIC); if (ret) { spin_lock(&pd_chan->lock); pd_chan->descs_allocated++; |