Messages in this thread Patch in this message | | | From | Tomoya MORINAGA <> | Subject | [PATCH] pch_dma: Use GFP_ATOMIC because called from interrupt context | Date | Tue, 12 Feb 2013 11:25:33 +0900 |
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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> --- 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 987ab5c..d5cbd44 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++; -- 1.7.4.4
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