| From | Luis Henriques <> | Subject | [PATCH 113/115] pch_dma: Use GFP_ATOMIC because called from interrupt context | Date | Mon, 20 May 2013 11:51:53 +0100 |
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3.5.7.13 -stable review patch. If anyone has any objections, please let me know.
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From: Tomoya MORINAGA <tomoya.rohm@gmail.com>
commit 5c1ef59168c485318e40ba485c1eba57d81d0faa upstream.
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> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/dma/pch_dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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++; -- 1.8.1.2
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