Commit 1b647a16 authored Aug 18, 2015 by Linus Torvalds

slave-dma

Pull dmaengine fix from Vinod Koul:
 "We recently found issue with dma_request_slave_channel() API causing
  privatecnt value to go bad.  This is fixed by balancing the privatecnt"

* tag 'dmaengine-fix-4.2-rc8' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: fix balance of privatecnt inc/dec operations

parents f4566ed0 05aa1a77

drivers/dma/dmaengine.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -689,6 +689,10 @@ struct dma_chan dma_request_slave_channel(struct device dev,
		struct dma_chan *ch = dma_request_slave_channel_reason(dev, name);
		if (IS_ERR(ch))
		return NULL;

		dma_cap_set(DMA_PRIVATE, ch->device->cap_mask);
		ch->device->privatecnt++;

		return ch;
		}
		EXPORT_SYMBOL_GPL(dma_request_slave_channel);