Unverified Commit 82566893 authored Apr 03, 2025 by openeuler-ci-bot Committed by Gitee Apr 03, 2025

!15763 dmaengine: Fix double increment of client_count in dma_chan_get()

Merge Pull Request from: @ci-robot 
 
PR sync from: Xiaomeng Zhang <zhangxiaomeng13@huawei.com>
https://mailweb.openeuler.org/archives/list/kernel@openeuler.org/message/EDNWLCNYWHW3VWTDMV4RHB7CW266JPCX/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBWVX7 
 
Link:https://gitee.com/openeuler/kernel/pulls/15763

 

Reviewed-by: Ye Weihua <yeweihua4@huawei.com>
Reviewed-by: Yuan Can <yuancan@huawei.com>
Signed-off-by: Yuan Can <yuancan@huawei.com>

parents 9df74c79 10f50a2c

drivers/dma/dmaengine.c

+4 −3

Original line number	Diff line number	Diff line
		@@ -223,7 +223,8 @@ static int dma_chan_get(struct dma_chan *chan)
		/* The channel is already in use, update client count */
		if (chan->client_count) {
		__module_get(owner);
		goto out;
		chan->client_count++;
		return 0;
		}

		if (!try_module_get(owner))
		@@ -236,11 +237,11 @@ static int dma_chan_get(struct dma_chan *chan)
		goto err_out;
		}

		chan->client_count++;

		if (!dma_has_cap(DMA_PRIVATE, chan->device->cap_mask))
		balance_ref_count(chan);

		out:
		chan->client_count++;
		return 0;

		err_out: