linux-kernel - [PATCH] dmaengine: ioat: fixing the wrong chancnt

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Message-Id: <20230811081645.1768047-1-yajun.deng@linux.dev>
Date:   Fri, 11 Aug 2023 16:16:45 +0800
From:   Yajun Deng <yajun.deng@...ux.dev>
To:     vkoul@...nel.org, bhelgaas@...gle.com, dave.jiang@...el.com
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yajun Deng <yajun.deng@...ux.dev>
Subject: [PATCH] dmaengine: ioat: fixing the wrong chancnt

The chancnt would be updated in __dma_async_device_channel_register(),
but it was assigned in ioat_enumerate_channels(). Therefore chancnt has
the wrong value.

Clear chancnt before calling dma_async_device_register().

Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>
---
 drivers/dma/ioat/init.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
index c4602bfc9c74..928fc8a83a36 100644
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -536,8 +536,11 @@ static int ioat_probe(struct ioatdma_device *ioat_dma)
 
 static int ioat_register(struct ioatdma_device *ioat_dma)
 {
-	int err = dma_async_device_register(&ioat_dma->dma_dev);
+	int err;
+
+	ioat_dma->dma_dev.chancnt = 0;
 
+	err = dma_async_device_register(&ioat_dma->dma_dev);
 	if (err) {
 		ioat_disable_interrupts(ioat_dma);
 		dma_pool_destroy(ioat_dma->completion_pool);
-- 
2.25.1