linux-kernel - [PATCH -next] net: wwan: qcom_bam_dmux: fix wrong pointer passed to IS

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Message-ID: <20220319032450.3288224-1-yangyingliang@huawei.com>
Date:   Sat, 19 Mar 2022 11:24:50 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>
CC:     <davem@...emloft.net>, <stephan@...hold.net>
Subject: [PATCH -next] net: wwan: qcom_bam_dmux: fix wrong pointer passed to IS_ERR()

It should check dmux->tx after calling dma_request_chan().

Fixes: 21a0ffd9b38c ("net: wwan: Add Qualcomm BAM-DMUX WWAN network driver")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/net/wwan/qcom_bam_dmux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wwan/qcom_bam_dmux.c b/drivers/net/wwan/qcom_bam_dmux.c
index 5dfa2eba6014..17d46f4d2913 100644
--- a/drivers/net/wwan/qcom_bam_dmux.c
+++ b/drivers/net/wwan/qcom_bam_dmux.c
@@ -755,7 +755,7 @@ static int __maybe_unused bam_dmux_runtime_resume(struct device *dev)
 		return 0;
 
 	dmux->tx = dma_request_chan(dev, "tx");
-	if (IS_ERR(dmux->rx)) {
+	if (IS_ERR(dmux->tx)) {
 		dev_err(dev, "Failed to request TX DMA channel: %pe\n", dmux->tx);
 		dmux->tx = NULL;
 		bam_dmux_runtime_suspend(dev);
-- 
2.25.1