From: Yang Yingliang yangyingliang@huawei.com
[ Upstream commit 6b3c74550224c3be24c4cf6ab8c333602b458bff ]
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@huawei.com Reviewed-by: Stephan Gerhold stephan@gerhold.net Link: https://lore.kernel.org/r/20220319032450.3288224-1-yangyingliang@huawei.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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);