dmaengine: stm32-dmamux: Fix PM disable depth imbalance in stm32_dmamux_probe

stable inclusion
from stable-v5.10.102
commit 2c35c95d3640979d0f0118b640ddd4b326cf4d81
bugzilla: https://gitee.com/openeuler/kernel/issues/I567K6

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=2c35c95d3640979d0f0118b640ddd4b326cf4d81

--------------------------------

commit e831c7ab upstream.

The pm_runtime_enable will increase power disable depth.
If the probe fails, we should use pm_runtime_disable() to balance
pm_runtime_enable().

Fixes: 4f3ceca2 ("dmaengine: stm32-dmamux: Add PM Runtime support")
Signed-off-by: NMiaoqian Lin <linmq006@gmail.com>
Reviewed-by: NAmelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20220108085336.11992-1-linmq006@gmail.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NYu Liao <liaoyu15@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/dma/stm32-dmamux.c

@@ -292,10 +292,12 @@ static int stm32_dmamux_probe(struct platform_device *pdev)
 	ret = of_dma_router_register(node, stm32_dmamux_route_allocate,
 				     &stm32_dmamux->dmarouter);
 	if (ret)
-		goto err_clk;
+		goto pm_disable;
 
 	return 0;
 
+pm_disable:
+	pm_runtime_disable(&pdev->dev);
 err_clk:
 	clk_disable_unprepare(stm32_dmamux->clk);