linux-kernel - [PATCH 1/2] dmaengine: xilinx

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Date:   Fri, 24 Jun 2022 12:05:38 +0530
From:   Swati Agarwal <swati.agarwal@...inx.com>
To:     <vkoul@...nel.org>, <lars@...afoo.de>, <adrianml@...mnos.upm.es>,
        <libaokun1@...wei.com>, <marex@...x.de>
CC:     <dmaengine@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <swati.agarwal@...inx.com>,
        <harini.katakam@...inx.com>, <radhey.shyam.pandey@...inx.com>,
        <michal.simek@...inx.com>
Subject: [PATCH 1/2] dmaengine: xilinx_dma: Fix probe error cleanup

When probe fails remove dma channel resources and disable clocks in
accordance with the order of resources allocated .

Add missing cleanup in devm_platform_ioremap_resource(), xlnx,num-fstores
property.

Signed-off-by: Swati Agarwal <swati.agarwal@...inx.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
---
 drivers/dma/xilinx/xilinx_dma.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index cd62bbb50e8b..fbf341e8c36f 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -3160,8 +3160,10 @@ static int xilinx_dma_probe(struct platform_device *pdev)
 
 	/* Request and map I/O memory */
 	xdev->regs = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(xdev->regs))
-		return PTR_ERR(xdev->regs);
+	if (IS_ERR(xdev->regs)) {
+		err = PTR_ERR(xdev->regs);
+		goto disable_clks;
+	}
 
 	/* Retrieve the DMA engine properties from the device tree */
 	xdev->max_buffer_len = GENMASK(XILINX_DMA_MAX_TRANS_LEN_MAX - 1, 0);
@@ -3190,7 +3192,7 @@ static int xilinx_dma_probe(struct platform_device *pdev)
 		if (err < 0) {
 			dev_err(xdev->dev,
 				"missing xlnx,num-fstores property\n");
-			return err;
+			goto disable_clks;
 		}
 
 		err = of_property_read_u32(node, "xlnx,flush-fsync",
@@ -3259,7 +3261,7 @@ static int xilinx_dma_probe(struct platform_device *pdev)
 	for_each_child_of_node(node, child) {
 		err = xilinx_dma_child_probe(xdev, child);
 		if (err < 0)
-			goto disable_clks;
+			goto error;
 	}
 
 	if (xdev->dma_config->dmatype == XDMA_TYPE_VDMA) {
@@ -3294,12 +3296,12 @@ static int xilinx_dma_probe(struct platform_device *pdev)
 
 	return 0;
 
-disable_clks:
-	xdma_disable_allclks(xdev);
 error:
 	for (i = 0; i < xdev->dma_config->max_channels; i++)
 		if (xdev->chan[i])
 			xilinx_dma_chan_remove(xdev->chan[i]);
+disable_clks:
+	xdma_disable_allclks(xdev);
 
 	return err;
 }
-- 
2.17.1