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net: axienet: Fix devm_ioremap_resource return value check

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Value returned by devm_ioremap_resource() was checked for non-NULL but
devm_ioremap_resource() returns IOMEM_ERR_PTR, not NULL. In case of
error this could lead to dereference of ERR_PTR.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Cc: <stable@vger.kernel.org>
Fixes: 46aa27df88 ("net: axienet: Use devm_* calls")
Reviewed-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Krzysztof Kozlowski 2015-07-09 22:21:20 +09:00 committed by David S. Miller
parent fc5778ca3f
commit fcc028c106
1 changed files with 4 additions and 4 deletions
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8
drivers/net/ethernet/xilinx/xilinx_axienet_main.c
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@ -1530,9 +1530,9 @@ static int axienet_probe(struct platform_device *pdev)
/* Map device registers */
ethres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
lp->regs = devm_ioremap_resource(&pdev->dev, ethres);
if (!lp->regs) {
if (IS_ERR(lp->regs)) {
dev_err(&pdev->dev, "could not map Axi Ethernet regs.\n");
ret = -ENOMEM;
ret = PTR_ERR(lp->regs);
goto free_netdev;
}
@ -1599,9 +1599,9 @@ static int axienet_probe(struct platform_device *pdev)
goto free_netdev;
}
lp->dma_regs = devm_ioremap_resource(&pdev->dev, &dmares);
if (!lp->dma_regs) {
if (IS_ERR(lp->dma_regs)) {
dev_err(&pdev->dev, "could not map DMA regs\n");
ret = -ENOMEM;
ret = PTR_ERR(lp->dma_regs);
goto free_netdev;
}
lp->rx_irq = irq_of_parse_and_map(np, 1);