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mmc: sdhci-pci: Fix error case in sdhci_pci_probe_slot()

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If pci_ioremap_bar() fails during probe, we "goto release;" and free the
host, but then we return 0 -- which tells sdhci_pci_probe() that the probe
succeeded.  Since we think the probe succeeded, when we unload sdhci we'll
go to sdhci_pci_remove_slot() and it will try to dereference slot->host,
which is now NULL because we freed it in the error path earlier.

The patch simply sets ret appropriately, so that sdhci_pci_probe() will
detect the failure immediately and bail out.

Signed-off-by: Chris Ball <cjb@laptop.org>
Cc: <stable@kernel.org>
This commit is contained in:
Chris Ball 2011-03-29 00:46:12 -04:00
parent e8dad69408
commit 9fdcdbb0d8
1 changed files with 1 additions and 0 deletions
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drivers/mmc/host/sdhci-pci.c
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@ -957,6 +957,7 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
host->ioaddr = pci_ioremap_bar(pdev, bar);
if (!host->ioaddr) {
dev_err(&pdev->dev, "failed to remap registers\n");
ret = -ENOMEM;
goto release;
}