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i2c-pca-isa: Add access check to legacy ioports

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When probing i2c-pca-isa writes to legacy ioports, which crashes the kernel
if there is no device at that port.
This patch adds a check_legacy_ioport call, so probe fails gracefully
and thus prevents the oops.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Christian Krafft 2008-02-24 20:03:42 +01:00 committed by Jean Delvare
parent 9e39ffeff6
commit 104cb574fe
1 changed files with 7 additions and 0 deletions
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7
drivers/i2c/busses/i2c-pca-isa.c
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@ -125,6 +125,13 @@ static int __devinit pca_isa_probe(struct device *dev, unsigned int id)
dev_info(dev, "i/o base %#08lx. irq %d\n", base, irq);
#ifdef CONFIG_PPC_MERGE
if (check_legacy_ioport(base)) {
dev_err(dev, "I/O address %#08lx is not available\n", base);
goto out;
}
#endif
if (!request_region(base, IO_SIZE, "i2c-pca-isa")) {
dev_err(dev, "I/O address %#08lx is in use\n", base);
goto out;