Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
i2c-pca-isa: Add access check to legacy ioports
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>
authored by
Christian Krafft
and committed by
Jean Delvare
104cb574
9e39ffef
+7
+7
drivers/i2c/busses/i2c-pca-isa.c
+7
drivers/i2c/busses/i2c-pca-isa.c
···
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dev_info(dev, "i/o base %#08lx. irq %d\n", base, irq);
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+
#ifdef CONFIG_PPC_MERGE
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if (check_legacy_ioport(base)) {
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dev_err(dev, "I/O address %#08lx is not available\n", base);
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goto out;
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}
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#endif
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+
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if (!request_region(base, IO_SIZE, "i2c-pca-isa")) {
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dev_err(dev, "I/O address %#08lx is in use\n", base);
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goto out;