i2c: Check for ACPI resource conflicts

Check for ACPI resource conflicts in i2c bus drivers. I've included
all recent SMBus master drivers for PC hardware.

I've voluntarily left out:
* Drivers that don't run on PCs: they can't conflict with ACPI.
* Bit-banged bus device drivers: it's very unlikely that ACPI would
  deal with such buses.

Signed-off-by: Jean Delvare <jdelvare@suse.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-amd8111.c b/drivers/i2c/busses/i2c-amd8111.c
index 0e18fe846010..3972208876b3 100644
--- a/drivers/i2c/busses/i2c-amd8111.c
+++ b/drivers/i2c/busses/i2c-amd8111.c
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/i2c.h>
 #include <linux/delay.h>
+#include <linux/acpi.h>
 #include <asm/io.h>
 
 MODULE_LICENSE("GPL");
@@ -374,6 +375,10 @@ static int __devinit amd8111_probe(struct pci_dev *dev,
         smbus->base = pci_resource_start(dev, 0);
         smbus->size = pci_resource_len(dev, 0);
 
+        error = acpi_check_resource_conflict(&dev->resource[0]);
+        if (error)
+                goto out_kfree;
+
         if (!request_region(smbus->base, smbus->size, amd8111_driver.name)) {
                 error = -EBUSY;
                 goto out_kfree;