PCI: Check dynids driver_data value for validity

Only accept dynids whose driver_data value matches one of the driver's
pci_driver_id entries. This prevents the user from accidentally passing
values the drivers do not expect.

Cc: Milton Miller <miltonm@bga.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 0 insertions, 4 deletions

diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c
index 2324780484c0..9f194d9efd91 100644
--- a/drivers/i2c/busses/i2c-viapro.c
+++ b/drivers/i2c/busses/i2c-viapro.c
@@ -332,10 +332,6 @@ static int __devinit vt596_probe(struct pci_dev *pdev,
         unsigned char temp;
         int error = -ENODEV;
 
-        /* driver_data might come from user-space, so check it */
-        if (id->driver_data & 1 || id->driver_data > 0xff)
-                return -EINVAL;
-
         /* Determine the address of the SMBus areas */
         if (force_addr) {
                 vt596_smba = force_addr & 0xfff0;