tree: https://github.com/awilliam/linux-vfio.git next
head: f54e0bcf65bf7d2015e1aa1c6353e5feb71c3654
commit: f54e0bcf65bf7d2015e1aa1c6353e5feb71c3654 [15/15] vfio: Include No-IOMMU
mode
coccinelle warnings: (new ones prefixed by >>)
>> drivers/vfio/vfio.c:1002:32-35: ERROR: driver is NULL but dereferenced.
vim +1002 drivers/vfio/vfio.c
0b43c082 Alex Williamson 2013-04-29 986
down_read(&container->group_lock);
0b43c082 Alex Williamson 2013-04-29 987
0b43c082 Alex Williamson 2013-04-29 988 driver =
container->iommu_driver;
0b43c082 Alex Williamson 2013-04-29 989
cba3345c Alex Williamson 2012-07-31 990 switch (arg) {
cba3345c Alex Williamson 2012-07-31 991 /* No base extensions
yet */
cba3345c Alex Williamson 2012-07-31 992 default:
cba3345c Alex Williamson 2012-07-31 993 /*
cba3345c Alex Williamson 2012-07-31 994 * If no driver is set,
poll all registered drivers for
cba3345c Alex Williamson 2012-07-31 995 * extensions and
return the first positive result. If
cba3345c Alex Williamson 2012-07-31 996 * a driver is already
set, further queries will be passed
cba3345c Alex Williamson 2012-07-31 997 * only to that driver.
cba3345c Alex Williamson 2012-07-31 998 */
cba3345c Alex Williamson 2012-07-31 999 if (!driver) {
cba3345c Alex Williamson 2012-07-31 1000
mutex_lock(&vfio.iommu_drivers_lock);
f54e0bcf Alex Williamson 2015-10-15 1001
vfio_for_each_iommu_driver(container, driver) {
cba3345c Alex Williamson 2012-07-31 @1002 if
(!try_module_get(driver->ops->owner))
cba3345c Alex Williamson 2012-07-31 1003
continue;
cba3345c Alex Williamson 2012-07-31 1004
cba3345c Alex Williamson 2012-07-31 1005 ret =
driver->ops->ioctl(NULL,
cba3345c Alex Williamson 2012-07-31 1006
VFIO_CHECK_EXTENSION,
cba3345c Alex Williamson 2012-07-31 1007
arg);
cba3345c Alex Williamson 2012-07-31 1008
module_put(driver->ops->owner);
cba3345c Alex Williamson 2012-07-31 1009 if (ret
> 0)
cba3345c Alex Williamson 2012-07-31 1010
break;
:::::: The code at line 1002 was first introduced by commit
:::::: cba3345cc494ad286ca8823f44b2c16cae496679 vfio: VFIO core
:::::: TO: Alex Williamson <alex.william...@redhat.com>
:::::: CC: Alex Williamson <alex.william...@redhat.com>
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