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IB/nes: Fix a race condition in nes_inetaddr_event() 

This patch has been compile-tested only.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Faisal Latif <faisal.latif@intel.com>
Acked-by: Faisal Latif <fasial.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bart Van Assche 2017-10-11 10:49:12 -07:00 committed by Doug Ledford
parent fd9e04d6d2
commit 52adbb6914
1 changed files with 9 additions and 4 deletions
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13
drivers/infiniband/hw/nes/nes.c
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@ -178,11 +178,16 @@ static int nes_inetaddr_event(struct notifier_block *notifier,
/* fall through */
case NETDEV_CHANGEADDR:
/* Add the address to the IP table */
if (upper_dev)
nesvnic->local_ipaddr =
((struct in_device *)upper_dev->ip_ptr)->ifa_list->ifa_address;
else
if (upper_dev) {
struct in_device *in;
rcu_read_lock();
in = __in_dev_get_rcu(upper_dev);
nesvnic->local_ipaddr = in->ifa_list->ifa_address;
rcu_read_unlock();
} else {
nesvnic->local_ipaddr = ifa->ifa_address;
}
nes_write_indexed(nesdev,
NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)),