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scsi: fcoe: move fcoe_interface_remove() out of fcoe_interface_cleanup() 

This closes a possible race condition in _fcoe_create() where we drop
the rtnl_lock() before calling fcoe_interface_remove().

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke 2017-09-15 13:12:12 +02:00 committed by Martin K. Petersen
parent 2a8ee61685
commit 9eed785b02
1 changed files with 7 additions and 5 deletions
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12
drivers/scsi/fcoe/fcoe.c
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@ -501,11 +501,6 @@ static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
struct net_device *netdev = fcoe->netdev;
struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
rtnl_lock();
if (!fcoe->removed)
fcoe_interface_remove(fcoe);
rtnl_unlock();
/* Release the self-reference taken during fcoe_interface_create() */
/* tear-down the FCoE controller */
fcoe_ctlr_destroy(fip);
@ -2140,6 +2135,11 @@ static void fcoe_destroy_work(struct work_struct *work)
cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
fcoe_if_destroy(port->lport);
rtnl_lock();
if (!fcoe->removed)
fcoe_interface_remove(fcoe);
rtnl_unlock();
fcoe_interface_cleanup(fcoe);
mutex_unlock(&fcoe_config_mutex);
@ -2254,6 +2254,8 @@ static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode,
printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
netdev->name);
rc = -EIO;
if (!fcoe->removed)
fcoe_interface_remove(fcoe);
rtnl_unlock();
fcoe_interface_cleanup(fcoe);
mutex_unlock(&fcoe_config_mutex);