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authorDavid S. Miller <davem@davemloft.net>2020-01-26 10:40:21 +0100
committerDavid S. Miller <davem@davemloft.net>2020-01-26 10:40:21 +0100
commit4d8773b68e83558025303f266070b31bc4101e73 (patch)
tree151cafa469fbc6a411d36b58ab802f67869cc0bb /drivers/net/slip
parent3333e50b64fe30b7e53cf02456a2f567f689ae4f (diff)
parent2821e26f3a0a3872184581caac8115bb02641941 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Minor conflict in mlx5 because changes happened to code that has moved meanwhile. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/slip')
-rw-r--r--drivers/net/slip/slip.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c
index 317d3a8df316..6f4d7ba8b109 100644
--- a/drivers/net/slip/slip.c
+++ b/drivers/net/slip/slip.c
@@ -452,9 +452,16 @@ static void slip_transmit(struct work_struct *work)
*/
static void slip_write_wakeup(struct tty_struct *tty)
{
- struct slip *sl = tty->disc_data;
+ struct slip *sl;
+
+ rcu_read_lock();
+ sl = rcu_dereference(tty->disc_data);
+ if (!sl)
+ goto out;
schedule_work(&sl->tx_work);
+out:
+ rcu_read_unlock();
}
static void sl_tx_timeout(struct net_device *dev, unsigned int txqueue)
@@ -882,10 +889,11 @@ static void slip_close(struct tty_struct *tty)
return;
spin_lock_bh(&sl->lock);
- tty->disc_data = NULL;
+ rcu_assign_pointer(tty->disc_data, NULL);
sl->tty = NULL;
spin_unlock_bh(&sl->lock);
+ synchronize_rcu();
flush_work(&sl->tx_work);
/* VSV = very important to remove timers */