atm: eni: Use tasklet_disable_in_atomic() in the send() callback

The atmdev_ops::send callback which calls tasklet_disable() is invoked with
bottom halfs disabled from net_device_ops::ndo_start_xmit(). All other
invocations of tasklet_disable() in this driver happen in preemptible
context.

Change the send() call to use tasklet_disable_in_atomic() which allows
tasklet_disable() to be made sleepable once the remaining atomic context
usage sites are cleaned up.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210309084242.415583839@linutronix.de

diff --git a/drivers/atm/eni.c b/drivers/atm/eni.c
index 316a994..e96a4e8 100644 (file)
--- a/drivers/atm/eni.c
+++ b/drivers/atm/eni.c
@@ -2054,7 +2054,7 @@ static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
        }
        submitted++;
        ATM_SKB(skb)->vcc = vcc;
-       tasklet_disable(&ENI_DEV(vcc->dev)->task);
+       tasklet_disable_in_atomic(&ENI_DEV(vcc->dev)->task);
        res = do_tx(skb);
        tasklet_enable(&ENI_DEV(vcc->dev)->task);
        if (res == enq_ok) return 0;