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[11/14] atm: eni: Use tasklet_disable_in_atomic() in the send() callback

Message ID 20210309084242.415583839@linutronix.de (mailing list archive)
State Not Applicable
Delegated to: Johannes Berg
Headers show
Series tasklets: Replace the spin wait loops and make it RT safe | expand

Commit Message

Thomas Gleixner March 9, 2021, 8:42 a.m. UTC 
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

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>
Cc: Chas Williams <3chas3@gmail.com>
Cc: linux-atm-general@lists.sourceforge.net
Cc: netdev@vger.kernel.org
---
 drivers/atm/eni.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

--- a/drivers/atm/eni.c
+++ b/drivers/atm/eni.c
@@ -2054,7 +2054,7 @@  static int eni_send(struct atm_vcc *vcc,
 	}
 	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;