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-rw-r--r--debian/patches-rt/0142-atm-eni-Use-tasklet_disable_in_atomic-in-the-send-ca.patch42
1 files changed, 42 insertions, 0 deletions
diff --git a/debian/patches-rt/0142-atm-eni-Use-tasklet_disable_in_atomic-in-the-send-ca.patch b/debian/patches-rt/0142-atm-eni-Use-tasklet_disable_in_atomic-in-the-send-ca.patch
new file mode 100644
index 000000000..45236c9da
--- /dev/null
+++ b/debian/patches-rt/0142-atm-eni-Use-tasklet_disable_in_atomic-in-the-send-ca.patch
@@ -0,0 +1,42 @@
+From f8cac7fb539abd4d961c942dde93a04956f9615d Mon Sep 17 00:00:00 2001
+From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Date: Tue, 9 Mar 2021 09:42:14 +0100
+Subject: [PATCH 142/323] atm: eni: Use tasklet_disable_in_atomic() in the
+ send() callback
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz
+
+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
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ drivers/atm/eni.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/atm/eni.c b/drivers/atm/eni.c
+index 9fcc49be499f..a31ffe16e626 100644
+--- a/drivers/atm/eni.c
++++ b/drivers/atm/eni.c
+@@ -2056,7 +2056,7 @@ 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;
+--
+2.43.0
+