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-rw-r--r--debian/patches-rt/0144-firewire-ohci-Use-tasklet_disable_in_atomic-where-re.patch61
1 files changed, 61 insertions, 0 deletions
diff --git a/debian/patches-rt/0144-firewire-ohci-Use-tasklet_disable_in_atomic-where-re.patch b/debian/patches-rt/0144-firewire-ohci-Use-tasklet_disable_in_atomic-where-re.patch
new file mode 100644
index 000000000..184d80276
--- /dev/null
+++ b/debian/patches-rt/0144-firewire-ohci-Use-tasklet_disable_in_atomic-where-re.patch
@@ -0,0 +1,61 @@
+From 090a450216e555382abe0be8e2941ecfcc527c44 Mon Sep 17 00:00:00 2001
+From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Date: Tue, 9 Mar 2021 09:42:16 +0100
+Subject: [PATCH 144/323] firewire: ohci: Use tasklet_disable_in_atomic() where
+ required
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz
+
+tasklet_disable() is invoked in several places. Some of them are in atomic
+context which prevents a conversion of tasklet_disable() to a sleepable
+function.
+
+The atomic callchains are:
+
+ ar_context_tasklet()
+ ohci_cancel_packet()
+ tasklet_disable()
+
+ ...
+ ohci_flush_iso_completions()
+ tasklet_disable()
+
+The invocation of tasklet_disable() from at_context_flush() is always in
+preemptible context.
+
+Use tasklet_disable_in_atomic() for the two invocations in
+ohci_cancel_packet() and ohci_flush_iso_completions().
+
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
+Cc: linux1394-devel@lists.sourceforge.net
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ drivers/firewire/ohci.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
+index 9811c40956e5..17c9d825188b 100644
+--- a/drivers/firewire/ohci.c
++++ b/drivers/firewire/ohci.c
+@@ -2545,7 +2545,7 @@ static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet)
+ struct driver_data *driver_data = packet->driver_data;
+ int ret = -ENOENT;
+
+- tasklet_disable(&ctx->tasklet);
++ tasklet_disable_in_atomic(&ctx->tasklet);
+
+ if (packet->ack != 0)
+ goto out;
+@@ -3465,7 +3465,7 @@ static int ohci_flush_iso_completions(struct fw_iso_context *base)
+ struct iso_context *ctx = container_of(base, struct iso_context, base);
+ int ret = 0;
+
+- tasklet_disable(&ctx->context.tasklet);
++ tasklet_disable_in_atomic(&ctx->context.tasklet);
+
+ if (!test_and_set_bit_lock(0, &ctx->flushing_completions)) {
+ context_tasklet((unsigned long)&ctx->context);
+--
+2.43.0
+