diff options
Diffstat (limited to 'debian/patches-rt/0013-firewire-ohci-Use-tasklet_disable_in_atomic-where-re.patch')
-rw-r--r-- | debian/patches-rt/0013-firewire-ohci-Use-tasklet_disable_in_atomic-where-re.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/debian/patches-rt/0013-firewire-ohci-Use-tasklet_disable_in_atomic-where-re.patch b/debian/patches-rt/0013-firewire-ohci-Use-tasklet_disable_in_atomic-where-re.patch new file mode 100644 index 000000000..d454c4743 --- /dev/null +++ b/debian/patches-rt/0013-firewire-ohci-Use-tasklet_disable_in_atomic-where-re.patch @@ -0,0 +1,55 @@ +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Tue, 9 Mar 2021 09:42:16 +0100 +Subject: [PATCH 13/20] firewire: ohci: Use tasklet_disable_in_atomic() where + required +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.21-rt34.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(-) + +--- a/drivers/firewire/ohci.c ++++ b/drivers/firewire/ohci.c +@@ -2545,7 +2545,7 @@ static int ohci_cancel_packet(struct fw_ + 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(st + 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); |