6.6-stable patches

added patches:
	input-gpio-keys-fix-a-sleep-while-atomic-with-preempt_rt.patch
	series

diff --git a/queue-6.6/input-gpio-keys-fix-a-sleep-while-atomic-with-preempt_rt.patch b/queue-6.6/input-gpio-keys-fix-a-sleep-while-atomic-with-preempt_rt.patch
new file mode 100644 (file)
index 0000000..f1e9a1a
--- /dev/null
+++ b/queue-6.6/input-gpio-keys-fix-a-sleep-while-atomic-with-preempt_rt.patch
@@ -0,0 +1,68 @@
+From f4a8f561d08e39f7833d4a278ebfb12a41eef15f Mon Sep 17 00:00:00 2001
+From: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
+Date: Fri, 30 May 2025 15:36:43 -0700
+Subject: Input: gpio-keys - fix a sleep while atomic with PREEMPT_RT
+
+From: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
+
+commit f4a8f561d08e39f7833d4a278ebfb12a41eef15f upstream.
+
+When enabling PREEMPT_RT, the gpio_keys_irq_timer() callback runs in
+hard irq context, but the input_event() takes a spin_lock, which isn't
+allowed there as it is converted to a rt_spin_lock().
+
+[ 4054.289999] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48
+[ 4054.290028] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/0
+...
+[ 4054.290195]  __might_resched+0x13c/0x1f4
+[ 4054.290209]  rt_spin_lock+0x54/0x11c
+[ 4054.290219]  input_event+0x48/0x80
+[ 4054.290230]  gpio_keys_irq_timer+0x4c/0x78
+[ 4054.290243]  __hrtimer_run_queues+0x1a4/0x438
+[ 4054.290257]  hrtimer_interrupt+0xe4/0x240
+[ 4054.290269]  arch_timer_handler_phys+0x2c/0x44
+[ 4054.290283]  handle_percpu_devid_irq+0x8c/0x14c
+[ 4054.290297]  handle_irq_desc+0x40/0x58
+[ 4054.290307]  generic_handle_domain_irq+0x1c/0x28
+[ 4054.290316]  gic_handle_irq+0x44/0xcc
+
+Considering the gpio_keys_irq_isr() can run in any context, e.g. it can
+be threaded, it seems there's no point in requesting the timer isr to
+run in hard irq context.
+
+Relax the hrtimer not to use the hard context.
+
+Fixes: 019002f20cb5 ("Input: gpio-keys - use hrtimer for release timer")
+Suggested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
+Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
+Link: https://lore.kernel.org/r/20250528-gpio_keys_preempt_rt-v2-1-3fc55a9c3619@foss.st.com
+Cc: stable@vger.kernel.org
+Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
+[ adjusted context ]
+Signed-off-by: Sasha Levin <sashal@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/input/keyboard/gpio_keys.c |    4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/drivers/input/keyboard/gpio_keys.c
++++ b/drivers/input/keyboard/gpio_keys.c
+@@ -495,7 +495,7 @@ static irqreturn_t gpio_keys_irq_isr(int
+       if (bdata->release_delay)
+               hrtimer_start(&bdata->release_timer,
+                             ms_to_ktime(bdata->release_delay),
+-                            HRTIMER_MODE_REL_HARD);
++                            HRTIMER_MODE_REL);
+ out:
+       spin_unlock_irqrestore(&bdata->lock, flags);
+       return IRQ_HANDLED;
+@@ -632,7 +632,7 @@ static int gpio_keys_setup_key(struct pl
+ 
+               bdata->release_delay = button->debounce_interval;
+               hrtimer_init(&bdata->release_timer,
+-                           CLOCK_REALTIME, HRTIMER_MODE_REL_HARD);
++                           CLOCK_REALTIME, HRTIMER_MODE_REL);
+               bdata->release_timer.function = gpio_keys_irq_timer;
+ 
+               isr = gpio_keys_irq_isr;

diff --git a/queue-6.6/series b/queue-6.6/series
new file mode 100644 (file)
index 0000000..c2589e0
--- /dev/null
+++ b/queue-6.6/series
@@ -0,0 +1 @@
+input-gpio-keys-fix-a-sleep-while-atomic-with-preempt_rt.patch