From: Niklas Söderlund niklas.soderlund+renesas@ragnatech.se
commit f02c41f87cfe61440c18bf77d1ef0a884b9ee2b5 upstream.
Use raw_spinlock in order to fix spurious messages about invalid context when spinlock debugging is enabled. The lock is only used to serialize register access.
[ 4.239592] ============================= [ 4.239595] [ BUG: Invalid wait context ] [ 4.239599] 6.13.0-rc7-arm64-renesas-05496-gd088502a519f #35 Not tainted [ 4.239603] ----------------------------- [ 4.239606] kworker/u8:5/76 is trying to lock: [ 4.239609] ffff0000091898a0 (&p->lock){....}-{3:3}, at: gpio_rcar_config_interrupt_input_mode+0x34/0x164 [ 4.239641] other info that might help us debug this: [ 4.239643] context-{5:5} [ 4.239646] 5 locks held by kworker/u8:5/76: [ 4.239651] #0: ffff0000080fb148 ((wq_completion)async){+.+.}-{0:0}, at: process_one_work+0x190/0x62c [ 4.250180] OF: /soc/sound@ec500000/ports/port@0/endpoint: Read of boolean property 'frame-master' with a value. [ 4.254094] #1: ffff80008299bd80 ((work_completion)(&entry->work)){+.+.}-{0:0}, at: process_one_work+0x1b8/0x62c [ 4.254109] #2: ffff00000920c8f8 [ 4.258345] OF: /soc/sound@ec500000/ports/port@1/endpoint: Read of boolean property 'bitclock-master' with a value. [ 4.264803] (&dev->mutex){....}-{4:4}, at: __device_attach_async_helper+0x3c/0xdc [ 4.264820] #3: ffff00000a50ca40 (request_class#2){+.+.}-{4:4}, at: __setup_irq+0xa0/0x690 [ 4.264840] #4: [ 4.268872] OF: /soc/sound@ec500000/ports/port@1/endpoint: Read of boolean property 'frame-master' with a value. [ 4.273275] ffff00000a50c8c8 (lock_class){....}-{2:2}, at: __setup_irq+0xc4/0x690 [ 4.296130] renesas_sdhi_internal_dmac ee100000.mmc: mmc1 base at 0x00000000ee100000, max clock rate 200 MHz [ 4.304082] stack backtrace: [ 4.304086] CPU: 1 UID: 0 PID: 76 Comm: kworker/u8:5 Not tainted 6.13.0-rc7-arm64-renesas-05496-gd088502a519f #35 [ 4.304092] Hardware name: Renesas Salvator-X 2nd version board based on r8a77965 (DT) [ 4.304097] Workqueue: async async_run_entry_fn [ 4.304106] Call trace: [ 4.304110] show_stack+0x14/0x20 (C) [ 4.304122] dump_stack_lvl+0x6c/0x90 [ 4.304131] dump_stack+0x14/0x1c [ 4.304138] __lock_acquire+0xdfc/0x1584 [ 4.426274] lock_acquire+0x1c4/0x33c [ 4.429942] _raw_spin_lock_irqsave+0x5c/0x80 [ 4.434307] gpio_rcar_config_interrupt_input_mode+0x34/0x164 [ 4.440061] gpio_rcar_irq_set_type+0xd4/0xd8 [ 4.444422] __irq_set_trigger+0x5c/0x178 [ 4.448435] __setup_irq+0x2e4/0x690 [ 4.452012] request_threaded_irq+0xc4/0x190 [ 4.456285] devm_request_threaded_irq+0x7c/0xf4 [ 4.459398] ata1: link resume succeeded after 1 retries [ 4.460902] mmc_gpiod_request_cd_irq+0x68/0xe0 [ 4.470660] mmc_start_host+0x50/0xac [ 4.474327] mmc_add_host+0x80/0xe4 [ 4.477817] tmio_mmc_host_probe+0x2b0/0x440 [ 4.482094] renesas_sdhi_probe+0x488/0x6f4 [ 4.486281] renesas_sdhi_internal_dmac_probe+0x60/0x78 [ 4.491509] platform_probe+0x64/0xd8 [ 4.495178] really_probe+0xb8/0x2a8 [ 4.498756] __driver_probe_device+0x74/0x118 [ 4.503116] driver_probe_device+0x3c/0x154 [ 4.507303] __device_attach_driver+0xd4/0x160 [ 4.511750] bus_for_each_drv+0x84/0xe0 [ 4.515588] __device_attach_async_helper+0xb0/0xdc [ 4.520470] async_run_entry_fn+0x30/0xd8 [ 4.524481] process_one_work+0x210/0x62c [ 4.528494] worker_thread+0x1ac/0x340 [ 4.532245] kthread+0x10c/0x110 [ 4.535476] ret_from_fork+0x10/0x20
Signed-off-by: Niklas Söderlund niklas.soderlund+renesas@ragnatech.se Reviewed-by: Geert Uytterhoeven geert+renesas@glider.be Tested-by: Geert Uytterhoeven geert+renesas@glider.be Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20250121135833.3769310-1-niklas.soderlund+renesas@... Signed-off-by: Bartosz Golaszewski bartosz.golaszewski@linaro.org [PL: manullay applied the changes] Signed-off-by: Lad Prabhakar prabhakar.mahadev-lad.rj@bp.renesas.com Reviewed-by: Pavel Machek pavel@denx.de # for 5.10-stable --- Hi all,
Sending this patch to stable linux-5.10.y as requested by Pavel [0], so that this can be included into CIP kernel. Ive added a reviewed-by tag for Pavel which was provided here [0].
Similar patch is already present in linux-6.1.y and later: - https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/driv... - https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/driv...
[0] https://lore.kernel.org/all/aKb38+2Q49y8kzBl@duo.ucw.cz/
Cheers, Prabhakar --- drivers/gpio/gpio-rcar.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c index 80bf2a84f296..d5db55d78304 100644 --- a/drivers/gpio/gpio-rcar.c +++ b/drivers/gpio/gpio-rcar.c @@ -34,7 +34,7 @@ struct gpio_rcar_bank_info {
struct gpio_rcar_priv { void __iomem *base; - spinlock_t lock; + raw_spinlock_t lock; struct device *dev; struct gpio_chip gpio_chip; struct irq_chip irq_chip; @@ -114,7 +114,7 @@ static void gpio_rcar_config_interrupt_input_mode(struct gpio_rcar_priv *p, * "Setting Level-Sensitive Interrupt Input Mode" */
- spin_lock_irqsave(&p->lock, flags); + raw_spin_lock_irqsave(&p->lock, flags);
/* Configure positive or negative logic in POSNEG */ gpio_rcar_modify_bit(p, POSNEG, hwirq, !active_high_rising_edge); @@ -133,7 +133,7 @@ static void gpio_rcar_config_interrupt_input_mode(struct gpio_rcar_priv *p, if (!level_trigger) gpio_rcar_write(p, INTCLR, BIT(hwirq));
- spin_unlock_irqrestore(&p->lock, flags); + raw_spin_unlock_irqrestore(&p->lock, flags); }
static int gpio_rcar_irq_set_type(struct irq_data *d, unsigned int type) @@ -226,7 +226,7 @@ static void gpio_rcar_config_general_input_output_mode(struct gpio_chip *chip, * "Setting General Input Mode" */
- spin_lock_irqsave(&p->lock, flags); + raw_spin_lock_irqsave(&p->lock, flags);
/* Configure positive logic in POSNEG */ gpio_rcar_modify_bit(p, POSNEG, gpio, false); @@ -241,7 +241,7 @@ static void gpio_rcar_config_general_input_output_mode(struct gpio_chip *chip, if (p->has_outdtsel && output) gpio_rcar_modify_bit(p, OUTDTSEL, gpio, false);
- spin_unlock_irqrestore(&p->lock, flags); + raw_spin_unlock_irqrestore(&p->lock, flags); }
static int gpio_rcar_request(struct gpio_chip *chip, unsigned offset) @@ -310,9 +310,9 @@ static void gpio_rcar_set(struct gpio_chip *chip, unsigned offset, int value) struct gpio_rcar_priv *p = gpiochip_get_data(chip); unsigned long flags;
- spin_lock_irqsave(&p->lock, flags); + raw_spin_lock_irqsave(&p->lock, flags); gpio_rcar_modify_bit(p, OUTDT, offset, value); - spin_unlock_irqrestore(&p->lock, flags); + raw_spin_unlock_irqrestore(&p->lock, flags); }
static void gpio_rcar_set_multiple(struct gpio_chip *chip, unsigned long *mask, @@ -329,12 +329,12 @@ static void gpio_rcar_set_multiple(struct gpio_chip *chip, unsigned long *mask, if (!bankmask) return;
- spin_lock_irqsave(&p->lock, flags); + raw_spin_lock_irqsave(&p->lock, flags); val = gpio_rcar_read(p, OUTDT); val &= ~bankmask; val |= (bankmask & bits[0]); gpio_rcar_write(p, OUTDT, val); - spin_unlock_irqrestore(&p->lock, flags); + raw_spin_unlock_irqrestore(&p->lock, flags); }
static int gpio_rcar_direction_output(struct gpio_chip *chip, unsigned offset, @@ -454,7 +454,7 @@ static int gpio_rcar_probe(struct platform_device *pdev) return -ENOMEM;
p->dev = dev; - spin_lock_init(&p->lock); + raw_spin_lock_init(&p->lock);
/* Get device configuration from DT node */ ret = gpio_rcar_parse_dt(p, &npins);