From: Hector Martin <marcan@marcan.st>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Sven Peter <sven@svenpeter.dev>,
Alyssa Rosenzweig <alyssa@rosenzweig.io>,
Marc Zyngier <maz@kernel.org>,
linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org,
linux-kernel@vger.kernel.org, asahi@lists.linux.dev,
Hector Martin <marcan@marcan.st>
Subject: [PATCH] pinctrl: apple: Use a raw spinlock for the regmap
Date: Tue, 24 May 2022 23:22:06 +0900 [thread overview]
Message-ID: <20220524142206.18833-1-marcan@marcan.st> (raw)
The irqchip ops are called with a raw spinlock held, so the subsequent
regmap usage cannot use a plain spinlock.
spi-hid-apple-of spi0.0: spihid_apple_of_probe:74
=============================
[ BUG: Invalid wait context ]
5.18.0-asahi-00176-g0fa3ab03bdea #1337 Not tainted
-----------------------------
kworker/u20:3/86 is trying to lock:
ffff8000166b5018 (pinctrl_apple_gpio:462:(®map_config)->lock){....}-{3:3}, at: regmap_lock_spinlock+0x18/0x30
other info that might help us debug this:
context-{5:5}
7 locks held by kworker/u20:3/86:
#0: ffff800017725d48 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1c8/0x670
#1: ffff80001e33bdd0 (deferred_probe_work){+.+.}-{0:0}, at: process_one_work+0x1c8/0x670
#2: ffff800017d629a0 (&dev->mutex){....}-{4:4}, at: __device_attach+0x30/0x17c
#3: ffff80002414e618 (&ctlr->add_lock){+.+.}-{4:4}, at: spi_add_device+0x40/0x80
#4: ffff800024116990 (&dev->mutex){....}-{4:4}, at: __device_attach+0x30/0x17c
#5: ffff800022d4be58 (request_class){+.+.}-{4:4}, at: __setup_irq+0xa8/0x720
#6: ffff800022d4bcc8 (lock_class){....}-{2:2}, at: __setup_irq+0xcc/0x720
Fixes: a0f160ffcb83 ("pinctrl: add pinctrl/GPIO driver for Apple SoCs")
Signed-off-by: Hector Martin <marcan@marcan.st>
---
drivers/pinctrl/pinctrl-apple-gpio.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/pinctrl/pinctrl-apple-gpio.c b/drivers/pinctrl/pinctrl-apple-gpio.c
index 3a33731b8cdb..b02dad2b2f69 100644
--- a/drivers/pinctrl/pinctrl-apple-gpio.c
+++ b/drivers/pinctrl/pinctrl-apple-gpio.c
@@ -72,6 +72,7 @@ struct regmap_config regmap_config = {
.max_register = 512 * sizeof(u32),
.num_reg_defaults_raw = 512,
.use_relaxed_mmio = true,
+ .use_raw_spinlock = true,
};
/* No locking needed to mask/unmask IRQs as the interrupt mode is per pin-register. */
--
2.35.1
next reply other threads:[~2022-05-24 14:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-24 14:22 Hector Martin [this message]
2022-05-25 7:38 ` [PATCH] pinctrl: apple: Use a raw spinlock for the regmap Linus Walleij
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