linux-kernel - [PATCH 1/2] gpio: 104-dio-48e: Enable use_raw_spinlock for dio48e_regmap

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <05a878d340251b781387db4b6490f288e41a651c.1680543810.git.william.gray@linaro.org>
Date:   Mon,  3 Apr 2023 13:53:13 -0400
From:   William Breathitt Gray <william.gray@...aro.org>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        William Breathitt Gray <william.gray@...aro.org>
Subject: [PATCH 1/2] gpio: 104-dio-48e: Enable use_raw_spinlock for dio48e_regmap_config

The dio48e regmap can be used in an interrupt context by regmap-irq. To
prevent a deadlock, enable use_raw_spinlock for dio48e_regmap_config.

Fixes: 2f7e845f512f ("gpio: 104-dio-48e: Migrate to the regmap-irq API")
Signed-off-by: William Breathitt Gray <william.gray@...aro.org>
---
 drivers/gpio/gpio-104-dio-48e.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpio-104-dio-48e.c b/drivers/gpio/gpio-104-dio-48e.c
index a3846faf3780..11c48130bb8f 100644
--- a/drivers/gpio/gpio-104-dio-48e.c
+++ b/drivers/gpio/gpio-104-dio-48e.c
@@ -86,6 +86,7 @@ static const struct regmap_config dio48e_regmap_config = {
 	.volatile_table = &dio48e_volatile_table,
 	.precious_table = &dio48e_precious_table,
 	.cache_type = REGCACHE_FLAT,
+	.use_raw_spinlock = true,
 };
 
 /* only bit 3 on each respective Port C supports interrupts */
-- 
2.39.2