]> git.ipfire.org Git - thirdparty/kernel/linux.git/commit
pinctrl: qcom: msm: Fix deadlock in pinmux configuration
authorPraveen Talari <praveen.talari@oss.qualcomm.com>
Mon, 10 Nov 2025 10:10:41 +0000 (15:40 +0530)
committerLinus Walleij <linus.walleij@linaro.org>
Wed, 12 Nov 2025 12:41:34 +0000 (13:41 +0100)
commit1c2e70397b4125022dba80f6111271a37fb36bae
treecb531feb8587d23b5c0e62fbe5d853df07279268
parent9b07cdf86a0b90556f5b68a6b20b35833b558df3
pinctrl: qcom: msm: Fix deadlock in pinmux configuration

Replace disable_irq() with disable_irq_nosync() in msm_pinmux_set_mux()
to prevent deadlock when wakeup IRQ is triggered on the same
GPIO being reconfigured.

The issue occurs when a wakeup IRQ is triggered on a GPIO and the IRQ
handler attempts to reconfigure the same GPIO's pinmux. In this scenario,
msm_pinmux_set_mux() calls disable_irq() which waits for the currently
running IRQ handler to complete, creating a circular dependency that
results in deadlock.

Using disable_irq_nosync() avoids waiting for the IRQ handler to
complete, preventing the deadlock condition while still properly
disabling the interrupt during pinmux reconfiguration.

Suggested-by: Prasad Sodagudi <prasad.sodagudi@oss.qualcomm.com>
Signed-off-by: Praveen Talari <praveen.talari@oss.qualcomm.com>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
drivers/pinctrl/qcom/pinctrl-msm.c