Re: [PATCH v2 0/4] gpio: fix SRCU bugs
From: Mark Brown
Date: Wed Feb 14 2024 - 08:17:25 EST
On Wed, Feb 14, 2024 at 09:44:15AM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
>
> Here are four fixes to some bugs in recent SRCU changes. The first one fixes
> an actual race condition. The other three just make lockdep happy.
This doesn't fix the issue I reported yesterday when applied on top of
today's next:
https://lava.sirena.org.uk/scheduler/job/585469
[ 1.995518] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000078
...
[ 2.176162] Call trace:
[ 2.178610] check_init_srcu_struct+0x1c/0xa0
[ 2.182974] synchronize_srcu+0x1c/0x100
[ 2.186904] gpiod_request_commit+0xec/0x1e0
[ 2.191183] gpiochip_request_own_desc+0x58/0x124
[ 2.195894] gpiod_hog+0x114/0x1b4
[ 2.199305] of_gpiochip_add+0x208/0x370
[ 2.203232] gpiochip_add_data_with_key+0x71c/0xf10
[ 2.208117] devm_gpiochip_add_data_with_key+0x30/0x7c
[ 2.213261] mxc_gpio_probe+0x208/0x4b0
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