Commit 14d069d
i2c: tegra: Do not mark ACPI devices as irq safe
On ACPI machines, the tegra i2c module encounters an issue due to a
mutex being called inside a spinlock. This leads to the following bug:
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:585
...
Call trace:
__might_sleep
__mutex_lock_common
mutex_lock_nested
acpi_subsys_runtime_resume
rpm_resume
tegra_i2c_xfer
The problem arises because during __pm_runtime_resume(), the spinlock
&dev->power.lock is acquired before rpm_resume() is called. Later,
rpm_resume() invokes acpi_subsys_runtime_resume(), which relies on
mutexes, triggering the error.
To address this issue, devices on ACPI are now marked as not IRQ-safe,
considering the dependency of acpi_subsys_runtime_resume() on mutexes.
Fixes: bd2fded ("i2c: tegra: Add the ACPI support")
Cc: <stable@vger.kernel.org> # v5.17+
Co-developed-by: Michael van der Westhuizen <rmikey@meta.com>
Signed-off-by: Michael van der Westhuizen <rmikey@meta.com>
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>1 parent 4e91fa1 commit 14d069d
1 file changed
+2
-2
lines changed| Original file line number | Diff line number | Diff line change | |
|---|---|---|---|
| |||
1802 | 1802 | | |
1803 | 1803 | | |
1804 | 1804 | | |
1805 | | - | |
| 1805 | + | |
1806 | 1806 | | |
1807 | | - | |
| 1807 | + | |
1808 | 1808 | | |
1809 | 1809 | | |
1810 | 1810 | | |
| |||
0 commit comments