11 Jul
2024
11 Jul
'24
12:17 p.m.
Hi!
From: Ian Ray ian.ray@gehealthcare.com
[ Upstream commit bfc6444b57dc7186b6acc964705d7516cbaf3904 ]
Ensure that `i2c_lock' is held when setting interrupt latch and mask in pca953x_irq_bus_sync_unlock() in order to avoid races.
The other (non-probe) call site pca953x_gpio_set_multiple() ensures the lock is held before calling pca953x_write_regs().
The problem occurred when a request raced against irq_bus_sync_unlock() approximately once per thousand reboots on an i.MX8MP based system.
I don't see this queued for 5.10-stable.
Best regards, Pavel
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