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SubjectRe: [PATCH v7] i2c: Add PCI and platform drivers for the AMD MP2 I2C controller
The errors on module exit and the hang after a read/write timeout should be
fixed in v8, someone else reported the same issue here:
https://github.com/Syniurge/i2c-amd-mp2/issues/1

Weird that despite a lot of trying by doing random stuff with my touchpad and
touchscreen neither never ever timed out on my Yoga 530.

Le mar. 30 oct. 2018 à 18:41, Tobias Thomer <thomer.tobias@gmail.com> a écrit :
>
> I've tested this patch on a Yoga 530 and it seems to work (sometimes for hours) but it randomly dies with a i2c read timeout
>
> [ 9562.237020] i2c_amd_plat_mp2 AMDI0011:00: i2c read timed out
>
> and reloading/removing of the module results in this:
>
> [ 9703.591021] pcie_mp2_amd 0000:03:00.7: length 0 in event doesn't match buffer length 64!
> [ 9703.591030] pcie_mp2_amd 0000:03:00.7: unexpected slave address 0 (expected: 2c)!
> [ 9703.863740] i2c_amd_plat_mp2 AMDI0011:01: i2c connection timed out
> [ 9707.596826] INFO: task irq/67-WCOM517E:340 blocked for more than 120 seconds.
> [ 9707.596838] Tainted: G OE 4.19.0-v7 #1
> [ 9707.596841] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 9707.596845] irq/67-WCOM517E D 0 340 2 0x80000080
> [ 9707.596851] Call Trace:
> [ 9707.596868] ? __schedule+0x29b/0x8b0
> [ 9707.596873] schedule+0x32/0x90
> [ 9707.596875] schedule_preempt_disabled+0x14/0x20
> [ 9707.596879] __mutex_lock.isra.0+0x217/0x520
> [ 9707.596884] ? __switch_to_asm+0x40/0x70
> [ 9707.596887] ? __switch_to_asm+0x34/0x70
> [ 9707.596890] ? __switch_to_asm+0x34/0x70
> [ 9707.596898] amd_mp2_read+0x4f/0x17b [i2c_amd_pci_mp2]
> [ 9707.596912] i2c_amd_xfer+0x61/0x150 [i2c_amd_plat_mp2]
> [ 9707.596919] __i2c_transfer+0x142/0x480
> [ 9707.596922] ? _raw_spin_unlock_irq+0x1d/0x30
> [ 9707.596926] ? irq_forced_thread_fn+0x70/0x70
> [ 9707.596929] i2c_transfer+0x51/0xc0
> [ 9707.596932] i2c_transfer_buffer_flags+0x4c/0x70
> [ 9707.596937] i2c_hid_irq+0x3c/0x130 [i2c_hid]
> [ 9707.596941] irq_thread_fn+0x1f/0x50
> [ 9707.596944] irq_thread+0xf7/0x1a0
> [ 9707.596946] ? irq_thread_check_affinity.part.3+0xa0/0xa0
> [ 9707.596949] ? irq_thread_dtor+0xb0/0xb0
> [ 9707.596953] kthread+0x112/0x130
> [ 9707.596956] ? kthread_park+0x80/0x80
> [ 9707.596959] ret_from_fork+0x22/0x40

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