linux-kernel - Re: [PATCH v7] i2c: Add PCI and platform drivers for the AMD MP2 I2C controller

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Message-ID: <CAC_JBqqG0Jq5sB93AZ+2pi3_cac4W+Ed0chU3cmUb17HMeFFbQ@mail.gmail.com>
Date:   Sun, 4 Nov 2018 13:41:41 -0300
From:   Elie Morisse <syniurge@...il.com>
To:     Tobias Thomer <thomer.tobias@...il.com>
Cc:     helgaas@...nel.org, linux-i2c@...r.kernel.org,
        Wolfram Sang <wsa@...-dreams.de>,
        Nehal-bakulchandra.Shah@....com, Shyam-sundar.S-k@....com,
        sandeep.singh@....com, linux-kernel@...r.kernel.org,
        rjw@...ysocki.net, lenb@...nel.org, linux-acpi@...r.kernel.org
Subject: Re: [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@...il.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