Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Thu, 18 Aug 2022 17:38:15 -0700
From:   Isaac Manjarres <isaacmanjarres@google.com>
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Ulf Hansson <ulf.hansson@linaro.org>,
        Tomeu Vizoso <tomeu.vizoso@collabora.com>,
        Russell King <rmk+kernel@arm.linux.org.uk>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Saravana Kannan <saravanak@google.com>, stable@kernel.org,
        kernel-team@android.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] driver core: Fix bus_type.match() error handling
Message-ID: <Yv7bd6Yl8+thp2CY@google.com>
References: <20220815211919.2028890-1-isaacmanjarres@google.com>
 <20220816042507.GB1108868@roeck-us.net>
 <YvsoYzIhOtX9DOi2@google.com>
 <20220816111311.GC1108868@roeck-us.net>
 <YvvQOBk9T3J1uX8k@google.com>
 <20220817010559.GA1880847@roeck-us.net>
 <YvxAfiSOrzy7/c1J@google.com>
 <20220818225932.GA3433999@roeck-us.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20220818225932.GA3433999@roeck-us.net>
Precedence: bulk

On Thu, Aug 18, 2022 at 03:59:32PM -0700, Guenter Roeck wrote:
> Requesting system reboot
> sd 0:0:0:0: [sda] Synchronizing SCSI cache
> ci_hdrc ci_hdrc.1: remove, state 4
> usb usb2: USB disconnect, device number 1
> ci_hdrc ci_hdrc.1: USB bus 2 deregistered
> ci_hdrc ci_hdrc.0: remove, state 1
> usb usb1: USB disconnect, device number 1
> usb 1-1: USB disconnect, device number 2
> sd 0:0:0:0: [sda] Synchronizing SCSI cache
> sd 0:0:0:0: [sda] Synchronize Cache(10) failed: Result: hostbyte=0x01 driverbyte=DRIVER_OK
> 
> [ stuck here until qemu is killed ]
> 
Hi Guenter,

I'm actually observing the behavior described above even without my patch.
The tip of my tree is currently at 573ae4f13f63 ("tee: add overflow check in
register_shm_helper()"). I used git bisect to find what commit was
causing the problem, and narrowed it down to this series[1].

I reverted all 4 patches in that series, and I no longer see this hang
with my tree.

[1]: https://lore.kernel.org/all/20220712221936.1199196-1-bvanassche@acm.org/

Are these patches part of the tree you're using for testing and
observing this hang in?

Thanks,
Isaac