APPLIED[F]: [SRU][Focal/Eoan/OEM-B-OSP1][PATCH 0/5] Fix hang issue if sof fails to load firmware

[Hui Wang]

On 2020/2/26 上午10:42, Seth Forshee wrote:
> On Tue, Feb 25, 2020 at 08:36:10PM -0600, Seth Forshee wrote:
>> On Fri, Feb 21, 2020 at 05:00:39PM +0800, Hui Wang wrote:
>>> BugLink: http://bugs.launchpad.net/bugs/1861837
>>>
>>> If the sof driver fails to load the firmware, it doesn't release the
>>> resource, then it make the system hang when suspending and resuming.
>>>
>>> After this patchset is applied, please also apply the patchset we
>>> just reverted 2 weeks ago, since this patchset is the fixing patches
>>> for the patches we reverted (#1857409). If need me to resend the
>>> reverted patches, I will resend them.
>>>
>>>
>>> [Impact]
>>> The machine hangs during suspend/resume if the sof driver fails to
>>> load firmware.
>>>
>>> [Fix]
>>> This bug is fixed in the mainline kernel v5.6-rc1, now backported
>>> those patches to ubuntu kernel
>>>
>>> [Test Case]
>>> sudo mv /lib/firmware/intel/sof /lib/firmware/intel/sof-bak, reboot
>>> then suspend and resume, the system will not hang anymore
>>>
>>> And if the sof driver load the firmware successfully, the audio
>>> functions all worked well as before.
>>>
>>> [Regression Risk]
>>> Low, the patches are backported from upstream kernel, and I tested
>>> these patches on Lenovo and Dell dmic machines.
>> Applied to focal/master-next, thanks!
> Forgot to mention, I actually only applied patch 4 as 1-3 had already
> come in from upstream stable. Patch 1 at least was not completely
> identical to the upstream stable patch, so you may want to check to make
> sure it does what you need (I didn't really look into how they were
> different, possibly it is just comment/whitespace differences).

Checked, no functional difference.

Thx.

Hui.