linux-kernel - Re: [PATCH 00/11] USB: dwc3: error handling fixes and cleanups

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Message-ID: <20230407020915.hg547t2mcc22ckwn@synopsys.com>
Date:   Fri, 7 Apr 2023 02:09:30 +0000
From:   Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To:     Johan Hovold <johan+linaro@...nel.org>
CC:     Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 00/11] USB: dwc3: error handling fixes and cleanups

On Tue, Apr 04, 2023, Johan Hovold wrote:
> When reviewing the dwc3 runtime PM implementation I noticed that the
> probe error handling and unbind code was broken. The first two patches
> addresses the corresponding imbalances.
> 
> The probe error handling has suffered from some bit rot over years and
> an attempt to clean it up lead to the realisation that the code dealing
> with the "hibernation" feature was both broken and had never been used.
> Rather than try to fix up something which has never been used since it
> was first merged ten years ago, let's get rid of this dead code until
> there is a mainline user (and a complete implementation).
> 
> The rest of the series clean up probe and core initialisation by using
> descriptive error labels and adding a few helper functions to improve
> readability which will hopefully help prevent similar bugs from being
> introduced in the future.
> 
> Johan
> 
> 
> Johan Hovold (11):
>   USB: dwc3: fix runtime pm imbalance on probe errors
>   USB: dwc3: fix runtime pm imbalance on unbind
>   USB: dwc3: disable autosuspend on unbind
>   USB: dwc3: gadget: drop dead hibernation code
>   USB: dwc3: drop dead hibernation code
>   USB: dwc3: clean up probe error labels
>   USB: dwc3: clean up phy init error handling
>   USB: dwc3: clean up core init error handling
>   USB: dwc3: refactor phy handling
>   USB: dwc3: refactor clock lookups
>   USB: dwc3: clean up probe declarations
> 
>  drivers/usb/dwc3/core.c   | 426 ++++++++++++++++----------------------
>  drivers/usb/dwc3/core.h   |   8 -
>  drivers/usb/dwc3/gadget.c |  46 +---
>  3 files changed, 182 insertions(+), 298 deletions(-)
> 
> -- 
> 2.39.2
> 

Thanks for the cleanup work. I've reviewed some patches, but still need
to spend some more time reviewing the runtime changes.

Thanks,
Thinh