linux-kernel - Re: [PATCH] driver core: check bus->match without holding device lock(v2)

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Message-ID: <d82e647a0904101852h7f41492epad2226f29124452d@mail.gmail.com>
Date:	Sat, 11 Apr 2009 09:52:16 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Andreas Schwab <schwab@...ux-m68k.org>
Cc:	kay.sievers@...y.org, greg@...ah.com, cornelia.huck@...ibm.com,
	linux-kernel@...r.kernel.org, arjan@...ux.intel.com
Subject: Re: [PATCH] driver core: check bus->match without holding device 
	lock(v2)

2009/4/10 Andreas Schwab <schwab@...ux-m68k.org>:
> diff --git a/drivers/base/base.h b/drivers/base/base.h
> index ddc9749..087e911 100644
> --- a/drivers/base/base.h
> +++ b/drivers/base/base.h
> @@ -115,7 +115,7 @@ extern int driver_probe_device(struct device_driver *drv, struct device *dev);
>  static inline int driver_match_device(struct device_driver *drv,
>                                      struct device *dev)
>  {
> -       return drv->bus->match && drv->bus->match(dev, drv);
> +       return !drv->bus->match || drv->bus->match(dev, drv);
>  }

A similar patch has been in greg's tree:

http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/driver-core.current/driver-core-fix-driver_match_device.patch

Thanks!

-- 
Lei Ming
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