netdev - Re: [PATCH] PHYLIB: Locking fixes for PHY I/O potentially sleeping

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Message-id: <1201027764.5383.11.camel@dhollis-lnx.sunera.com>
Date:	Tue, 22 Jan 2008 18:49:24 +0000
From:	David Hollis <dhollis@...ehollis.com>
To:	Nate Case <ncase@...-inc.com>
Cc:	Andy Fleming <afleming@...escale.com>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] PHYLIB: Locking fixes for PHY I/O potentially sleeping


On Thu, 2008-01-03 at 17:36 -0600, Nate Case wrote:
> 
> PHY read/write functions can potentially sleep (e.g., a PHY accessed
> via I2C).  The following changes were made to account for this:
> 
>     * Change spin locks to mutex locks
>     * Add a BUG_ON() to phy_read() phy_write() to warn against
>       calling them from an interrupt context.
>     * Use work queue for PHY state machine handling since
>       it can potentially sleep
>     * Change phydev lock from spinlock to mutex


Cool, now I think I might be able to use the PAL for USB Ethernet
devices.


-- 
David Hollis <dhollis@...ehollis.com>

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