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

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Date:	Wed, 30 Jan 2008 03:48:43 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Nate Case <ncase@...-inc.com>
CC:	Andy Fleming <afleming@...escale.com>,
	"David S. Miller" <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] PHYLIB: Locking fixes for PHY I/O potentially sleeping

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
> 
> Signed-off-by: Nate Case <ncase@...-inc.com>
> Acked-by: Andy Fleming <afleming@...escale.com>
> 
> ---
> Note: This is a resend of the patch submitted on January 3rd, 2008
> 
>  drivers/net/phy/mdio_bus.c   |    2 +-
>  drivers/net/phy/phy.c        |   68 ++++++++++++++++++++++++++++-------------
>  drivers/net/phy/phy_device.c |   11 +++----
>  include/linux/phy.h          |    5 ++-
>  4 files changed, 55 insertions(+), 31 deletions(-)

applied


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