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authorNate Case <ncase@xes-inc.com>2008-01-29 19:05:09 +0300
committerDavid S. Miller <davem@davemloft.net>2008-02-03 15:28:41 +0300
commit35b5f6b1a82b5c586e0b24c711dc6ba944e88ef1 (patch)
treecf08793802ce8f91f13e262c3b6cdcf0a01d95e9 /include/linux/phy.h
parent2b91213064bd882c3adf35f028c6d12fab3269ec (diff)
downloadlinux-35b5f6b1a82b5c586e0b24c711dc6ba944e88ef1.tar.xz
PHYLIB: Locking fixes for PHY I/O potentially sleeping
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@xes-inc.com> Acked-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/phy.h')
-rw-r--r--include/linux/phy.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 554836edd915..5e43ae751412 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -88,7 +88,7 @@ struct mii_bus {
/* A lock to ensure that only one thing can read/write
* the MDIO bus at a time */
- spinlock_t mdio_lock;
+ struct mutex mdio_lock;
struct device *dev;
@@ -284,10 +284,11 @@ struct phy_device {
/* Interrupt and Polling infrastructure */
struct work_struct phy_queue;
+ struct work_struct state_queue;
struct timer_list phy_timer;
atomic_t irq_disable;
- spinlock_t lock;
+ struct mutex lock;
struct net_device *attached_dev;