netdev - [PATCH] net/bonding: Don't destroy bonding master wehn unensalving with a sysfs command

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Date:	Thu, 19 Jun 2008 18:01:37 +0300
From:	Moni Shoua <monis@...taire.COM>
To:	Jay Vosburgh <fubar@...ibm.com>
CC:	Olga Stern <olgas@...taire.com>,
	Or Gerlitz <ogerlitz@...taire.com>,
	netdev <netdev@...r.kernel.org>
Subject: [PATCH]  net/bonding: Don't destroy bonding master wehn unensalving
 with a sysfs command


It is wrong to destroy a bonding  master from a context that uses the sysfs of
 that bond. When last IPoIB slave is unenslaved from by writing to a sysfs
 file (for bond0 this would be /sys/class/net/bond0/bonding/slaves) the driver
 tries to destroy the bond. This is wrong and can lead to a lockup or a crash.
 This fix lets the bonding master stay and relies on the user to destroy the
 bonding master if necessary (i.e. before module ib_ipoib is unloaded)

This patch affects only bonds of IPoIB slaves. Ethernet slaves stay unaffected.
Signed-off-by: Moni Shoua <monis@...taire.com>
---
 drivers/net/bonding/bond_sysfs.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 08f3d39..f66f590 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -351,9 +351,6 @@ static ssize_t bonding_store_slaves(struct device *d,
 		if (dev) {
 			printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 				bond->dev->name, dev->name);
-			if (bond->setup_by_slave)
-				res = bond_release_and_destroy(bond->dev, dev);
-			else
 				res = bond_release(bond->dev, dev);
 			if (res) {
 				ret = res;
-- 
1.5.5

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