From 8adc9240f98a816f7e9b3d93b9446a790110e062 Mon Sep 17 00:00:00 2001 From: Michael Chan Date: Thu, 23 Dec 2010 07:42:57 +0000 Subject: [PATCH] cnic: Prevent "scheduling while atomic" when calling ->cnic_init() cnic_dev_list is protected by rtnl_lock and cnic_dev_lock spin_lock during modifications. When looping on cnic_dev_list and calling ->cnic_init(), we should just hold rtnl_lock since ->cnic_init() may sleep. Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/cnic.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/cnic.c b/drivers/net/cnic.c index 9c2e7860b18e..3a7d3ce6db7b 100644 --- a/drivers/net/cnic.c +++ b/drivers/net/cnic.c @@ -59,6 +59,7 @@ MODULE_DESCRIPTION("Broadcom NetXtreme II CNIC Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(CNIC_MODULE_VERSION); +/* cnic_dev_list modifications are protected by both rtnl and cnic_dev_lock */ static LIST_HEAD(cnic_dev_list); static LIST_HEAD(cnic_udev_list); static DEFINE_RWLOCK(cnic_dev_lock); @@ -445,14 +446,12 @@ int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops) /* Prevent race conditions with netdev_event */ rtnl_lock(); - read_lock(&cnic_dev_lock); list_for_each_entry(dev, &cnic_dev_list, list) { struct cnic_local *cp = dev->cnic_priv; if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type])) ulp_ops->cnic_init(dev); } - read_unlock(&cnic_dev_lock); rtnl_unlock(); return 0; -- 2.20.1