From: Alexander Aring Date: Thu, 1 Sep 2016 09:24:57 +0000 (+0200) Subject: fakelb: fix schedule while atomic X-Git-Tag: firefly_0821_release~176^2^2^2~41 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=77fec8bc7a0fbee3bf5893d8c1ce755c029f2b40;p=firefly-linux-kernel-4.4.55.git fakelb: fix schedule while atomic commit bdca1fd9a6df745857e23c6056494b7fe062b4e6 upstream. This patch changes the spinlock to mutex for the available fakelb phy list. When holding the spinlock the ieee802154_unregister_hw is called which holding the rtnl_mutex, in that case we get a "BUG: sleeping function called from invalid context" error. We simple change the spinlock to mutex which allows to hold the rtnl lock there. Signed-off-by: Alexander Aring Signed-off-by: Marcel Holtmann Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/net/ieee802154/fakelb.c b/drivers/net/ieee802154/fakelb.c index 860d4aed8274..43617ded3773 100644 --- a/drivers/net/ieee802154/fakelb.c +++ b/drivers/net/ieee802154/fakelb.c @@ -30,7 +30,7 @@ static int numlbs = 2; static LIST_HEAD(fakelb_phys); -static DEFINE_SPINLOCK(fakelb_phys_lock); +static DEFINE_MUTEX(fakelb_phys_lock); static LIST_HEAD(fakelb_ifup_phys); static DEFINE_RWLOCK(fakelb_ifup_phys_lock); @@ -180,9 +180,9 @@ static int fakelb_add_one(struct device *dev) if (err) goto err_reg; - spin_lock(&fakelb_phys_lock); + mutex_lock(&fakelb_phys_lock); list_add_tail(&phy->list, &fakelb_phys); - spin_unlock(&fakelb_phys_lock); + mutex_unlock(&fakelb_phys_lock); return 0; @@ -214,10 +214,10 @@ static int fakelb_probe(struct platform_device *pdev) return 0; err_slave: - spin_lock(&fakelb_phys_lock); + mutex_lock(&fakelb_phys_lock); list_for_each_entry_safe(phy, tmp, &fakelb_phys, list) fakelb_del(phy); - spin_unlock(&fakelb_phys_lock); + mutex_unlock(&fakelb_phys_lock); return err; } @@ -225,10 +225,10 @@ static int fakelb_remove(struct platform_device *pdev) { struct fakelb_phy *phy, *tmp; - spin_lock(&fakelb_phys_lock); + mutex_lock(&fakelb_phys_lock); list_for_each_entry_safe(phy, tmp, &fakelb_phys, list) fakelb_del(phy); - spin_unlock(&fakelb_phys_lock); + mutex_unlock(&fakelb_phys_lock); return 0; }