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fakelb: fix schedule while atomic

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commit bdca1fd9a6 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 <aar@pengutronix.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Aring
2016-09-01 11:24:57 +02:00
committed by Greg Kroah-Hartman
parent bb5b96344e
commit 77fec8bc7a
1 changed files with 7 additions and 7 deletions
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14
drivers/net/ieee802154/fakelb.c
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@@ -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;
}