leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

dca: check against empty dca_domains list before unregister provider

Browse Source 
When providers get blocked unregister_dca_providers() is called ending up
with dca_providers and dca_domain lists emptied. Dca should be prevented from
trying to unregister any provider if dca_domain list is found empty.

Cc: <stable@vger.kernel.org>
Reported-by: Jiang Liu <jiang.liu@huawei.com>
Tested-by: Gaohuai Han <hangaohuai@huawei.com>
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <djbw@fb.com>
This commit is contained in:
Maciej Sosnowski 2012-05-23 17:27:07 +02:00 committed by Vinod Koul
parent 6decffd5f6
commit c419fcfd07
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/dca/dca-core.c
View File

@ -420,6 +420,11 @@ void unregister_dca_provider(struct dca_provider *dca, struct device *dev)
raw_spin_lock_irqsave(&dca_lock, flags);
if (list_empty(&dca_domains)) {
raw_spin_unlock_irqrestore(&dca_lock, flags);
return;
}
list_del(&dca->node);
pci_rc = dca_pci_rc_from_dev(dev);