| Message ID | 1362052635-18790-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/dca/dca-core.c b/drivers/dca/dca-core.c index bc6f5fa..819dfda 100644 --- a/drivers/dca/dca-core.c +++ b/drivers/dca/dca-core.c @@ -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);
This is a note to let you know that I have just added a patch titled dca: check against empty dca_domains list before unregister to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From b23b69d9f8689a28b5585da224f72da7161d8932 Mon Sep 17 00:00:00 2001 From: Maciej Sosnowski <maciej.sosnowski@intel.com> Date: Wed, 23 May 2012 17:27:07 +0200 Subject: [PATCH] dca: check against empty dca_domains list before unregister provider commit c419fcfd071cf34ba00f9f65282583772d2655e7 upstream. 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. 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> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/dca/dca-core.c | 5 +++++ 1 file changed, 5 insertions(+) -- 1.8.1.2