commit: c419fcfd071cf34ba00f9f65282583772d2655e7 From: Maciej Sosnowski <[email protected]> Date: Wed, 23 May 2012 17:27:07 +0200 Subject: dca: check against empty dca_domains list before unregister provider
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: <[email protected]> Reported-by: Jiang Liu <[email protected]> Tested-by: Gaohuai Han <[email protected]> Signed-off-by: Maciej Sosnowski <[email protected]> Signed-off-by: Dan Williams <[email protected]> --- drivers/dca/dca-core.c | 5 +++++ 1 file changed, 5 insertions(+) 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); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
