3.0-stable review patch. If anyone has any objections, please let me know.
------------------ From: Maciej Sosnowski <[email protected]> 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 <[email protected]> Tested-by: Gaohuai Han <[email protected]> Signed-off-by: Maciej Sosnowski <[email protected]> Signed-off-by: Dan Williams <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/dca/dca-core.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/dca/dca-core.c +++ b/drivers/dca/dca-core.c @@ -409,6 +409,11 @@ void unregister_dca_provider(struct dca_ 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
