ath9k: remove a bogus WARN_ON

On embedded hardware it's normal to not have a PCI device for the PCI
bridge that the wifi card is attached to. pdev->bus->self will be
NULL in that case. In that case, simply return without emitting an
useless kernel stack trace.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c
index 8bd8e85ece42a244a0be953b38ccd552939c445a..d704c8d9bae76af6299c825f9cff7413346514cc 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -126,7 +126,7 @@ static void ath_pci_aspm_init(struct ath_common *common)
                 * Both upstream and downstream PCIe components should
                 * have the same ASPM settings.
                 */
-               if (WARN_ON(!parent))
+               if (!parent)
                        return;
 
                pos = pci_pcie_cap(parent);
@@ -137,7 +137,7 @@ static void ath_pci_aspm_init(struct ath_common *common)
                return;
        }
 
-       if (WARN_ON(!parent))
+       if (!parent)
                return;
 
        pos = pci_pcie_cap(parent);