From: Victor Gu <xigu@xxxxxxxxxxx> Some PCIe devices do not support LOS, and will cause timeouts if the root complex forces the LOS state. This patch disables the LOS state by default. This is part of fixing bug https://bugzilla.kernel.org/show_bug.cgi?id=196339, this commit was reported as the user to be important to get a Intel 7260 mini-PCIe WiFi card working. Fixes: 8c39d710363c1 ("PCI: aardvark: Add Aardvark PCI host controller driver") Signed-off-by: Victor Gu <xigu@xxxxxxxxxxx> Reviewed-by: Evan Wang <xswang@xxxxxxxxxxx> Reviewed-by: Nadav Haklai <nadavh@xxxxxxxxxxx> [Thomas: tweak commit log.] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx> --- drivers/pci/host/pci-aardvark.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c index 23e243135ebe..a173f31853df 100644 --- a/drivers/pci/host/pci-aardvark.c +++ b/drivers/pci/host/pci-aardvark.c @@ -368,8 +368,7 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie) advk_pcie_wait_for_link(pcie); - reg = PCIE_CORE_LINK_L0S_ENTRY | - (1 << PCIE_CORE_LINK_WIDTH_SHIFT); + reg = (1 << PCIE_CORE_LINK_WIDTH_SHIFT); advk_writel(pcie, reg, PCIE_CORE_LINK_CTRL_STAT_REG); reg = advk_readl(pcie, PCIE_CORE_CMD_STATUS_REG); -- 2.13.5
