diff options
Diffstat (limited to 'target/linux/mvebu/patches-5.4/526-PCI-aardvark-disable-LOS-state-by-default.patch')
| -rw-r--r-- | target/linux/mvebu/patches-5.4/526-PCI-aardvark-disable-LOS-state-by-default.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-5.4/526-PCI-aardvark-disable-LOS-state-by-default.patch b/target/linux/mvebu/patches-5.4/526-PCI-aardvark-disable-LOS-state-by-default.patch new file mode 100644 index 0000000000..b6fcec81f8 --- /dev/null +++ b/target/linux/mvebu/patches-5.4/526-PCI-aardvark-disable-LOS-state-by-default.patch @@ -0,0 +1,55 @@ +From patchwork Thu Sep 28 12:58:36 2017 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +Subject: [v2,5/7] PCI: aardvark: disable LOS state by default +X-Patchwork-Submitter: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +X-Patchwork-Id: 819590 +Message-Id: <20170928125838.11887-6-thomas.petazzoni@free-electrons.com> +To: Bjorn Helgaas <bhelgaas@google.com>, linux-pci@vger.kernel.org +Cc: Jason Cooper <jason@lakedaemon.net>, Andrew Lunn <andrew@lunn.ch>, + Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>, Gregory Clement + <gregory.clement@free-electrons.com>, + Nadav Haklai <nadavh@marvell.com>, Hanna Hawa <hannah@marvell.com>, + Yehuda Yitschak <yehuday@marvell.com>, + linux-arm-kernel@lists.infradead.org, Antoine Tenart + <antoine.tenart@free-electrons.com>, =?utf-8?q?Miqu=C3=A8l_Raynal?= + <miquel.raynal@free-electrons.com>, Victor Gu <xigu@marvell.com>, + Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +Date: Thu, 28 Sep 2017 14:58:36 +0200 +From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +List-Id: <linux-pci.vger.kernel.org> + +From: Victor Gu <xigu@marvell.com> + +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@marvell.com> +Reviewed-by: Evan Wang <xswang@marvell.com> +Reviewed-by: Nadav Haklai <nadavh@marvell.com> +[Thomas: tweak commit log.] +Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +--- + drivers/pci/controller/pci-aardvark.c | 3 +-- + 1 file changed, 1 insertion(+), 2 deletions(-) + +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -324,8 +324,7 @@ static void advk_pcie_setup_hw(struct ad + + 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); |