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-rw-r--r--target/linux/mvebu/patches-5.4/526-PCI-aardvark-disable-LOS-state-by-default.patch55
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);