Commit 6df19872 authored Dec 17, 2019 by Yurii Monakov Committed by Lorenzo Pieralisi Jan 10, 2020

PCI: keystone: Fix link training retries initiation



ks_pcie_stop_link() function does not clear LTSSM_EN_VAL bit so
link training was not triggered more than once after startup.
In configurations where link can be unstable during early boot,
for example, under low temperature, it will never be established.

Fixes: 0c4ffcfe ("PCI: keystone: Add TI Keystone PCIe driver")
Signed-off-by: Yurii Monakov <monakov.y@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Andrew Murray <andrew.murray@arm.com>
Cc: stable@vger.kernel.org

parent e42617b8

drivers/pci/controller/dwc/pci-keystone.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -510,7 +510,7 @@ static void ks_pcie_stop_link(struct dw_pcie *pci)
		/* Disable Link training */
		val = ks_pcie_app_readl(ks_pcie, CMD_STATUS);
		val &= ~LTSSM_EN_VAL;
		ks_pcie_app_writel(ks_pcie, CMD_STATUS, LTSSM_EN_VAL \| val);
		ks_pcie_app_writel(ks_pcie, CMD_STATUS, val);
		}

		static int ks_pcie_start_link(struct dw_pcie *pci)

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