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authorYurii Monakov <monakov.y@gmail.com>2019-12-17 14:38:36 +0300
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2020-01-10 17:23:22 +0000
commit6df19872d881641e6394f93ef2938cffcbdae5bb (patch)
treea3aee69465575f98d381a8600abe68c05acc24f2 /drivers/pci/controller/dwc
parente42617b825f8073569da76dc4510bfa019b1c35a (diff)
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: 0c4ffcfe1fbc ("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
Diffstat (limited to 'drivers/pci/controller/dwc')
-rw-r--r--drivers/pci/controller/dwc/pci-keystone.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index af677254a072..d4de4f6cff8b 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -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)