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| author | Yurii Monakov <monakov.y@gmail.com> | 2019-12-17 14:38:36 +0300 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2020-01-10 17:23:22 +0000 |
| commit | 6df19872d881641e6394f93ef2938cffcbdae5bb (patch) | |
| tree | a3aee69465575f98d381a8600abe68c05acc24f2 /drivers/pci | |
| parent | e42617b825f8073569da76dc4510bfa019b1c35a (diff) | |
| download | linux-6df19872d881641e6394f93ef2938cffcbdae5bb.tar.gz linux-6df19872d881641e6394f93ef2938cffcbdae5bb.tar.bz2 linux-6df19872d881641e6394f93ef2938cffcbdae5bb.zip | |
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')
| -rw-r--r-- | drivers/pci/controller/dwc/pci-keystone.c | 2 |
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) |