| Message ID | 20230313200816.30105-2-Sergey.Semin@baikalelectronics.ru (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | PCI: dwc: Relatively simple fixes and cleanups | expand |
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 53a16b8b6ac2..04fedd257ef1 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -1019,6 +1019,7 @@ void dw_pcie_setup(struct dw_pcie *pci) } /* Set the number of lanes */ + val = dw_pcie_readl_dbi(pci, PCIE_PORT_LINK_CONTROL); val &= ~PORT_LINK_FAST_LINK_MODE; val &= ~PORT_LINK_MODE_MASK; switch (pci->num_lanes) {
If CDM_CHECK capability is set then the local variable 'val' will be overwritten in the dw_pcie_setup() method in the PL_CHK register initialization procedure. Thus further variable usage in the framework of the PCIE_PORT_LINK_CONTROL register initialization must imply the variable re-initialization. Alas it hasn't been taken into account in the commit ec7b952f453c ("PCI: dwc: Always enable CDM check if "snps,enable-cdm-check" exists"). Due to that the PCIE_PORT_LINK_CONTROL register will be written with improper value in case if the CDM-check is enabled. Let's fix this by re-initializing the 'val' variable with the PCIE_PORT_LINK_CONTROL CSR content before link-mode initialization. Fixes: ec7b952f453c ("PCI: dwc: Always enable CDM check if "snps,enable-cdm-check" exists") Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> --- drivers/pci/controller/dwc/pcie-designware.c | 1 + 1 file changed, 1 insertion(+)