Hi Niklas,
On Thursday 08 March 2018 07:03 PM, Niklas Cassel wrote:
> Since a 64-bit BAR consists of a BAR pair, we need to write to both
> BARs in the BAR pair to clear the BAR properly.
>
> Signed-off-by: Niklas Cassel <niklas.cassel@xxxxxxxx>
> ---
> drivers/pci/dwc/pcie-designware-ep.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/pci/dwc/pcie-designware-ep.c b/drivers/pci/dwc/pcie-designware-ep.c
> index 946bbdf53c4d..b20b2651caf9 100644
> --- a/drivers/pci/dwc/pcie-designware-ep.c
> +++ b/drivers/pci/dwc/pcie-designware-ep.c
> @@ -22,11 +22,18 @@ void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
> void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
> {
> u32 reg;
> + u32 val;
>
> reg = PCI_BASE_ADDRESS_0 + (4 * bar);
> + val = dw_pcie_readl_dbi(pci, reg);
> dw_pcie_dbi_ro_wr_en(pci);
> dw_pcie_writel_dbi2(pci, reg, 0x0);
> dw_pcie_writel_dbi(pci, reg, 0x0);
> + if (!(val & PCI_BASE_ADDRESS_SPACE_IO) &&
> + (val & PCI_BASE_ADDRESS_MEM_TYPE_64)) {
> + dw_pcie_writel_dbi2(pci, reg + 4, 0x0);
> + dw_pcie_writel_dbi(pci, reg + 4, 0x0);
> + }
same comment as previous patch apply here too.
Thanks
Kishon
