From: Xiaowei Bao xiaowei.bao@nxp.com
The VF_BARn_REG register's Prefetchable and Type bit fields are overwritten by a write to VF's BAR Mask register. workaround: Before writing to the VF_BARn_MASK_REG register, write 0b to the PCIE_MISC_CONTROL_1_OFF register.
Signed-off-by: Xiaowei Bao xiaowei.bao@nxp.com Signed-off-by: Hou Zhiqiang Zhiqiang.Hou@nxp.com --- V2: - Rebase the patch without change intent.
drivers/pci/pcie_layerscape_ep.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/pci/pcie_layerscape_ep.c b/drivers/pci/pcie_layerscape_ep.c index e609607c3a..3f22c5ef7a 100644 --- a/drivers/pci/pcie_layerscape_ep.c +++ b/drivers/pci/pcie_layerscape_ep.c @@ -164,6 +164,15 @@ static void ls_pcie_setup_ep(struct ls_pcie_ep *pcie_ep) if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) { pcie_ep->sriov_flag = 1; for (pf = 0; pf < PCIE_PF_NUM; pf++) { + /* + * The VF_BARn_REG register's Prefetchable and Type bit + * fields are overwritten by a write to VF's BAR Mask + * register. Before writing to the VF_BARn_MASK_REG + * register, write 0b to the PCIE_MISC_CONTROL_1_OFF + * register. + */ + writel(0, pcie->dbi + PCIE_MISC_CONTROL_1_OFF); + if (pcie_ep->cfg2_flag) { for (vf = 0; vf <= PCIE_VF_NUM; vf++) { ctrl_writel(pcie,