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| author |  Richard Zhu <hongxing.zhu@nxp.com>
| 2022-07-14 15:31:04 +0800 |
|---|---|---|
| committer |  Bjorn Helgaas <bhelgaas@google.com>
| 2022-08-01 15:33:50 -0500 |
| commit | 508919d0a95c04ef04469e60776146a9795c07cf (patch) | |
| tree | aea85df48404922fab3642c9a324b6db0c748da8 /drivers/pci/controller | |
| parent | PCI: imx6: Move regulator enable out of imx6_pcie_deassert_core_reset() (diff) | |
| download | linux-508919d0a95c04ef04469e60776146a9795c07cf.tar.gz linux-508919d0a95c04ef04469e60776146a9795c07cf.tar.bz2 linux-508919d0a95c04ef04469e60776146a9795c07cf.zip | |
PCI: imx6: Mark the link down as non-fatal error
If the PCIe link is down, return zero from imx6_pcie_start_link() so the
driver will probe successfully.
Link: https://lore.kernel.org/r/1657783869-19194-13-git-send-email-hongxing.zhu@nxp.com
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'drivers/pci/controller')
| -rw-r--r-- | drivers/pci/controller/dwc/pci-imx6.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index cfb67f422e46..a693286c9843 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -836,7 +836,9 @@ static int imx6_pcie_start_link(struct dw_pcie *pci) /* Start LTSSM. */ imx6_pcie_ltssm_enable(dev); - dw_pcie_wait_for_link(pci); + ret = dw_pcie_wait_for_link(pci); + if (ret) + goto err_reset_phy; if (pci->link_gen == 2) { /* Allow Gen2 mode after the link is up. */ @@ -872,7 +874,9 @@ static int imx6_pcie_start_link(struct dw_pcie *pci) } /* Make sure link training is finished as well! */ - dw_pcie_wait_for_link(pci); + ret = dw_pcie_wait_for_link(pci); + if (ret) + goto err_reset_phy; } else { dev_info(dev, "Link: Gen2 disabled\n"); } @@ -886,7 +890,7 @@ err_reset_phy: dw_pcie_readl_dbi(pci, PCIE_PORT_DEBUG0), dw_pcie_readl_dbi(pci, PCIE_PORT_DEBUG1)); imx6_pcie_reset_phy(imx6_pcie); - return ret; + return 0; } static int imx6_pcie_host_init(struct dw_pcie_rp *pp) @@ -1027,10 +1031,7 @@ static int imx6_pcie_resume_noirq(struct device *dev) return ret; dw_pcie_setup_rc(pp); - ret = imx6_pcie_start_link(imx6_pcie->pci); - if (ret < 0) - dev_info(dev, "pcie link is down after resume.\n"); - + imx6_pcie_start_link(imx6_pcie->pci); return 0; } |