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PCI: dwc: Fail dw_pcie_host_init() if dw_pcie_wait_for_link() returns -ETIMEDOUT

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The dw_pcie_wait_for_link() API now distinguishes link failures more
precisely:

-ENODEV: Device not found on the bus.
-EIO: Device found but inactive.
-ETIMEDOUT: Link failed to come up.

Out of these three errors, only -ETIMEDOUT represents a definitive link
failure since it signals that something is wrong with the link. For the
other two errors, there is a possibility that the link might come up later.
So fail dw_pcie_host_init() if -ETIMEDOUT is returned and skip the failure
otherwise.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Link: https://patch.msgid.link/20260120-pci-dwc-suspend-rework-v4-5-2f32d5082549@oss.qualcomm.com
This commit is contained in:
Manivannan Sadhasivam 2026-01-20 23:17:44 +05:30 committed by Manivannan Sadhasivam
parent d266f63b38
commit 86cbb7a810
1 changed files with 7 additions and 2 deletions
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9
drivers/pci/controller/dwc/pcie-designware-host.c
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@ -675,8 +675,13 @@ int dw_pcie_host_init(struct dw_pcie_rp *pp)
goto err_remove_edma;
}
/* Ignore errors, the link may come up later */
dw_pcie_wait_for_link(pci);
/*
* Only fail on timeout error. Other errors indicate the device may
* become available later, so continue without failing.
*/
ret = dw_pcie_wait_for_link(pci);
if (ret == -ETIMEDOUT)
goto err_stop_link;
ret = pci_host_probe(bridge);
if (ret)