From: Richard Zhu <hongxing.zhu@nxp.com>
To: l.stach@pengutronix.de, bhelgaas@google.com, robh+dt@kernel.org,
broonie@kernel.org, lorenzo.pieralisi@arm.com,
festevam@gmail.com, francesco.dolcini@toradex.com
Cc: hongxing.zhu@nxp.com, linux-pci@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, kernel@pengutronix.de,
linux-imx@nxp.com
Subject: [PATCH v15 12/17] PCI: imx6: Mark the link down as non-fatal error
Date: Thu, 14 Jul 2022 15:31:04 +0800 [thread overview]
Message-ID: <1657783869-19194-13-git-send-email-hongxing.zhu@nxp.com> (raw)
In-Reply-To: <1657783869-19194-1-git-send-email-hongxing.zhu@nxp.com>
If the PCIe link is down, return zero from imx6_pcie_start_link() so the
driver will probe successfully.
[bhelgaas: drop imx6_pcie_start_link() return value check here instead of
in next patch, pointed out by Lucas]
Link: https://lore.kernel.org/r/1656645935-1370-13-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>
---
drivers/pci/controller/dwc/pci-imx6.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index d263574e5c85..3ac4f2aa91c5 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 @@ static int imx6_pcie_start_link(struct dw_pcie *pci)
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 pcie_port *pp)
@@ -1028,10 +1032,7 @@ 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;
}
#endif
--
2.25.1
next prev parent reply other threads:[~2022-07-14 7:48 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-14 7:30 [PATCH v15 0/17] PCI: imx6: refine codes and add the error propagation Richard Zhu
2022-07-14 7:30 ` [PATCH v15 01/17] PCI: imx6: Move imx6_pcie_grp_offset(), imx6_pcie_configure_type() earlier Richard Zhu
2022-07-14 7:30 ` [PATCH v15 02/17] PCI: imx6: Move PHY management functions together Richard Zhu
2022-07-14 7:30 ` [PATCH v15 03/17] PCI: imx6: Move imx6_pcie_enable_ref_clk() earlier Richard Zhu
2022-07-14 7:30 ` [PATCH v15 04/17] PCI: imx6: Move imx6_pcie_clk_disable() earlier Richard Zhu
2022-07-14 7:30 ` [PATCH v15 05/17] PCI: imx6: Factor out ref clock disable to match enable Richard Zhu
2022-07-14 7:30 ` [PATCH v15 06/17] PCI: imx6: Collect clock enables in imx6_pcie_clk_enable() Richard Zhu
2022-07-14 7:30 ` [PATCH v15 07/17] PCI: imx6: Propagate .host_init() errors to caller Richard Zhu
2022-07-14 7:31 ` [PATCH v15 08/17] PCI: imx6: Disable i.MX6QDL clock when disabling ref clocks Richard Zhu
2022-07-14 7:31 ` [PATCH v15 09/17] PCI: imx6: Call host init function directly in resume Richard Zhu
2022-07-14 7:31 ` [PATCH v15 10/17] PCI: imx6: Turn off regulator when system is in suspend mode Richard Zhu
2022-07-14 7:31 ` [PATCH v15 11/17] PCI: imx6: Move regulator enable out of imx6_pcie_deassert_core_reset() Richard Zhu
2022-07-14 7:31 ` Richard Zhu [this message]
2022-07-14 7:31 ` [PATCH v15 13/17] PCI: imx6: Reduce resume time by only starting link if it was up before suspend Richard Zhu
2022-07-14 7:31 ` [PATCH v15 14/17] PCI: imx6: Do not hide PHY driver callbacks and refine the error handling Richard Zhu
2022-07-14 7:31 ` [PATCH v15 15/17] PCI: imx6: Disable clocks in reverse order of enable Richard Zhu
2022-07-14 7:31 ` [PATCH v15 16/17] PCI: imx6: Move the imx6_pcie_ltssm_disable() earlier Richard Zhu
2022-07-14 7:31 ` [PATCH v15 17/17] PCI: imx6: Reformat suspend callback to keep symmetric with resume Richard Zhu
2022-07-18 13:19 ` Guenter Roeck
2022-07-19 23:10 ` Bjorn Helgaas
2022-07-14 17:10 ` [PATCH v15 0/17] PCI: imx6: refine codes and add the error propagation Bjorn Helgaas
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