From: Bjorn Helgaas <helgaas@kernel.org> To: Richard Zhu <hongxing.zhu@nxp.com>, Lucas Stach <l.stach@pengutronix.de>, Rob Herring <robh+dt@kernel.org>, Mark Brown <broonie@kernel.org>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Fabio Estevam <festevam@gmail.com>, Francesco Dolcini <francesco.dolcini@toradex.com> Cc: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, linux-imx@nxp.com, Bjorn Helgaas <bhelgaas@google.com> Subject: [PATCH v12 10/13] PCI: imx6: Mark the link down as non-fatal error Date: Wed, 15 Jun 2022 18:15:48 -0500 [thread overview] Message-ID: <20220615231551.1054753-11-helgaas@kernel.org> (raw) In-Reply-To: <20220615231551.1054753-1-helgaas@kernel.org> From: Richard Zhu <hongxing.zhu@nxp.com> Let the driver probe successfully, return zero in imx6_pcie_start_link() when PCIe link is down. Link: https://lore.kernel.org/r/1655189942-12678-7-git-send-email-hongxing.zhu@nxp.com Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> --- drivers/pci/controller/dwc/pci-imx6.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 537b8a2e0e3b..7d3592540b8a 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -855,7 +855,9 @@ 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. */ @@ -891,7 +893,9 @@ 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"); } @@ -905,7 +909,7 @@ 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) -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Bjorn Helgaas <helgaas@kernel.org> To: Richard Zhu <hongxing.zhu@nxp.com>, Lucas Stach <l.stach@pengutronix.de>, Rob Herring <robh+dt@kernel.org>, Mark Brown <broonie@kernel.org>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Fabio Estevam <festevam@gmail.com>, Francesco Dolcini <francesco.dolcini@toradex.com> Cc: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, linux-imx@nxp.com, Bjorn Helgaas <bhelgaas@google.com> Subject: [PATCH v12 10/13] PCI: imx6: Mark the link down as non-fatal error Date: Wed, 15 Jun 2022 18:15:48 -0500 [thread overview] Message-ID: <20220615231551.1054753-11-helgaas@kernel.org> (raw) In-Reply-To: <20220615231551.1054753-1-helgaas@kernel.org> From: Richard Zhu <hongxing.zhu@nxp.com> Let the driver probe successfully, return zero in imx6_pcie_start_link() when PCIe link is down. Link: https://lore.kernel.org/r/1655189942-12678-7-git-send-email-hongxing.zhu@nxp.com Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> --- drivers/pci/controller/dwc/pci-imx6.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 537b8a2e0e3b..7d3592540b8a 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -855,7 +855,9 @@ 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. */ @@ -891,7 +893,9 @@ 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"); } @@ -905,7 +909,7 @@ 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) -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-06-15 23:17 UTC|newest] Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-06-15 23:15 [PATCH v12 00/13] PCI: imx6: refine codes and add the error propagation Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-15 23:15 ` [PATCH v12 01/13] PCI: imx6: Move imx6_pcie_grp_offset(), imx6_pcie_configure_type() earlier Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-16 2:23 ` Hongxing Zhu 2022-06-16 2:23 ` Hongxing Zhu 2022-06-15 23:15 ` [PATCH v12 02/13] PCI: imx6: Move PHY management functions together Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-16 2:23 ` Hongxing Zhu 2022-06-16 2:23 ` Hongxing Zhu 2022-06-15 23:15 ` [PATCH v12 03/13] PCI: imx6: Move imx6_pcie_enable_ref_clk() earlier Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-16 2:23 ` Hongxing Zhu 2022-06-16 2:23 ` Hongxing Zhu 2022-06-15 23:15 ` [PATCH v12 04/13] PCI: imx6: Move imx6_pcie_clk_disable() earlier Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-15 23:15 ` [PATCH v12 05/13] PCI: imx6: Factor out ref clock disable to match enable Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-16 2:23 ` Hongxing Zhu 2022-06-16 2:23 ` Hongxing Zhu 2022-06-15 23:15 ` [PATCH v12 06/13] PCI: imx6: Collect clock enables in imx6_pcie_clk_enable() Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-15 23:15 ` [PATCH v12 07/13] PCI: imx6: Propagate .host_init() errors to caller Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-15 23:15 ` [PATCH v12 08/13] PCI: imx6: Disable i.MX6QDL clock when disabling ref clocks Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-15 23:15 ` [PATCH v12 09/13] PCI: imx6: Turn off regulator when system is in suspend mode Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-15 23:30 ` Bjorn Helgaas 2022-06-15 23:30 ` Bjorn Helgaas 2022-06-16 2:23 ` Hongxing Zhu 2022-06-16 2:23 ` Hongxing Zhu 2022-06-16 15:56 ` Bjorn Helgaas 2022-06-16 15:56 ` Bjorn Helgaas 2022-06-17 5:57 ` Hongxing Zhu 2022-06-17 5:57 ` Hongxing Zhu 2022-06-15 23:15 ` Bjorn Helgaas [this message] 2022-06-15 23:15 ` [PATCH v12 10/13] PCI: imx6: Mark the link down as non-fatal error Bjorn Helgaas 2022-06-15 23:15 ` [PATCH v12 11/13] PCI: imx6: Reduce resume time by only starting link if it was up before suspend Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-15 23:15 ` [PATCH v12 12/13] PCI: imx6: Do not hide phy driver callbacks and refine the error handling Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-15 23:15 ` [PATCH v12 13/13] PCI: imx6: Disable clocks in reverse order of enable Bjorn Helgaas 2022-06-15 23:15 ` Bjorn Helgaas 2022-06-15 23:27 ` Bjorn Helgaas 2022-06-15 23:27 ` Bjorn Helgaas 2022-06-16 2:23 ` Hongxing Zhu 2022-06-16 2:23 ` Hongxing Zhu
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