From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To: Bjorn Helgaas <helgaas@kernel.org>,
Jingoo Han <jingoohan1@gmail.com>,
Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Rob Herring <robh@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3] PCI: dwc: move dw_pcie_msi_init() to dw_pcie_setup_rc()
Date: Thu, 25 Mar 2021 15:26:04 +0800 [thread overview]
Message-ID: <20210325152604.6e79deba@xhacker.debian> (raw)
If the host which makes use of IP's integrated MSI Receiver losts
power during suspend, we need to reinit the RC and MSI Receiver in
resume. But after we move dw_pcie_msi_init() into the core, we have no
API to do so. Usually the dwc users need to call dw_pcie_setup_rc() to
reinit the RC, we can solve this problem by moving dw_pcie_msi_init()
to dw_pcie_setup_rc().
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
---
Since v2:
- rewrite the commit msg
Since v1:
- collect Reviewed-by tag
drivers/pci/controller/dwc/pcie-designware-host.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 7e55b2b66182..e6c274f4485c 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -400,7 +400,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
}
dw_pcie_setup_rc(pp);
- dw_pcie_msi_init(pp);
if (!dw_pcie_link_up(pci) && pci->ops && pci->ops->start_link) {
ret = pci->ops->start_link(pci);
@@ -551,6 +550,8 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
}
}
+ dw_pcie_msi_init(pp);
+
/* Setup RC BARs */
dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004);
dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000);
--
2.30.1
next reply other threads:[~2021-03-25 7:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 7:26 Jisheng Zhang [this message]
2021-04-15 15:09 ` [PATCH v3] PCI: dwc: move dw_pcie_msi_init() to dw_pcie_setup_rc() Lorenzo Pieralisi
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