From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To: Kishon Vijay Abraham I <kishon@ti.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Rob Herring <robh@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Jingoo Han <jingoohan1@gmail.com>,
Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
Ard Biesheuvel <ardb@kernel.org>
Cc: linux-omap@vger.kernel.org, linux-pci@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v4 1/2] PCI: dwc: Skip PCIE_MSI_INTR0* programming if MSI is disabled
Date: Tue, 29 Sep 2020 18:34:31 +0800 [thread overview]
Message-ID: <20200929183431.0efda17c@xhacker.debian> (raw)
In-Reply-To: <20200929183403.060d1853@xhacker.debian>
If MSI is disabled, there's no need to program PCIE_MSI_INTR0_MASK
and PCIE_MSI_INTR0_ENABLE registers.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
---
drivers/pci/controller/dwc/pcie-designware-host.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 9dafecba347f..f08f4d97f321 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -632,7 +632,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
dw_pcie_setup(pci);
- if (!pp->ops->msi_host_init) {
+ if (pci_msi_enabled() && !pp->ops->msi_host_init) {
num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
/* Initialize IRQ Status array */
--
2.28.0
next prev parent reply other threads:[~2020-09-29 10:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 10:34 [PATCH v4 0/2] PCI: dwc: fix two MSI issues Jisheng Zhang
2020-09-29 10:34 ` Jisheng Zhang [this message]
2020-09-29 10:34 ` [PATCH v4 2/2] PCI: dwc: Fix MSI page leakage in suspend/resume Jisheng Zhang
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