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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


  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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