linux-kernel - [PATCH 2/7] PCI: xilinx-nwl: Fix off-by-one

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Date: Mon, 22 Apr 2024 15:58:59 -0400
From: Sean Anderson <sean.anderson@...ux.dev>
To: Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>,
	linux-pci@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Thippeswamy Havalige <thippeswamy.havalige@....com>,
	Michal Simek <michal.simek@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Sean Anderson <sean.anderson@...ux.dev>,
	stable@...r.kernel.org,
	Bharat Kumar Gogada <bharatku@...inx.com>
Subject: [PATCH 2/7] PCI: xilinx-nwl: Fix off-by-one

IRQs start at 0, so we don't need to subtract 1.

Fixes: 9a181e1093af ("PCI: xilinx-nwl: Modify IRQ chip for legacy interrupts")
Cc: <stable@...r.kernel.org>
Signed-off-by: Sean Anderson <sean.anderson@...ux.dev>
---

 drivers/pci/controller/pcie-xilinx-nwl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
index 0408f4d612b5..437927e3bcca 100644
--- a/drivers/pci/controller/pcie-xilinx-nwl.c
+++ b/drivers/pci/controller/pcie-xilinx-nwl.c
@@ -371,7 +371,7 @@ static void nwl_mask_intx_irq(struct irq_data *data)
 	u32 mask;
 	u32 val;
 
-	mask = 1 << (data->hwirq - 1);
+	mask = 1 << data->hwirq;
 	raw_spin_lock_irqsave(&pcie->leg_mask_lock, flags);
 	val = nwl_bridge_readl(pcie, MSGF_LEG_MASK);
 	nwl_bridge_writel(pcie, (val & (~mask)), MSGF_LEG_MASK);
@@ -385,7 +385,7 @@ static void nwl_unmask_intx_irq(struct irq_data *data)
 	u32 mask;
 	u32 val;
 
-	mask = 1 << (data->hwirq - 1);
+	mask = 1 << data->hwirq;
 	raw_spin_lock_irqsave(&pcie->leg_mask_lock, flags);
 	val = nwl_bridge_readl(pcie, MSGF_LEG_MASK);
 	nwl_bridge_writel(pcie, (val | mask), MSGF_LEG_MASK);
-- 
2.35.1.1320.gc452695387.dirty