linux-kernel - [PATCH] PCI: xilinx-nwl: Fix Multi MSI data programming

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Date:   Wed, 13 Feb 2019 19:55:39 +0530
From:   Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
To:     <bhelgaas@...gle.com>, <lorenzo.pieralisi@....com>
CC:     <linux-pci@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
Subject: [PATCH] PCI: xilinx-nwl: Fix Multi MSI data programming

The current Multi MSI data programming fails if a
end point is connected with switch.

Fix Multi MSI data, by programming data with required alignment.

Signed-off-by: Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
---
 drivers/pci/controller/pcie-xilinx-nwl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
index 81538d7..36669c5 100644
--- a/drivers/pci/controller/pcie-xilinx-nwl.c
+++ b/drivers/pci/controller/pcie-xilinx-nwl.c
@@ -484,7 +484,7 @@ static int nwl_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
 
 	mutex_lock(&msi->lock);
 	bit = bitmap_find_next_zero_area(msi->bitmap, INT_PCI_MSI_NR, 0,
-					 nr_irqs, 0);
+					 nr_irqs, nr_irqs - 1);
 	if (bit >= INT_PCI_MSI_NR) {
 		mutex_unlock(&msi->lock);
 		return -ENOSPC;
-- 
2.7.4