linux-kernel - Re: [PATCH v2] PCI: xilinx-xdma: Enable INTx interrupts

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Message-ID: <akia22ulvkho753escdkhmunx3wdkgzk4hoosbrdpg3flfucxd@clwwh2hkt6wl>
Date: Sun, 19 Oct 2025 12:40:24 +0530
From: Manivannan Sadhasivam <mani@...nel.org>
To: Ravi Kumar Bandi <ravib@...zon.com>, thippeswamy.havalige@....com
Cc: lpieralisi@...nel.org, bhelgaas@...gle.com, linux-pci@...r.kernel.org, 
	kwilczynski@...nel.org, robh@...nel.org, michal.simek@....com, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH v2] PCI: xilinx-xdma: Enable INTx interrupts

On Mon, Sep 29, 2025 at 07:38:01PM +0530, Manivannan Sadhasivam wrote:
> On Sat, Sep 20, 2025 at 10:52:32PM +0000, Ravi Kumar Bandi wrote:
> > The pcie-xilinx-dma-pl driver does not enable INTx interrupts
> > after initializing the port, preventing INTx interrupts from
> > PCIe endpoints from flowing through the Xilinx XDMA root port
> > bridge. This issue affects kernel 6.6.0 and later versions.
> > 
> > This patch allows INTx interrupts generated by PCIe endpoints
> > to flow through the root port. Tested the fix on a board with
> > two endpoints generating INTx interrupts. Interrupts are
> > properly detected and serviced. The /proc/interrupts output
> > shows:
> > 
> > [...]
> > 32:        320          0  pl_dma:RC-Event  16 Level     400000000.axi-pcie, azdrv
> > 52:        470          0  pl_dma:RC-Event  16 Level     500000000.axi-pcie, azdrv
> > [...]
> > 
> > Changes since v1::
> > - Fixed commit message per reviewer's comments
> > 
> > Fixes: 8d786149d78c ("PCI: xilinx-xdma: Add Xilinx XDMA Root Port driver")
> > Cc: stable@...r.kernel.org
> > Signed-off-by: Ravi Kumar Bandi <ravib@...zon.com>
> 
> Thippeswamy, are you fine with this change?
> 

Since there was no reply for a while and the change looked good to me, I've
merged this patch.

- Mani

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