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

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Date:   Thu, 14 Feb 2019 11:30:56 +0000
From:   Bharat Kumar Gogada <bharatku@...inx.com>
To:     "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>
CC:     "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] PCI: xilinx-nwl: Fix Multi MSI data programming

> Subject: Re: [PATCH] PCI: xilinx-nwl: Fix Multi MSI data programming
> 
> On Wed, Feb 13, 2019 at 07:55:39PM +0530, Bharat Kumar Gogada wrote:
> > 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.
> 
> I have no idea what this means. If you are fixing a bug describe it properly
> and provide a Fixes: tag with the commit you are fixing.
> 
Thanks Lorenzo for your time. Will add above details and re send.

Regards,
Bharat
> 
> 
> > 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
> >