linux-kernel - Re: [PATCH] virtio-fs: fix multiple tag support

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Message-ID: <20190320020400.ka5z7swyv27be656@US-160370MP2.local>
Date:   Tue, 19 Mar 2019 19:04:01 -0700
From:   Liu Bo <bo.liu@...ux.alibaba.com>
To:     Vivek Goyal <vgoyal@...hat.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Stefan Hajnoczi <stefanha@...hat.com>,
        "Dr. David Alan Gilbert" <dgilbert@...hat.com>,
        Miklos Szeredi <miklos@...redi.hu>
Subject: Re: [PATCH] virtio-fs: fix multiple tag support

On Tue, Mar 19, 2019 at 04:26:54PM -0400, Vivek Goyal wrote:
> On Sun, Mar 17, 2019 at 08:35:21AM +0800, Liu Bo wrote:
> > While doing memremap from pci_dev's system bus address to kernel virtual
> > address, we assign a wrong value to the %end of pgmap.res, which ends up
> > with a wrong resource size in the process of memremap, and that further
> > prevent the second virtiofs pci device from being probed successfully.
> > 
> > Signed-off-by: Liu Bo <bo.liu@...ux.alibaba.com>
> 
> Hi Liu Bo,
> 
> Thanks for the fix. This seems right. I will fix it in my internal
> branch. These patches are not upstream yet. Will fold this into
> existing patch for the next posting.
>

Feel free to fold it, and I'm looking forward to the 1.0 release.

thanks,
-liubo

> Thanks
> Vivek
> 
> > ---
> >  fs/fuse/virtio_fs.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
> > index 88b00055589b..7abf2187d85f 100644
> > --- a/fs/fuse/virtio_fs.c
> > +++ b/fs/fuse/virtio_fs.c
> > @@ -713,7 +713,7 @@ static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs)
> >  	pgmap->res = (struct resource){
> >  		.name = "virtio-fs dax window",
> >  		.start = phys_addr,
> > -		.end = phys_addr + cache_len,
> > +		.end = phys_addr + cache_len - 1,
> >  	};
> >  
> >  	fs->window_kaddr = devm_memremap_pages(&pci_dev->dev, pgmap);
> > -- 
> > 2.20.1.2.gb21ebb6
> >