linux-kernel - RE: [PATCH] fpga: dfl: afu: Corrected error handling levels

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Message-ID: <DM6PR11MB38193B495FB1DB4697F0094F85BC0@DM6PR11MB3819.namprd11.prod.outlook.com>
Date:   Thu, 14 May 2020 06:06:13 +0000
From:   "Wu, Hao" <hao.wu@...el.com>
To:     Souptick Joarder <jrdr.linux@...il.com>
CC:     "mdf@...nel.org" <mdf@...nel.org>,
        "linux-fpga@...r.kernel.org" <linux-fpga@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Xu, Yilun" <yilun.xu@...el.com>
Subject: RE: [PATCH] fpga: dfl: afu: Corrected error handling levels

> -----Original Message-----
> From: Xu, Yilun <yilun.xu@...el.com>
> Sent: Thursday, May 14, 2020 10:30 AM
> To: Souptick Joarder <jrdr.linux@...il.com>
> Cc: Wu, Hao <hao.wu@...el.com>; mdf@...nel.org; linux-
> fpga@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH] fpga: dfl: afu: Corrected error handling levels
> 
> The patch looks good to me.
> 
> Maybe we could add the Fixes tag:
>   Fixes: fa8dda1edef9 (fpga: dfl: afu: add
> DFL_FPGA_PORT_DMA_MAP/UNMAP ioctls support)

Thanks for catching this problem.

With this line,
Acked-by: Wu Hao <hao.wu@...el.com>

Thanks!
Hao

> 
> Thanks,
> Yilun
> 
> On Thu, May 14, 2020 at 12:52:05AM +0530, Souptick Joarder wrote:
> > Corrected error handling goto sequnece. Level put_pages should
> > be called when pinned pages >= 0 && pinned != npages. Level
> > free_pages should be called when pinned pages < 0.
> >
> > Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
> > ---
> >  drivers/fpga/dfl-afu-dma-region.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/fpga/dfl-afu-dma-region.c b/drivers/fpga/dfl-afu-dma-
> region.c
> > index 62f9244..5942343 100644
> > --- a/drivers/fpga/dfl-afu-dma-region.c
> > +++ b/drivers/fpga/dfl-afu-dma-region.c
> > @@ -61,10 +61,10 @@ static int afu_dma_pin_pages(struct
> dfl_feature_platform_data *pdata,
> >  				     region->pages);
> >  	if (pinned < 0) {
> >  		ret = pinned;
> > -		goto put_pages;
> > +		goto free_pages;
> >  	} else if (pinned != npages) {
> >  		ret = -EFAULT;
> > -		goto free_pages;
> > +		goto put_pages;
> >  	}
> >
> >  	dev_dbg(dev, "%d pages pinned\n", pinned);
> > --
> > 1.9.1