linux-kernel - Re: [PATCH v3] uacce: use sysfs

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Message-ID: <YbdBvNzmZn9twnej@kroah.com>
Date:   Mon, 13 Dec 2021 13:51:08 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     "yekai(A)" <yekai13@...wei.com>
Cc:     linux-accelerators@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        linuxarm@...wei.com, zhangfei.gao@...aro.org,
        wangzhou1@...ilicon.com
Subject: Re: [PATCH v3] uacce: use sysfs_emit instead of sprintf

On Mon, Dec 13, 2021 at 08:05:56PM +0800, yekai(A) wrote:
> 
> 
> On 2021/12/6 18:47, Kai Ye wrote:
> > Use the sysfs_emit to replace sprintf. sprintf may cause
> > output defect in sysfs content, it is better to use new
> > added sysfs_emit function which knows the size of the
> > temporary buffer.
> > 
> > Signed-off-by: Kai Ye <yekai13@...wei.com>
> > ---
> > changes v1->v2:
> > 	modfiy the comments.
> > changes v2->v3:
> > 	modify the "changes" lines.
> > 
> >  drivers/misc/uacce/uacce.c | 12 ++++++------
> >  1 file changed, 6 insertions(+), 6 deletions(-)
> > 
> > diff --git a/drivers/misc/uacce/uacce.c b/drivers/misc/uacce/uacce.c
> > index 488eeb2811ae..281c54003edc 100644
> > --- a/drivers/misc/uacce/uacce.c
> > +++ b/drivers/misc/uacce/uacce.c
> > @@ -289,7 +289,7 @@ static ssize_t api_show(struct device *dev,
> >  {
> >  	struct uacce_device *uacce = to_uacce_device(dev);
> > 
> > -	return sprintf(buf, "%s\n", uacce->api_ver);
> > +	return sysfs_emit(buf, "%s\n", uacce->api_ver);
> >  }
> > 
> >  static ssize_t flags_show(struct device *dev,
> > @@ -297,7 +297,7 @@ static ssize_t flags_show(struct device *dev,
> >  {
> >  	struct uacce_device *uacce = to_uacce_device(dev);
> > 
> > -	return sprintf(buf, "%u\n", uacce->flags);
> > +	return sysfs_emit(buf, "%u\n", uacce->flags);
> >  }
> > 
> >  static ssize_t available_instances_show(struct device *dev,
> > @@ -309,7 +309,7 @@ static ssize_t available_instances_show(struct device *dev,
> >  	if (!uacce->ops->get_available_instances)
> >  		return -ENODEV;
> > 
> > -	return sprintf(buf, "%d\n",
> > +	return sysfs_emit(buf, "%d\n",
> >  		       uacce->ops->get_available_instances(uacce));
> >  }
> > 
> > @@ -318,7 +318,7 @@ static ssize_t algorithms_show(struct device *dev,
> >  {
> >  	struct uacce_device *uacce = to_uacce_device(dev);
> > 
> > -	return sprintf(buf, "%s\n", uacce->algs);
> > +	return sysfs_emit(buf, "%s\n", uacce->algs);
> >  }
> > 
> >  static ssize_t region_mmio_size_show(struct device *dev,
> > @@ -326,7 +326,7 @@ static ssize_t region_mmio_size_show(struct device *dev,
> >  {
> >  	struct uacce_device *uacce = to_uacce_device(dev);
> > 
> > -	return sprintf(buf, "%lu\n",
> > +	return sysfs_emit(buf, "%lu\n",
> >  		       uacce->qf_pg_num[UACCE_QFRT_MMIO] << PAGE_SHIFT);
> >  }
> > 
> > @@ -335,7 +335,7 @@ static ssize_t region_dus_size_show(struct device *dev,
> >  {
> >  	struct uacce_device *uacce = to_uacce_device(dev);
> > 
> > -	return sprintf(buf, "%lu\n",
> > +	return sysfs_emit(buf, "%lu\n",
> >  		       uacce->qf_pg_num[UACCE_QFRT_DUS] << PAGE_SHIFT);
> >  }
> > 
> > 
> 
> Hi Hartman
> 
> Could you help to take this patch?

It has only been 1 week.  It is in my "to review" queue, please be
patient.  Patches that actually fix things and are new features are
always a higher priority than changes like this that have no functional
change at all.

thanks,

greg k-h