linux-kernel - Re: [PATCH 001/001] drivers/staging/vt6656/main

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Date:   Fri, 31 Mar 2017 19:45:09 -0700
From:   Joe Perches <joe@...ches.com>
To:     Randy Dunlap <rdunlap@...radead.org>,
        Chewie Lin <linsh@...gonstate.edu>, greg@...ah.com,
        forest@...ttletooquiet.net, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 001/001] drivers/staging/vt6656/main_usb.c: checkpatch
 warning

On Fri, 2017-03-31 at 19:15 -0700, Randy Dunlap wrote:
> On 03/31/17 18:59, Chewie Lin wrote:
> > Replace string with formatted arguments in the dev_warn() call. It removes
> > the checkpatch warning:
> > 
> > 	WARNING: Prefer using "%s", __func__ to embedded function names
> > 	#417: FILE: main_usb.c:417:
> > 	+			 "usb_device_reset fail status=%d\n", status);
> > 
> > 	total: 0 errors, 1 warnings, 1058 lines checked
> > 
> > And after fix:
> > 
> > 	main_usb.c has no obvious style problems and is ready for submission.
> > 
> > Signed-off-by: Chewie Lin <linsh@...gonstate.edu>
> > ---
> >  drivers/staging/vt6656/main_usb.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/staging/vt6656/main_usb.c b/drivers/staging/vt6656/main_usb.c
> > index 9e074e9..2d9e7af 100644
> > --- a/drivers/staging/vt6656/main_usb.c
> > +++ b/drivers/staging/vt6656/main_usb.c
> > @@ -414,7 +414,7 @@ static void usb_device_reset(struct vnt_private *priv)
> >  	status = usb_reset_device(priv->usb);
> >  	if (status)
> >  		dev_warn(&priv->usb->dev,
> > -			 "usb_device_reset fail status=%d\n", status);
> > +			 "%s=%d\n", "usb_device_reset fail status", status);
> >  }
> >  
> >  static void vnt_free_int_bufs(struct vnt_private *priv)
> > 
> 
> As other people have said:
> 
> This function is usb_device_reset().  If that function name string is to be
> used in the message, it should be done so by using __func__.
> See http://marc.info/?l=linux-driver-devel&m=149095639202492&w=2
> 
> Or is the called (failing) function name is to be kept in the message (as it
> is currently), then the message should contain "usb_reset_device" instead of
> "usb_device_reset".  See http://marc.info/?l=linux-driver-devel&m=149098680312723&w=2

If this is to be changed at all, I suggest
just getting rid of the function.
---
 drivers/staging/vt6656/main_usb.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/vt6656/main_usb.c b/drivers/staging/vt6656/main_usb.c
index 9e074e9daf4e..799aeeb6812d 100644
--- a/drivers/staging/vt6656/main_usb.c
+++ b/drivers/staging/vt6656/main_usb.c
@@ -407,16 +407,6 @@ static void vnt_free_rx_bufs(struct vnt_private *priv)
 	}
 }
 
-static void usb_device_reset(struct vnt_private *priv)
-{
-	int status;
-
-	status = usb_reset_device(priv->usb);
-	if (status)
-		dev_warn(&priv->usb->dev,
-			 "usb_device_reset fail status=%d\n", status);
-}
-
 static void vnt_free_int_bufs(struct vnt_private *priv)
 {
 	kfree(priv->int_buf.data_buf);
@@ -995,7 +985,9 @@ vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
 
 	SET_IEEE80211_DEV(priv->hw, &intf->dev);
 
-	usb_device_reset(priv);
+	rc = usb_reset_device(priv->usb);
+	if (rc)
+		dev_warn(&priv->usb->dev, "usb_reset_device failed: %d\n", rc);
 
 	clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
 	vnt_reset_command_timer(priv);