linux-kernel - Re: [PATCH RESEND] staging: rtl8192u: ieee80211: Fix sparse endianness warnings

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Message-ID: <20150601015320.GA24139@kroah.com>
Date:	Mon, 1 Jun 2015 10:53:20 +0900
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Gaston Gonzalez <gascoar@...il.com>
Cc:	cristina.opriceana@...il.com, hamohammed.sa@...il.com,
	gdonald@...il.com, mahfouz.saif.elyazal@...il.com,
	paul.gortmaker@...driver.com, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND] staging: rtl8192u: ieee80211: Fix sparse
 endianness warnings

On Sun, May 31, 2015 at 10:41:52PM -0300, Gaston Gonzalez wrote:
> On Mon, Jun 01, 2015 at 08:24:17AM +0900, Greg KH wrote:
> > On Sun, May 31, 2015 at 08:07:21PM -0300, Gaston Gonzalez wrote:
> > > On Mon, Jun 01, 2015 at 07:17:39AM +0900, Greg KH wrote:
> > > > On Sun, May 31, 2015 at 12:17:48PM -0300, Gaston Gonzalez wrote:
> > > > > Fix the following sparse warnings:
> > > > > 
> > > > > drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:663:32: warning: incorrect type in assignment (different base types)
> > > > > drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:663:32:    expected restricted __le16 [usertype] frame_ctl
> > > > > drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:663:32:    got int
> > > > > drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:664:50: warning: invalid assignment: |=
> > > > > drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:664:50:    left side has type restricted __le16
> > > > > drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:664:50:    right side has type int
> > > > > 
> > > > > 
> > > > > Signed-off-by: Gaston Gonzalez <gascoar@...il.com>
> > > > > ---
> > > > >  drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c | 5 +++--
> > > > >  1 file changed, 3 insertions(+), 2 deletions(-)
> > > > 
> > > > Still doesn't apply, but this might be a git bug, see below:
> > > > 
> > > > > diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
> > > > > index d2e8b12..0477ba1 100644
> > > > > --- a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
> > > > > +++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
> > > > > @@ -660,2 +660,2 @@ inline struct sk_buff *ieee80211_authentication_req(struct ieee80211_network *be
> > > > >  	auth = (struct ieee80211_authentication *)
> > > > >  		skb_put(skb, sizeof(struct ieee80211_authentication));
> > > > > 
> > > > > -	auth->header.frame_ctl = IEEE80211_STYPE_AUTH;
> > > > > -	if (challengelen) auth->header.frame_ctl |= IEEE80211_FCTL_WEP;
> > > > > +	auth->header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_AUTH);
> > > > > +	if (challengelen)
> > > > > +		auth->header.frame_ctl |= cpu_to_le16(IEEE80211_FCTL_WEP);
> > > > > 
> > > > >  	auth->header.duration_id = 0x013a; //FIXME
> > > > > 
> > > > > --
> > > > > 2.1.4
> > > > 
> > > > This patch is not created properly.  Did you edit it by hand?  If not,
> > > > we need to report a bug as the diff is obviously wrong, look at the @@@
> > > > line.
> > > > 
> > > > Can you update your version of git to see if it's fixed there?
> > > > 
> > > > Also, patch tells you that this is broken:
> > > > 
> > > > checking file drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
> > > > patch: **** malformed patch at line 132:                skb_put(skb, sizeof(struct ieee80211_authentication));
> > > 
> > > Greg,
> > > 
> > > The patch was prepared using git format-patch. The git version I'm using:
> > > 
> > > gaston22:\-$ git --version 
> > > git version 2.1.4
> > > 
> > > I did deleted 4 whitespaces by hand after running checkpatch.pl on the patch.
> > > Could that drive the issue? However, I could properly apply the patch using 'git
> > > am' from an email and get the git log right.
> > 
> > Yes, but is there really a commit there?  That's what messed me up last
> > time, git applied it, but with no actual diff (which is probably a bug
> > too, just a different one...)
> > 
> 
> Yes, there was a commit. In fact the patch prepare: git format-patch -1
> 
> > And if you edited it by hand, that might explain the issue, what did the
> > "original" patch look like?
> 
> Attached the original patch I submitted:
> 0001-Regen-ieee80211_softmac.c-endianness-fix-patch.patch

Which is broken.

> Attached is also the patch without the hand-edited deletions:
> 
> ieee80211_softmac_fixes_v3.patch

That patch is correct.

Why did you edit the patch metadata in a way that was incorrect?

> 
> My steps once having this were:
> 
> - run perl checkpatch -f 
> - I got total: 4 errors, 0 warnings, 28 lines checked. The 4 warnings were extra white
>   spaces. 
> - Delete the spaces
> - git send-email --annotate Patch

You did a few other things here, you hand-edited the patch, which broke
it.

Yes, 'git am' does apply it, but not really, as there's a bug in git
that you see I notified the git developers about.  So I still can't
apply this patch, please resend it in a way that is not broken, like
your attachment here :)

thanks,

greg k-h
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