linux-kernel - Re: [PATCH] staging: r8188eu: replace rtw

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Message-ID: <20190914195202.GC18977@kadam>
Date:   Sat, 14 Sep 2019 22:52:02 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Ivan Safonov <insafonov@...il.com>
Cc:     devel@...verdev.osuosl.org,
        Florian Büstgens <flbue@....de>,
        Nishka Dasgupta <nishkadg.linux@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org,
        Robert Węcławski <r.weclawski@...il.com>,
        Larry Finger <Larry.Finger@...inger.net>
Subject: Re: [PATCH] staging: r8188eu: replace rtw_malloc() with it's
 definition

On Sat, Sep 14, 2019 at 06:18:03PM +0300, Ivan Safonov wrote:
> On 9/10/19 2:59 PM, Dan Carpenter wrote:
> > On Sun, Sep 08, 2019 at 12:00:26PM +0300, Ivan Safonov wrote >> rtw_malloc prevents the use of kmemdup/kzalloc and others.
> > > 
> > > Signed-off-by: Ivan Safonov <insafonov@...il.com>
> > > ---
> > >   drivers/staging/rtl8188eu/core/rtw_ap.c        |  4 ++--
> > >   drivers/staging/rtl8188eu/core/rtw_mlme_ext.c  |  2 +-
> > >   .../staging/rtl8188eu/include/osdep_service.h  |  3 ---
> > >   drivers/staging/rtl8188eu/os_dep/ioctl_linux.c | 18 +++++++++---------
> > >   drivers/staging/rtl8188eu/os_dep/mlme_linux.c  |  2 +-
> > >   .../staging/rtl8188eu/os_dep/osdep_service.c   |  7 +------
> > >   6 files changed, 14 insertions(+), 22 deletions(-)
> > > 
> > > diff --git a/drivers/staging/rtl8188eu/core/rtw_ap.c b/drivers/staging/rtl8188eu/core/rtw_ap.c
> > > index 51a5b71f8c25..c9c57379b7a2 100644
> > > --- a/drivers/staging/rtl8188eu/core/rtw_ap.c
> > > +++ b/drivers/staging/rtl8188eu/core/rtw_ap.c
> > > @@ -104,7 +104,7 @@ static void update_BCNTIM(struct adapter *padapter)
> > >   	}
> > >   	if (remainder_ielen > 0) {
> > > -		pbackup_remainder_ie = rtw_malloc(remainder_ielen);
> > > +		pbackup_remainder_ie = kmalloc(remainder_ielen, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
> >                                                                  ^^^^^^^^^^^^^
> > This stuff isn't right.  It really should be checking if spinlocks are
> > held or IRQs are disabled.  And the only way to do that is by auditing
> > the callers.
> I hope to make these changes later as separate independent patches.
> This patch do only one thing - remove rtw_malloc().

No, just do that in one step.

regards,
dan carpenter