linux-kernel - Re: idio{,ma}tic typos (was Re: + fix-vm_can_nonlinear-check-in-sys_remap_file

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Date:	Thu, 11 Oct 2007 06:57:42 -0700 (PDT)
From:	Alex Dubov <oakad@...oo.com>
To:	Pierre Ossman <drzeus@...eus.cx>, Alexey Dobriyan <adobriyan@...ru>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: idio{,ma}tic typos (was Re: + fix-vm_can_nonlinear-check-in-sys_remap_file_pages.patch added to -mm tree)


--- Pierre Ossman <drzeus@...eus.cx> wrote:

> On Wed, 10 Oct 2007 14:45:40 +0400
> Alexey Dobriyan <adobriyan@...ru> wrote:
> 
> > ["if (!x & y)" patch from yanzheng@]
> > ["if (!x & y)" patch from adobriyan@]
> > ["if (!x & y)" patches from viro@]
> > 
> > While we're at it, below is somewhat ugly sparse patch for detecting
> > "&& 0x" typos.
> > 
> 
> The maintainer for tifm is Alex Dubov, so cc:ing him.
> 
> > drivers/mmc/host/tifm_sd.c:183:9: warning: dubious && 0x
> > 
> > 	if ((r_data->flags & MMC_DATA_WRITE)
> >             && DATA_CARRY)
> > 		writel(host->bounce_buf_data[0],
> > 		host->dev->addr
> > 		+ SOCK_MMCSD_DATA);
> > 
> > 	given that DATA_CARRY is always used together with
> > ->cmd_flags, this place is asking for obvious fixlet:
> > 
> > 
> > [PATCH] tifm_sd.c: fix DATA_CARRY check
> > 
> > Signed-off-by: Alexey Dobriyan <adobriyan@...ru>
> > ---
> > 
> >  drivers/mmc/host/tifm_sd.c |    2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > --- a/drivers/mmc/host/tifm_sd.c
> > +++ b/drivers/mmc/host/tifm_sd.c
> > @@ -180,7 +180,7 @@ static void tifm_sd_transfer_data(struct tifm_sd
> > *host) host->sg_pos++;
> >  			if (host->sg_pos == host->sg_len) {
> >  				if ((r_data->flags & MMC_DATA_WRITE)
> > -				    && DATA_CARRY)
> > +				    && (host->cmd_flags &
> > DATA_CARRY)) writel(host->bounce_buf_data[0],
> >  					       host->dev->addr
> >  					       + SOCK_MMCSD_DATA);
> > 
> > 
> > 
> 
> Rgds
> Pierre
> 

Oops. I wonder why this was never triggered (some users are having problems with dma, so they use
PIO rather extensively). The patch is probably correct, but I can't do any testing because I'm
currently on vacation.



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