From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mauro Carvalho Chehab Date: Tue, 11 Oct 2011 20:59:25 +0000 Subject: Re: [patch] Staging: cx25821: off by on in cx25821_vidioc_s_input() Message-Id: <4E94AE2D.4050408@redhat.com> List-Id: References: <20111007132643.GB31424@elgon.mountain> In-Reply-To: <20111007132643.GB31424@elgon.mountain> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Dan Carpenter Cc: Greg Kroah-Hartman , "Leonid V. Fedorenchik" , Hans Verkuil , devel@driverdev.osuosl.org, linux-media@vger.kernel.org, kernel-janitors@vger.kernel.org Hi Dan, Em 07-10-2011 10:26, Dan Carpenter escreveu: > If "i" is 2 then when we call cx25821_video_mux() we'd end up going > past the end of the cx25821_boards[dev->board]->input[]. > > The INPUT() macro obfuscates what's going on in that function so it's > a bit hard to follow. > > Signed-off-by: Dan Carpenter > --- > I don't have this hardware, so I can't actually test this. Please > review this carefully. > > diff --git a/drivers/staging/cx25821/cx25821-video.c b/drivers/staging/cx25821/cx25821-video.c > index 084fc08..acd7c4b 100644 > --- a/drivers/staging/cx25821/cx25821-video.c > +++ b/drivers/staging/cx25821/cx25821-video.c > @@ -1312,7 +1312,7 @@ int cx25821_vidioc_s_input(struct file *file, void *priv, unsigned int i) > return err; > } > > - if (i > 2) { > + if (i >= 2) { It would be better to add a NUM_INPUT macro (or something like that, defined together with the INPUT macro) that would do an ARRAY_SIZE(cx25821_boards) and use it here, instead of a "2" magic number. Thanks, Mauro > dprintk(1, "%s(): -EINVAL\n", __func__); > return -EINVAL; > } > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html