From patchwork Fri Oct 18 05:53:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 836937 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 59ECD186E38; Fri, 18 Oct 2024 05:53:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729230807; cv=none; b=d7pDcVLcVy3FQzq6MK8MRVdaJekiS9Tmi61awF6ON/uILyErdOHQpinqin3yfOhbG+oXDprfuaA298dgc6nQ2yIyB7Qe3aGM8CLd/avUX3UfEBkbO6tjE+hs4S3JcxSc/w1VNlw1bShxVyiKbvbyAWYL14jxdZwWV9yGSfO3GrA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729230807; c=relaxed/simple; bh=uzjAOucrKtfD0CkwggkoeV+VI4yHBkB0yUqlDwNCYzE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=f4BW8tKsw5u9SOnJbm4lk0jP7bbTkYDo9UC8cBfCNsekbdz+Jv50v3209ib9nTo1CZcrImtEy00ReU4FqxrEEsjGYR2iX4e5yygQliWligATFNszTikWUToAYr6PogqBlsevh+kG3HVegtqtgTfKiDkXU1/+6ow1NIzu1HMpvD4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=W+Jbzur8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="W+Jbzur8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C3281C4CED5; Fri, 18 Oct 2024 05:53:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729230806; bh=uzjAOucrKtfD0CkwggkoeV+VI4yHBkB0yUqlDwNCYzE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W+Jbzur8gQa3WeSILcq5SqXpKOdpGjQdG3f7ki9BoTgKxUHokuM+vVVi7e0NP/HRI Woumuqvy8nG8scgdsABMF25uDA87eek/M4igOCdBfIt1VT01lI3XKVW7H+A50NEbNo Nxr8HFryDEMTqJ9VdKSfVQFcxsYyrYiq2k6uh8E0Bqy7l+Udfkowcq2aAYcOLJ3Oiu 6tAU17lqBYQQV292tcurxgOGRSHhvHSZ78cs41Lq/VHu6YmTBUwlz8PuwmNlwdf/ot zNoqTkEZlzSErlZgTeNp/xwjcwV8rFL0wuTU2cOOeYIDH1wwDhP4QPvAFD8fNC1e3Q NFXAeOJtkf+tA== Received: from mchehab by mail.kernel.org with local (Exim 4.98) (envelope-from ) id 1t1fvQ-00000005Me9-1a5W; Fri, 18 Oct 2024 07:53:24 +0200 From: Mauro Carvalho Chehab To: Cc: Mauro Carvalho Chehab , Hans Verkuil , Kevin Hao , Mauro Carvalho Chehab , Philipp Stanner , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [PATCH v2 04/13] media: dvb_frontend: don't play tricks with underflow values Date: Fri, 18 Oct 2024 07:53:06 +0200 Message-ID: <8d6193ed8d53ce94d595cb431627bbc7783c0e4c.1729230718.git.mchehab+huawei@kernel.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: Mauro Carvalho Chehab fepriv->auto_sub_step is unsigned. Setting it to -1 is just a trick to avoid calling continue, as reported by Coverity. It relies to have this code just afterwards: if (!ready) fepriv->auto_sub_step++; Simplify the code by simply setting it to zero and use continue to return to the while loop. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Mauro Carvalho Chehab Reviewed-by: Philipp Stanner --- drivers/media/dvb-core/dvb_frontend.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c index d48f48fda87c..c9283100332a 100644 --- a/drivers/media/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb-core/dvb_frontend.c @@ -443,8 +443,8 @@ static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wra default: fepriv->auto_step++; - fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ - break; + fepriv->auto_sub_step = 0; + continue; } if (!ready) fepriv->auto_sub_step++;