From patchwork Fri May 5 15:52:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oswald Buddenhagen X-Patchwork-Id: 679363 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F2781C77B75 for ; Fri, 5 May 2023 15:55:22 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id EFADD2D4D; Fri, 5 May 2023 17:54:30 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz EFADD2D4D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1683302121; bh=k7n7eqlG/TRgKNkzu/hg5+IuiMF7Q2VmP7rofJw5Y8I=; h=From:To:Subject:Date:In-Reply-To:References:CC:List-Id: List-Archive:List-Help:List-Owner:List-Post:List-Subscribe: List-Unsubscribe:From; b=mQ2S1Ryv29o4eoDZhRDMGLdC/SeZ+OvBZGG7k6GG10TlFBlbMINv1YjiFUNr1SavM HuRQ7rOtiMrBYT6m9+gxadkviNtsvBSv5W7H0+6igRvyKXxfWstzbb5vIQz00Xc8tM OANhoXoNlAjN1/LyZ3SaJ/i+OxzYQAyW/Wjnn10A= Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id 97137F8057C; Fri, 5 May 2023 17:53:07 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 2712CF80557; Fri, 5 May 2023 17:52:59 +0200 (CEST) Received: from bluemchen.kde.org (bluemchen.kde.org [IPv6:2001:470:142:8::100]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id E9051F80548 for ; Fri, 5 May 2023 17:52:48 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz E9051F80548 Received: from ugly.fritz.box (localhost [127.0.0.1]) by bluemchen.kde.org (Postfix) with ESMTP id 5A4F924173; Fri, 5 May 2023 11:52:45 -0400 (EDT) Received: by ugly.fritz.box (masqmail 0.3.4, from userid 1000) id 1puxjh-hWM-00; Fri, 05 May 2023 17:52:45 +0200 From: Oswald Buddenhagen To: alsa-devel@alsa-project.org Subject: [PATCH v2 7/7] ALSA: pcm: use exit controlled loop in snd_pcm_playback_silence() Date: Fri, 5 May 2023 17:52:44 +0200 Message-Id: <20230505155244.2312199-7-oswald.buddenhagen@gmx.de> X-Mailer: git-send-email 2.40.0.152.g15d061e6df In-Reply-To: <20230505155244.2312199-1-oswald.buddenhagen@gmx.de> References: <20230505155244.2312199-1-oswald.buddenhagen@gmx.de> MIME-Version: 1.0 Message-ID-Hash: 6PHRD4XTIGXADYJVEDBW7CZR53QZKNYK X-Message-ID-Hash: 6PHRD4XTIGXADYJVEDBW7CZR53QZKNYK X-MailFrom: ossi@kde.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Takashi Iwai X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: We already know that `frames` is greater than zero, because we just checked it. So we don't need to check the loop condition on the first iteration. Signed-off-by: Oswald Buddenhagen --- sound/core/pcm_lib.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 17fc80a654be..9c121a921b04 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -123,14 +123,14 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram if (frames == 0) return; ofs = (runtime->silence_start + runtime->silence_filled) % runtime->buffer_size; - while (frames > 0) { + do { transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; err = fill_silence_frames(substream, ofs, transfer); snd_BUG_ON(err < 0); runtime->silence_filled += transfer; frames -= transfer; ofs = 0; - } + } while (frames > 0); snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); }