From patchwork Tue Aug 15 19:01:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Iwai X-Patchwork-Id: 13354170 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 E42F4C001E0 for ; Tue, 15 Aug 2023 19:07:11 +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 2EF0FDF8; Tue, 15 Aug 2023 21:06:20 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 2EF0FDF8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1692126430; bh=2gGfS+UwqHR4Z8wJYw4C8YDQzFVwDLlW3ebkb41yEQ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Archive:List-Help:List-Owner:List-Post:List-Subscribe: List-Unsubscribe:From; b=VvrMnMr7x35oT6plc85dSWDFMss3pAbsYWE1tjT56GspPab/Bk3wbqYWHChkrVABs Z8dAYDndfLmWUlsynecoGLlN93jO5aLDiozpoSYJytELnaH0jjoxcAZT9DzeGXGmxh ArO0K11/w7iECxnHmsp4FVoHQFxqNqcqAuKYbAC0= Received: by alsa1.perex.cz (Postfix, from userid 50401) id DEF79F80621; Tue, 15 Aug 2023 21:02:53 +0200 (CEST) Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id D9027F80620; Tue, 15 Aug 2023 21:02:52 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id EF0C9F80602; Tue, 15 Aug 2023 21:02:44 +0200 (CEST) Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id DDA80F80568 for ; Tue, 15 Aug 2023 21:01:53 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz DDA80F80568 Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key, unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa header.b=Srfm4UIY; dkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=i0q7ZsVZ Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 380D51FD6E; Tue, 15 Aug 2023 19:01:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1692126110; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=D6ETb9fq7HCS4tFLoqPg7xnmdjK64qt8f71hdCKXa8k=; b=Srfm4UIYpzYCy+pYQArW4SxQonZ5+jWY7nv/E7sBGpPswXQHq7983vZb9/d1dGCW7SO2Xf nniw5P4lwgYZZ2DXM9TI0nkgulDgihioKeeIV8dhrXmm9tVXrpnsHVsUH8nMbD4Y6YlSGr 4L4rjJw2xd8/m86Y4d35oC3CFciiTbk= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1692126110; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=D6ETb9fq7HCS4tFLoqPg7xnmdjK64qt8f71hdCKXa8k=; b=i0q7ZsVZIbbzD8jgYdc2BErt+pTjvH+NSFNlrHYEq9UewDlu0/IcP4xjSNq5UPOj4I6RDo qiogmyqMORJFJoBw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 1544D1353E; Tue, 15 Aug 2023 19:01:50 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id WMhdBJ7L22QTVAAAMHmgww (envelope-from ); Tue, 15 Aug 2023 19:01:50 +0000 From: Takashi Iwai To: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org, Takashi Iwai , Mark Brown Subject: [PATCH v2 19/25] ASoC: mediatek: Convert to generic PCM copy ops Date: Tue, 15 Aug 2023 21:01:30 +0200 Message-Id: <20230815190136.8987-20-tiwai@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230815190136.8987-1-tiwai@suse.de> References: <20230815190136.8987-1-tiwai@suse.de> MIME-Version: 1.0 Message-ID-Hash: VQQTSBSSGMROQHUG2R5SWSJDE3WOVBLW X-Message-ID-Hash: VQQTSBSSGMROQHUG2R5SWSJDE3WOVBLW X-MailFrom: tiwai@suse.de 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 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: This patch converts the mediatek BT SCO driver code to use the new unified PCM copy callback. It's a straightforward conversion from *_user() to *_iter() variants. As copy_form/to_iter() updates the internal offset at each read/write, we can drop the cur_*_idx counter in the loop, too. Note that copy_from/to_iter() returns the copied bytes, hence the error condition is adjusted accordingly. Reviewed-by: Mark Brown Signed-off-by: Takashi Iwai --- sound/soc/mediatek/common/mtk-btcvsd.c | 27 ++++++++++---------------- 1 file changed, 10 insertions(+), 17 deletions(-) diff --git a/sound/soc/mediatek/common/mtk-btcvsd.c b/sound/soc/mediatek/common/mtk-btcvsd.c index 1ba0633e542f..c12d170fa1de 100644 --- a/sound/soc/mediatek/common/mtk-btcvsd.c +++ b/sound/soc/mediatek/common/mtk-btcvsd.c @@ -696,11 +696,10 @@ static int wait_for_bt_irq(struct mtk_btcvsd_snd *bt, } static ssize_t mtk_btcvsd_snd_read(struct mtk_btcvsd_snd *bt, - char __user *buf, + struct iov_iter *buf, size_t count) { ssize_t read_size = 0, read_count = 0, cur_read_idx, cont; - unsigned int cur_buf_ofs = 0; unsigned long avail; unsigned long flags; unsigned int packet_size = bt->rx->packet_size; @@ -743,10 +742,9 @@ static ssize_t mtk_btcvsd_snd_read(struct mtk_btcvsd_snd *bt, if (read_size > cont) read_size = cont; - if (copy_to_user(buf + cur_buf_ofs, - bt->rx_packet_buf + cur_read_idx, - read_size)) { - dev_warn(bt->dev, "%s(), copy_to_user fail\n", + if (copy_to_iter(bt->rx_packet_buf + cur_read_idx, + read_size, buf) != read_size) { + dev_warn(bt->dev, "%s(), copy_to_iter fail\n", __func__); return -EFAULT; } @@ -756,7 +754,6 @@ static ssize_t mtk_btcvsd_snd_read(struct mtk_btcvsd_snd *bt, spin_unlock_irqrestore(&bt->rx_lock, flags); read_count += read_size; - cur_buf_ofs += read_size; count -= read_size; } @@ -777,11 +774,10 @@ static ssize_t mtk_btcvsd_snd_read(struct mtk_btcvsd_snd *bt, } static ssize_t mtk_btcvsd_snd_write(struct mtk_btcvsd_snd *bt, - char __user *buf, + struct iov_iter *buf, size_t count) { int written_size = count, avail, cur_write_idx, write_size, cont; - unsigned int cur_buf_ofs = 0; unsigned long flags; unsigned int packet_size = bt->tx->packet_size; @@ -835,11 +831,9 @@ static ssize_t mtk_btcvsd_snd_write(struct mtk_btcvsd_snd *bt, if (write_size > cont) write_size = cont; - if (copy_from_user(bt->tx_packet_buf + - cur_write_idx, - buf + cur_buf_ofs, - write_size)) { - dev_warn(bt->dev, "%s(), copy_from_user fail\n", + if (copy_from_iter(bt->tx_packet_buf + cur_write_idx, + write_size, buf) != write_size) { + dev_warn(bt->dev, "%s(), copy_from_iter fail\n", __func__); return -EFAULT; } @@ -847,7 +841,6 @@ static ssize_t mtk_btcvsd_snd_write(struct mtk_btcvsd_snd *bt, spin_lock_irqsave(&bt->tx_lock, flags); bt->tx->packet_w += write_size / packet_size; spin_unlock_irqrestore(&bt->tx_lock, flags); - cur_buf_ofs += write_size; count -= write_size; } @@ -1033,7 +1026,7 @@ static snd_pcm_uframes_t mtk_pcm_btcvsd_pointer( static int mtk_pcm_btcvsd_copy(struct snd_soc_component *component, struct snd_pcm_substream *substream, int channel, unsigned long pos, - void __user *buf, unsigned long count) + struct iov_iter *buf, unsigned long count) { struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component); @@ -1274,7 +1267,7 @@ static const struct snd_soc_component_driver mtk_btcvsd_snd_platform = { .prepare = mtk_pcm_btcvsd_prepare, .trigger = mtk_pcm_btcvsd_trigger, .pointer = mtk_pcm_btcvsd_pointer, - .copy_user = mtk_pcm_btcvsd_copy, + .copy = mtk_pcm_btcvsd_copy, }; static int mtk_btcvsd_snd_probe(struct platform_device *pdev)