From patchwork Fri Apr 28 09:59:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oswald Buddenhagen X-Patchwork-Id: 13226192 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 94BF6C77B61 for ; Fri, 28 Apr 2023 10:00:48 +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 B83E9129B; Fri, 28 Apr 2023 11:59:55 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz B83E9129B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1682676045; bh=zqMya/k3bt3PkjhuitumlXzefPBOtaLfHo39mVsed+0=; 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=MQJVgUA4Tte3hAx+DFB3hWlluFxZigGQe+GcBRSj9Gsg8+ZVVuRg+UQteUDRyVMaA d/2qzblAIFsD38vrgelbEZ6kYuN3q6chQMeFvaUG2MdfNF0OD3EBR/zDJb8xwLdznE eluGEyB/XIXwLcdhy93BsVRH1FzuiUbJN2SGLYEU= Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id 0CA30F80137; Fri, 28 Apr 2023 11:59:55 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 1E605F80533; Fri, 28 Apr 2023 11:59:50 +0200 (CEST) Received: from bluemchen.kde.org (bluemchen.kde.org [209.51.188.41]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 1C713F80137 for ; Fri, 28 Apr 2023 11:59:43 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 1C713F80137 Received: from ugly.fritz.box (localhost [127.0.0.1]) by bluemchen.kde.org (Postfix) with ESMTP id DB49A24247; Fri, 28 Apr 2023 05:59:41 -0400 (EDT) Received: by ugly.fritz.box (masqmail 0.3.4, from userid 1000) id 1psKtB-9tF-00; Fri, 28 Apr 2023 11:59:41 +0200 From: Oswald Buddenhagen To: alsa-devel@alsa-project.org Subject: [PATCH 4/6] ALSA: emu10k1: fix locking in snd_emu1010_fpga_link_dst_src_write() Date: Fri, 28 Apr 2023 11:59:39 +0200 Message-Id: <20230428095941.1706278-5-oswald.buddenhagen@gmx.de> X-Mailer: git-send-email 2.40.0.152.g15d061e6df In-Reply-To: <20230428095941.1706278-1-oswald.buddenhagen@gmx.de> References: <20230428095941.1706278-1-oswald.buddenhagen@gmx.de> MIME-Version: 1.0 Message-ID-Hash: RGLENIMBK7UBGWWTHJQMIU2OSF5XYBTB X-Message-ID-Hash: RGLENIMBK7UBGWWTHJQMIU2OSF5XYBTB 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: This is a multi-register operation, which must be locked in its entirety. Signed-off-by: Oswald Buddenhagen --- sound/pci/emu10k1/io.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-) diff --git a/sound/pci/emu10k1/io.c b/sound/pci/emu10k1/io.c index cfb96a67aa35..aee84c3f9f37 100644 --- a/sound/pci/emu10k1/io.c +++ b/sound/pci/emu10k1/io.c @@ -233,23 +233,28 @@ int snd_emu10k1_i2c_write(struct snd_emu10k1 *emu, return err; } -void snd_emu1010_fpga_write(struct snd_emu10k1 *emu, u32 reg, u32 value) +static void snd_emu1010_fpga_write_locked(struct snd_emu10k1 *emu, u32 reg, u32 value) { - unsigned long flags; - if (snd_BUG_ON(reg > 0x3f)) return; reg += 0x40; /* 0x40 upwards are registers. */ if (snd_BUG_ON(value > 0x3f)) /* 0 to 0x3f are values */ return; - spin_lock_irqsave(&emu->emu_lock, flags); outw(reg, emu->port + A_GPIO); udelay(10); outw(reg | 0x80, emu->port + A_GPIO); /* High bit clocks the value into the fpga. */ udelay(10); outw(value, emu->port + A_GPIO); udelay(10); outw(value | 0x80 , emu->port + A_GPIO); /* High bit clocks the value into the fpga. */ +} + +void snd_emu1010_fpga_write(struct snd_emu10k1 *emu, u32 reg, u32 value) +{ + unsigned long flags; + + spin_lock_irqsave(&emu->emu_lock, flags); + snd_emu1010_fpga_write_locked(emu, reg, value); spin_unlock_irqrestore(&emu->emu_lock, flags); } @@ -276,14 +281,18 @@ void snd_emu1010_fpga_read(struct snd_emu10k1 *emu, u32 reg, u32 *value) */ void snd_emu1010_fpga_link_dst_src_write(struct snd_emu10k1 *emu, u32 dst, u32 src) { + unsigned long flags; + if (snd_BUG_ON(dst & ~0x71f)) return; if (snd_BUG_ON(src & ~0x71f)) return; - snd_emu1010_fpga_write(emu, EMU_HANA_DESTHI, dst >> 8); - snd_emu1010_fpga_write(emu, EMU_HANA_DESTLO, dst & 0x1f); - snd_emu1010_fpga_write(emu, EMU_HANA_SRCHI, src >> 8); - snd_emu1010_fpga_write(emu, EMU_HANA_SRCLO, src & 0x1f); + spin_lock_irqsave(&emu->emu_lock, flags); + snd_emu1010_fpga_write_locked(emu, EMU_HANA_DESTHI, dst >> 8); + snd_emu1010_fpga_write_locked(emu, EMU_HANA_DESTLO, dst & 0x1f); + snd_emu1010_fpga_write_locked(emu, EMU_HANA_SRCHI, src >> 8); + snd_emu1010_fpga_write_locked(emu, EMU_HANA_SRCLO, src & 0x1f); + spin_unlock_irqrestore(&emu->emu_lock, flags); } void snd_emu10k1_intr_enable(struct snd_emu10k1 *emu, unsigned int intrenb)