From patchwork Thu Jun 13 14:06:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Alexis_Lothor=C3=A9?= X-Patchwork-Id: 804790 Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [217.70.183.201]) (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 4DBB11448D7; Thu, 13 Jun 2024 14:10:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718287821; cv=none; b=CZ+6ypLyxU7aAONwd9KM+LQcLTNRe8mSQ1gDJhxhWxdeIPGMr5nchK7rnaVan1Sy9bMH5JvH4mGrx8vqcKRTvdMw2zszbp8Gt069x7NWyX+aYozmQ6+SsZFwvjNfQl8cCdQUC0gZgGnSan/GWcVYdUJ/h7c4o8a4fgVdIxK9K4k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718287821; c=relaxed/simple; bh=EunqTQzqUJ/F3JjE+G+C/6XlPd3N6vJCY/SP3DH8r0I=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=WDhZRB3j4Be4X1Lr2v/0DBodIAUjhO4OL6DhI0gBim001MbUjfYQc+nokvJaRHRARu5yjq83kunjfWvGxTZvh1vtwDBVNkLWGk8jmHvNT6G/51n2tNjlopBb0AruI9wgyGVmxHVNjLKfoixAqHbnK+wICYc/72+vurS4us+UNOU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=baV8suq5; arc=none smtp.client-ip=217.70.183.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="baV8suq5" Received: by mail.gandi.net (Postfix) with ESMTPSA id 432301BF213; Thu, 13 Jun 2024 14:10:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1718287812; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=C+8CGh8peOxYqhyLXUs4A1Iy7daW4jSk3Jb9aFviGrI=; b=baV8suq5UfSJ8byMycRDYXiJEWCNgKschAdtStX9cmHOyVQ7go0km0aomrOqboJ9bO7Ctu X6Tb2HeB1RGCXsr5Kmo4rQvK3gH05XY8kXJ7sI/yLrLk2qPamtMJfWSQdQ85lrAH4ybNZ+ Z+516AUehwZjqcNTpA8GR0Nmr6h4RTn6UbvJL1fed1hFYfN9gdBXIEIKnKCXokqpIhEOk3 1c5UCwm5cNZAo6gzj36xwDUuCYzjYMITs6msoHSOYLFLMtAptAD6tWEYDrPYQhYYo84Ux2 JhlvRM8OArrxFTvcpPzFrpRA756AqGxbeyyyGlLPjdFh6i9W1v3097K0yTxm3Q== From: =?utf-8?q?Alexis_Lothor=C3=A9?= Date: Thu, 13 Jun 2024 16:06:41 +0200 Subject: [PATCH 2/6] wifi: wilc1000: let host->chip suspend/resume notifications manage chip wake/sleep Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240613-wilc_suspend-v1-2-c2f766d0988c@bootlin.com> References: <20240613-wilc_suspend-v1-0-c2f766d0988c@bootlin.com> In-Reply-To: <20240613-wilc_suspend-v1-0-c2f766d0988c@bootlin.com> To: linux-wireless@vger.kernel.org Cc: Ajay Singh , Claudiu Beznea , Kalle Valo , Thomas Petazzoni , linux-kernel@vger.kernel.org, =?utf-8?q?Alexis_Lothor=C3=A9?= X-Mailer: b4 0.13.0 X-GND-Sasl: alexis.lothore@bootlin.com host_wakeup_notify and host_sleep_notify are surrounded by chip_wakeup and chip_allow_sleep calls, which theorically need to be protected with the hif_cs lock. This lock protection is currently missing. Instead of adding the lock where those two functions are called, move those in host->chip suspend notifications to benefit from the lock already used there (in bus_acquire/bus_release) Signed-off-by: Alexis Lothoré --- drivers/net/wireless/microchip/wilc1000/sdio.c | 5 ----- drivers/net/wireless/microchip/wilc1000/wlan.c | 8 ++++---- 2 files changed, 4 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c index 6461a3ec0120..4e478a2cd4cc 100644 --- a/drivers/net/wireless/microchip/wilc1000/sdio.c +++ b/drivers/net/wireless/microchip/wilc1000/sdio.c @@ -256,14 +256,12 @@ static int wilc_sdio_suspend(struct device *dev) int ret; dev_info(dev, "sdio suspend\n"); - chip_wakeup(wilc); if (!IS_ERR(wilc->rtc_clk)) clk_disable_unprepare(wilc->rtc_clk); if (wilc->suspend_event) { host_sleep_notify(wilc); - chip_allow_sleep(wilc); } ret = wilc_sdio_reset(wilc); @@ -1003,14 +1001,11 @@ static int wilc_sdio_resume(struct device *dev) dev_info(dev, "sdio resume\n"); sdio_release_host(func); - chip_wakeup(wilc); wilc_sdio_init(wilc, true); if (wilc->suspend_event) host_wakeup_notify(wilc); - chip_allow_sleep(wilc); - return 0; } diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/wireless/microchip/wilc1000/wlan.c index 41a5c0ed7480..533939e71534 100644 --- a/drivers/net/wireless/microchip/wilc1000/wlan.c +++ b/drivers/net/wireless/microchip/wilc1000/wlan.c @@ -678,17 +678,17 @@ EXPORT_SYMBOL_GPL(chip_wakeup); void host_wakeup_notify(struct wilc *wilc) { - acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY); + acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_2, 1); - release_bus(wilc, WILC_BUS_RELEASE_ONLY); + release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); } EXPORT_SYMBOL_GPL(host_wakeup_notify); void host_sleep_notify(struct wilc *wilc) { - acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY); + acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_1, 1); - release_bus(wilc, WILC_BUS_RELEASE_ONLY); + release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); } EXPORT_SYMBOL_GPL(host_sleep_notify);