From patchwork Wed Dec 9 17:35:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tudor Ambarus X-Patchwork-Id: 11961983 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 403B9C433FE for ; Wed, 9 Dec 2020 17:36:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0294D23D20 for ; Wed, 9 Dec 2020 17:36:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730407AbgLIRgk (ORCPT ); Wed, 9 Dec 2020 12:36:40 -0500 Received: from esa.microchip.iphmx.com ([68.232.154.123]:45155 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732068AbgLIRgk (ORCPT ); Wed, 9 Dec 2020 12:36:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1607535400; x=1639071400; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=UEPzXZfvg0KRtVh8AOZLVzo/9yBPGv4fZLRNHDWR5Og=; b=x/6wkeQfvv3bBB0Kkk0Sj4HKjV2WxVMw/nuGkcHVMhJ/c9oCWbsF1ZNM /YtvpGE2SRMAzOB+31AyVcC6rpJppRt5jeapHvrnk+hy8Q4DV/WE30C43 C9VgqqdKLIKUxbO+Pm+szZ2RyYEdTIM5IJ/73KBcpSwDgfSWNL88gQI2s BhHzwqeXoFf4eYiM72jgI1ca9d0BfXUNKsewKj2AuEuPM4MK+p4MhVzLk IOP8kb2imU5IzISTSb+/I6BmzVlwk1kxeB8/T74lVY8T0E3VoWbeUjLvq 4Q4EDhz1Z/XNTiwsu8z20FFgWYtVylfNr0KHwj5RoF3bQMcnNnXb5XTXZ A==; IronPort-SDR: pQYxnXH4juROvY7XLaPE9BX5iAY0Ym5tvs3eKVmdB4a3qBJ8ocuPfntfthYUW88SHHqFmSkjjx jtEhVpTka65La4+q0Sp1DZbLSGfTB+suN0TIS8d5RA5HvN+KunuM2EyYf/0co9CUe1X5yu8Bow nj8CiUA8fGx0NBLZEuwYM+jJ5lZMtbzneeRh8tvVISyRLOXIxU3Md0P4cifX2lt2vqZl/nFJ5A 9Oaw3U08Rtzs2cGDWOxF5ifyKlJTgoA6osc/PdmmsoqG07vZRFATAgdS8ROqeGzsRTV6TG/QxN sgs= X-IronPort-AV: E=Sophos;i="5.78,405,1599548400"; d="scan'208";a="36817605" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 09 Dec 2020 10:35:19 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Wed, 9 Dec 2020 10:35:19 -0700 Received: from atudor-ThinkPad-T470p.amer.actel.com (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Wed, 9 Dec 2020 10:35:17 -0700 From: Tudor Ambarus To: , CC: , Tudor Ambarus Subject: [PATCH] spi: Limit the spi device max speed to controller's max speed Date: Wed, 9 Dec 2020 19:35:14 +0200 Message-ID: <20201209173514.93328-1-tudor.ambarus@microchip.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Make sure the max_speed_hz of spi_device does not override the max_speed_hz of controller. Signed-off-by: Tudor Ambarus --- drivers/spi/spi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index cd3c395b4e90..51d7c004fbab 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -3378,7 +3378,8 @@ int spi_setup(struct spi_device *spi) if (status) return status; - if (!spi->max_speed_hz) + if (!spi->max_speed_hz || + spi->max_speed_hz > spi->controller->max_speed_hz) spi->max_speed_hz = spi->controller->max_speed_hz; mutex_lock(&spi->controller->io_mutex);