From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3B106C04A6A for ; Tue, 25 Jul 2023 11:10:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234037AbjGYLKT (ORCPT ); Tue, 25 Jul 2023 07:10:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44716 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234038AbjGYLJz (ORCPT ); Tue, 25 Jul 2023 07:09:55 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7EA0C448B for ; Tue, 25 Jul 2023 04:08:51 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0846361689 for ; Tue, 25 Jul 2023 11:08:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 19B61C433C7; Tue, 25 Jul 2023 11:08:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1690283330; bh=ObqO7+00nlkMK6KGGi4EGZ9qP/vawE+7zD57CJhjyFU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oCEbV7dYmrxieregvfSJ8VJKhZe9ATFnEKLPa4vOCYsyc14rz60KlCk+2Fe+fntaE U+TXZAxgQ4N9e/sU0sPyHaUneHhy3feMm/n79miXznxgHV6igmKqaGxsk2/DiKfwif s0FvWOmLf/L1xAd8r6XqrTXQuADJIFU2oLOLKVxo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jonas Gorski , Mark Brown , Sasha Levin Subject: [PATCH 5.15 38/78] spi: bcm63xx: fix max prepend length Date: Tue, 25 Jul 2023 12:46:29 +0200 Message-ID: <20230725104452.782368253@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230725104451.275227789@linuxfoundation.org> References: <20230725104451.275227789@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jonas Gorski [ Upstream commit 5158814cbb37bbb38344b3ecddc24ba2ed0365f2 ] The command word is defined as following: /* Command */ #define SPI_CMD_COMMAND_SHIFT 0 #define SPI_CMD_DEVICE_ID_SHIFT 4 #define SPI_CMD_PREPEND_BYTE_CNT_SHIFT 8 #define SPI_CMD_ONE_BYTE_SHIFT 11 #define SPI_CMD_ONE_WIRE_SHIFT 12 If the prepend byte count field starts at bit 8, and the next defined bit is SPI_CMD_ONE_BYTE at bit 11, it can be at most 3 bits wide, and thus the max value is 7, not 15. Fixes: b17de076062a ("spi/bcm63xx: work around inability to keep CS up") Signed-off-by: Jonas Gorski Link: https://lore.kernel.org/r/20230629071453.62024-1-jonas.gorski@gmail.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-bcm63xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c index 80fa0ef8909ca..147199002df1e 100644 --- a/drivers/spi/spi-bcm63xx.c +++ b/drivers/spi/spi-bcm63xx.c @@ -126,7 +126,7 @@ enum bcm63xx_regs_spi { SPI_MSG_DATA_SIZE, }; -#define BCM63XX_SPI_MAX_PREPEND 15 +#define BCM63XX_SPI_MAX_PREPEND 7 #define BCM63XX_SPI_MAX_CS 8 #define BCM63XX_SPI_BUS_NUM 0 -- 2.39.2