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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 B7F06C7618F for ; Mon, 15 Jul 2019 14:47:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8750021530 for ; Mon, 15 Jul 2019 14:47:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563202047; bh=Y5+ESfZ0z8Nov1UDBvP2MAC9WsYBTug6SOqGrGTnQfE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xrcrAcdJ2DBWp+mAv2RspKtTe0OfAhCkC6thUgx113UDv2oemzzpGuHT+FxMQwaCd M8UUY/qfZpLiB/sA+GbMgesCP3rwbTl8/7PD6kmM2PeXfvBxnwz/fKQxhF5WV3HTyL 1sUF61Ys55l2+Tw9jR2CfkU9Pw40PzE7FGgNS8+I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404441AbfGOOr0 (ORCPT ); Mon, 15 Jul 2019 10:47:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:41502 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2392084AbfGOOrQ (ORCPT ); Mon, 15 Jul 2019 10:47:16 -0400 Received: from sasha-vm.mshome.net (unknown [73.61.17.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 610C8217D9; Mon, 15 Jul 2019 14:47:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563202036; bh=Y5+ESfZ0z8Nov1UDBvP2MAC9WsYBTug6SOqGrGTnQfE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=z0zjDpbtUS9/86/arZT0trecaEiggi7Ok4/L7AIPCJozrte8Ue2ae4aJow7jGQ4Hz GPwDxGoNgkUuzQITtfhivx4qUb92EklDhDErHbBOeWYeNhd6eFZB4lMirY7OmJkA1n 6/tpg2IogQ8E7ZVyj/4tSpS/A5cbRz37SQS1QloY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Srinivas Kandagatla , Mark Brown , Sasha Levin Subject: [PATCH AUTOSEL 4.4 28/53] regmap: fix bulk writes on paged registers Date: Mon, 15 Jul 2019 10:45:10 -0400 Message-Id: <20190715144535.11636-28-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190715144535.11636-1-sashal@kernel.org> References: <20190715144535.11636-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Srinivas Kandagatla [ Upstream commit db057679de3e9e6a03c1bcd5aee09b0d25fd9f5b ] On buses like SlimBus and SoundWire which does not support gather_writes yet in regmap, A bulk write on paged register would be silently ignored after programming page. This is because local variable 'ret' value in regmap_raw_write_impl() gets reset to 0 once page register is written successfully and the code below checks for 'ret' value to be -ENOTSUPP before linearising the write buffer to send to bus->write(). Fix this by resetting the 'ret' value to -ENOTSUPP in cases where gather_writes() is not supported or single register write is not possible. Signed-off-by: Srinivas Kandagatla Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/base/regmap/regmap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index fd377b956199..77cabde977ed 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1358,6 +1358,8 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg, map->format.reg_bytes + map->format.pad_bytes, val, val_len); + else + ret = -ENOTSUPP; /* If that didn't work fall back on linearising by hand. */ if (ret == -ENOTSUPP) { -- 2.20.1