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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 E28B8C282C8 for ; Mon, 28 Jan 2019 17:16:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A5D362082E for ; Mon, 28 Jan 2019 17:16:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548695770; bh=1lo/rXqcyk+Uvm7ySNkdnHLfIbMaG7qc5NVc1MfvC7k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qMG8P2wM0EgLWrTXleYeN8wd3vrRB+3AJaPTmc/YTi1KbqRJ0QfjIjwyBmG/XdpAg xGdZjdtMomLyFB0blqJ69QbxF5BuQZyEe06kHW34Rwev5mWgsVwYBvDcuU0VA5sC/n CShsDbwbbyAmmzX7t6Egooo2kn5A/sM2cjnHc1sQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732004AbfA1RQJ (ORCPT ); Mon, 28 Jan 2019 12:16:09 -0500 Received: from mail.kernel.org ([198.145.29.99]:55834 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731313AbfA1QGi (ORCPT ); Mon, 28 Jan 2019 11:06:38 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (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 2E21B20989; Mon, 28 Jan 2019 16:06:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548691597; bh=1lo/rXqcyk+Uvm7ySNkdnHLfIbMaG7qc5NVc1MfvC7k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T/etb+tY+Tc+HgoBC2WK4a2ZLjrYlEVxK+XQx7uYDWlfW33m9A3kGvhq0Hk4hg/G8 npA3lcb8zLfD2TgJx6g8fsJURDd5RP27DkvAul8ZTeWeizpj3Hhxvt+CRC6m3Eombg yFwJx62iitG8qUO2UrTFxJIo4A3AMBEJaufdwRfA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kai-Heng Feng , Ulf Hansson , Sasha Levin Subject: [PATCH AUTOSEL 4.19 154/258] memstick: Prevent memstick host from getting runtime suspended during card detection Date: Mon, 28 Jan 2019 10:57:40 -0500 Message-Id: <20190128155924.51521-154-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190128155924.51521-1-sashal@kernel.org> References: <20190128155924.51521-1-sashal@kernel.org> MIME-Version: 1.0 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: Kai-Heng Feng [ Upstream commit e03e303edf1c63e6dd455ccd568c74e93ef3ba8c ] We can use MEMSTICK_POWER_{ON,OFF} along with pm_runtime_{get,put} helpers to let memstick host support runtime pm. The rpm count may go down to zero before the memstick host powers on, so the host can be runtime suspended. So before doing card detection, increment the rpm count to avoid the host gets runtime suspended. Balance the rpm count after card detection is done. Signed-off-by: Kai-Heng Feng Tested-by: Oleksandr Natalenko Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin --- drivers/memstick/core/memstick.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c index 76382c858c35..1246d69ba187 100644 --- a/drivers/memstick/core/memstick.c +++ b/drivers/memstick/core/memstick.c @@ -18,6 +18,7 @@ #include #include #include +#include #define DRIVER_NAME "memstick" @@ -436,6 +437,7 @@ static void memstick_check(struct work_struct *work) struct memstick_dev *card; dev_dbg(&host->dev, "memstick_check started\n"); + pm_runtime_get_noresume(host->dev.parent); mutex_lock(&host->lock); if (!host->card) { if (memstick_power_on(host)) @@ -479,6 +481,7 @@ static void memstick_check(struct work_struct *work) host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF); mutex_unlock(&host->lock); + pm_runtime_put(host->dev.parent); dev_dbg(&host->dev, "memstick_check finished\n"); } -- 2.19.1