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 C5F37C433EF for ; Fri, 15 Apr 2022 20:08:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351281AbiDOUKv (ORCPT ); Fri, 15 Apr 2022 16:10:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350712AbiDOUKk (ORCPT ); Fri, 15 Apr 2022 16:10:40 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F8F6AF1C1 for ; Fri, 15 Apr 2022 13:08:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1650053291; x=1681589291; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=7xSO7egGrWcCmgIOamz5CA/RRodR2Btk3P1WgXO2so4=; b=ClrTr8CL7LGCk4JeuyYiScCIdn74pmwc8pvafSjw4TSL0AL87Dov44yA rOA9GnPbXhuMd/tjyQl+AeF5KPM9K37ZWASxDMN74W3Y87Y5pGAiyrXFY +G3YhiHo7HyetnzuZRgFmp253xqRF4TNVtIRWBIgGjDpFANSsr9KVWfDh 66NzmvwcDcAjlPAq3xyY2wwvvHi8Di4IxxG+xkIxzfmgaeSZyCpQNW1un qlgkXmX9WQbMJsO/NKvJ5Xz6ugRo+SrLV3Ak+5p5P24Hz2AQHCxnT+4ci UfxXNGnrq8rMonFd0oYCTLFBf0lX3MlnwYYzIwtDjFwSjuzKB/yiQSJEK A==; X-IronPort-AV: E=McAfee;i="6400,9594,10318"; a="262078946" X-IronPort-AV: E=Sophos;i="5.90,263,1643702400"; d="scan'208";a="262078946" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Apr 2022 13:08:09 -0700 X-IronPort-AV: E=Sophos;i="5.90,263,1643702400"; d="scan'208";a="574510689" Received: from rhweight-mobl.amr.corp.intel.com (HELO rhweight-mobl.ra.intel.com) ([10.209.98.156]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Apr 2022 13:08:09 -0700 From: Russ Weight To: mcgrof@kernel.org, rafael@kernel.org, linux-kernel@vger.kernel.org Cc: trix@redhat.com, lgoncalv@redhat.com, yilun.xu@intel.com, hao.wu@intel.com, matthew.gerlach@intel.com, basheer.ahmed.muddebihal@intel.com, tianfei.zhang@intel.com, Russ Weight Subject: [PATCH v2 2/8] firmware_loader: Check fw_state_is_done in loading_store Date: Fri, 15 Apr 2022 13:07:59 -0700 Message-Id: <20220415200805.610339-3-russell.h.weight@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220415200805.610339-1-russell.h.weight@intel.com> References: <20220415200805.610339-1-russell.h.weight@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Rename fw_sysfs_done() and fw_sysfs_loading() to fw_state_is_done() and fw_state_is_loading() respectively, and place them along side companion functions in drivers/base/firmware_loader/firmware.h. Use the fw_state_is_done() function to exit early from firmware_loading_store() if the state is already "done". This is being done in preparation for supporting persistent sysfs nodes to allow userspace to upload firmware to a device, potentially reusing the sysfs loading and data files multiple times. Signed-off-by: Russ Weight --- v1: - No change from RFC patch v2: - It was discovered that the new function in v1, fw_state_is_done(), is equivalent to the existing fw_sysfs_done() function. Renamed fw_sysfs_done() and fw_sysfs_loading() to fw_state_is_done() and fw_state_is_loading() respectively, and placed them along side companion functions in drivers/base/firmware_loader/firmware.h. - Removed the "if !fw_sysfs_done(fw_priv))" condition in switch case 1 of firmware_loading_store(). It is rendered unnecessary by other changes to the function by this patch. --- drivers/base/firmware_loader/fallback.c | 28 +++++++------------------ drivers/base/firmware_loader/firmware.h | 10 +++++++++ 2 files changed, 18 insertions(+), 20 deletions(-) diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c index 4afb0e9312c0..8063eb595719 100644 --- a/drivers/base/firmware_loader/fallback.c +++ b/drivers/base/firmware_loader/fallback.c @@ -58,16 +58,6 @@ static long firmware_loading_timeout(void) __firmware_loading_timeout() * HZ : MAX_JIFFY_OFFSET; } -static inline bool fw_sysfs_done(struct fw_priv *fw_priv) -{ - return __fw_state_check(fw_priv, FW_STATUS_DONE); -} - -static inline bool fw_sysfs_loading(struct fw_priv *fw_priv) -{ - return __fw_state_check(fw_priv, FW_STATUS_LOADING); -} - static inline int fw_sysfs_wait_timeout(struct fw_priv *fw_priv, long timeout) { return __fw_state_wait_common(fw_priv, timeout); @@ -91,7 +81,7 @@ static void __fw_load_abort(struct fw_priv *fw_priv) * There is a small window in which user can write to 'loading' * between loading done/aborted and disappearance of 'loading' */ - if (fw_state_is_aborted(fw_priv) || fw_sysfs_done(fw_priv)) + if (fw_state_is_aborted(fw_priv) || fw_state_is_done(fw_priv)) return; fw_state_aborted(fw_priv); @@ -220,7 +210,7 @@ static ssize_t firmware_loading_show(struct device *dev, mutex_lock(&fw_lock); if (fw_sysfs->fw_priv) - loading = fw_sysfs_loading(fw_sysfs->fw_priv); + loading = fw_state_is_loading(fw_sysfs->fw_priv); mutex_unlock(&fw_lock); return sysfs_emit(buf, "%d\n", loading); @@ -250,19 +240,17 @@ static ssize_t firmware_loading_store(struct device *dev, mutex_lock(&fw_lock); fw_priv = fw_sysfs->fw_priv; - if (fw_state_is_aborted(fw_priv)) + if (fw_state_is_aborted(fw_priv) || fw_state_is_done(fw_priv)) goto out; switch (loading) { case 1: /* discarding any previous partial load */ - if (!fw_sysfs_done(fw_priv)) { - fw_free_paged_buf(fw_priv); - fw_state_start(fw_priv); - } + fw_free_paged_buf(fw_priv); + fw_state_start(fw_priv); break; case 0: - if (fw_sysfs_loading(fw_priv)) { + if (fw_state_is_loading(fw_priv)) { int rc; /* @@ -350,7 +338,7 @@ static ssize_t firmware_data_read(struct file *filp, struct kobject *kobj, mutex_lock(&fw_lock); fw_priv = fw_sysfs->fw_priv; - if (!fw_priv || fw_sysfs_done(fw_priv)) { + if (!fw_priv || fw_state_is_done(fw_priv)) { ret_count = -ENODEV; goto out; } @@ -410,7 +398,7 @@ static ssize_t firmware_data_write(struct file *filp, struct kobject *kobj, mutex_lock(&fw_lock); fw_priv = fw_sysfs->fw_priv; - if (!fw_priv || fw_sysfs_done(fw_priv)) { + if (!fw_priv || fw_state_is_done(fw_priv)) { retval = -ENODEV; goto out; } diff --git a/drivers/base/firmware_loader/firmware.h b/drivers/base/firmware_loader/firmware.h index 2889f446ad41..d5ff32a1ba2d 100644 --- a/drivers/base/firmware_loader/firmware.h +++ b/drivers/base/firmware_loader/firmware.h @@ -149,6 +149,16 @@ static inline void fw_state_done(struct fw_priv *fw_priv) __fw_state_set(fw_priv, FW_STATUS_DONE); } +static inline bool fw_state_is_done(struct fw_priv *fw_priv) +{ + return __fw_state_check(fw_priv, FW_STATUS_DONE); +} + +static inline bool fw_state_is_loading(struct fw_priv *fw_priv) +{ + return __fw_state_check(fw_priv, FW_STATUS_LOADING); +} + int assign_fw(struct firmware *fw, struct device *device); #ifdef CONFIG_FW_LOADER -- 2.25.1