From patchwork Mon Jan 24 18:00:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 534829 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 1FD8AC433EF for ; Mon, 24 Jan 2022 18:01:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244876AbiAXSBJ (ORCPT ); Mon, 24 Jan 2022 13:01:09 -0500 Received: from mga05.intel.com ([192.55.52.43]:37768 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241614AbiAXSAl (ORCPT ); Mon, 24 Jan 2022 13:00:41 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643047241; x=1674583241; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8JozRceOoyg4LNdwXwVz+BMwrK4+CMCruE+xcyfxVZ8=; b=hYgZSqqT+OYILj1ns+wM7PvGVBnYpfRoSQ1C8Wr+LWOCTDSmTfpZYa7y qhEUuMXHvS7l3psBXaicU4VslFPxvy6UpOqmMaW3KCavt4hyigDvMKO4J uDJvTbrEdkv+MY77VM81UMnQUsB56yFnM2GsS+w2fC6/5Hpi2n0COHcx6 ZYaD9SgaOW8xLnyIy7x7gIqWp5EFOqNP6N2AWQvX3YqWAhsda2iWT2HtA +v/uUUVAAjihtp4dNlNGv2mnC/pwo/62JyVPW5bnpEIFXPie2w8/zUu44 dNvodGGreaDfBK5w5J0kwH6RujnI5qhjXi5P1gHZNOZhKXwvveiCfACQz A==; X-IronPort-AV: E=McAfee;i="6200,9189,10237"; a="332462062" X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="332462062" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2022 10:00:40 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="617333121" Received: from black.fi.intel.com ([10.237.72.28]) by FMSMGA003.fm.intel.com with ESMTP; 24 Jan 2022 10:00:29 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 68D70616; Mon, 24 Jan 2022 20:00:42 +0200 (EET) From: Andy Shevchenko To: Miquel Raynal , Greg Kroah-Hartman , Srinivas Kandagatla , Mika Westerberg , Andy Shevchenko , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Cc: Richard Weinberger , Vignesh Raghavendra , Andreas Noever , Michael Jamet , Yehezkel Bernat Subject: [PATCH v2 3/5] nvmem: core: Check input parameter for NULL in nvmem_unregister() Date: Mon, 24 Jan 2022 20:00:38 +0200 Message-Id: <20220124180040.50660-3-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124180040.50660-1-andriy.shevchenko@linux.intel.com> References: <20220124180040.50660-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org nvmem_unregister() frees resources and standard pattern is to allow caller to not care if it's NULL or not. This will reduce burden on the callers to perform this check. Signed-off-by: Andy Shevchenko --- v2: no changes drivers/nvmem/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 68db7d3303ac..53a43d843743 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -903,7 +903,8 @@ static void nvmem_device_release(struct kref *kref) */ void nvmem_unregister(struct nvmem_device *nvmem) { - kref_put(&nvmem->refcnt, nvmem_device_release); + if (nvmem) + kref_put(&nvmem->refcnt, nvmem_device_release); } EXPORT_SYMBOL_GPL(nvmem_unregister);