From patchwork Thu Nov 30 10:54:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lee Jones X-Patchwork-Id: 13474237 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 28C82249EC for ; Thu, 30 Nov 2023 10:55:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="M/7ElH+x" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A841AC433CA; Thu, 30 Nov 2023 10:55:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1701341718; bh=/XOh9djbd1kRjRIJaFEo79gsQogKZILFqya3ZNX3dzE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=M/7ElH+xTwmRE/jQTEQPLVFtUUURsQO7RbtCR9vxOg5H7Gx4ArBGSB9MkUmH5CF5E szynq61yJlRo4ltLpVSCDAMrZQiXgH3j9/qyA5woBqJqjsVy/uNlp5VKKajiNyCKMZ PmuSoGJGgyI611UCzIabzZySOnX+87zpCgULh+zKjXnF2nIZ/BvI58pKkaOUWM8ick mvUGbVqUhRs7VMauF6ygzEG+4Evd0+RI9YYZKy8aEaVn6ng2JizzUyalZjjxkT5LYG ylBtp51MF9qOLB6skfhw2WPf5GU7v6YFGgPJTTiemGSiESLpG1GExPLuPpuFzsZXvR FQ7MWMmPFKteQ== From: Lee Jones To: lee@kernel.org Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman , linux-usb@vger.kernel.org Subject: [PATCH 4/5] usb: gadget: Remove snprintf() from sysfs call-backs and replace with sysfs_emit() Date: Thu, 30 Nov 2023 10:54:38 +0000 Message-ID: <20231130105459.3208986-5-lee@kernel.org> X-Mailer: git-send-email 2.43.0.rc1.413.gea7ed67945-goog In-Reply-To: <20231130105459.3208986-1-lee@kernel.org> References: <20231130105459.3208986-1-lee@kernel.org> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Since snprintf() has the documented, but still rather strange trait of returning the length of the data that *would have been* written to the array if space were available, rather than the arguably more useful length of data *actually* written, it is usually considered wise to use something else instead in order to avoid confusion. In the case of sysfs call-backs, new wrappers exist that do just that. This patch replaces just one use of snprintf() found in the sysfs .show() call-back with the new sysfs_emit() helper. Link: https://lwn.net/Articles/69419/ Link: https://github.com/KSPP/linux/issues/105 Cc: Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org Signed-off-by: Lee Jones --- drivers/usb/gadget/configfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index 4c639e9ddedc0..b7d2a1313a684 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -812,7 +812,7 @@ static ssize_t gadget_string_s_show(struct config_item *item, char *page) struct gadget_string *string = to_gadget_string(item); int ret; - ret = snprintf(page, sizeof(string->string), "%s\n", string->string); + ret = sysfs_emit(page, "%s\n", string->string); return ret; }