From patchwork Tue Dec 19 17:18:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hugo Villeneuve X-Patchwork-Id: 756325 Received: from mail.hugovil.com (mail.hugovil.com [162.243.120.170]) (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 1D94237146; Tue, 19 Dec 2023 17:19:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=hugovil.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=hugovil.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=hugovil.com header.i=@hugovil.com header.b="KVIIQGPA" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=hugovil.com ; s=x; h=Subject:Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Cc:To :From:subject:date:message-id:reply-to; bh=wIhfJw84538n4x2qE0zhacVXgJE56py7Ypbq2I5JZ+8=; b=KVIIQGPATtH3Pn7WYoG+KvGah1 r/Y7s9pDUYBP5gslMkJ4ByM1gjt4VOusKN7uVyelPl4vn7fZOCX42OUqa38RwQsxwEZReKq7fYICS aTX7k2GsdZSsOoYQWAX6xVQ3oBLRu/IjvB0O8aSemohXPODPOzb6r/4fkBuBR33KGF/M=; Received: from modemcable168.174-80-70.mc.videotron.ca ([70.80.174.168]:40128 helo=pettiford.lan) by mail.hugovil.com with esmtpa (Exim 4.92) (envelope-from ) id 1rFdkM-0007Ao-OM; Tue, 19 Dec 2023 12:19:11 -0500 From: Hugo Villeneuve To: gregkh@linuxfoundation.org, jirislaby@kernel.org, jringle@gridpoint.com, kubakici@wp.pl, phil@raspberrypi.org, bo.svangard@embeddedart.se Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, hugo@hugovil.com, Hugo Villeneuve , stable@vger.kernel.org, Andy Shevchenko Date: Tue, 19 Dec 2023 12:18:48 -0500 Message-Id: <20231219171903.3530985-5-hugo@hugovil.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231219171903.3530985-1-hugo@hugovil.com> References: <20231219171903.3530985-1-hugo@hugovil.com> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 70.80.174.168 X-SA-Exim-Mail-From: hugo@hugovil.com X-Spam-Level: X-Spam-Report: * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * -0.0 T_SCC_BODY_TEXT_LINE No description available. Subject: [PATCH 04/18] serial: sc16is7xx: improve do/while loop in sc16is7xx_irq() X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on mail.hugovil.com) From: Hugo Villeneuve Simplify and improve readability by replacing while(1) loop with do {} while, and by using the keep_polling variable as the exit condition, making it more explicit. Fixes: 834449872105 ("sc16is7xx: Fix for multi-channel stall") Cc: stable@vger.kernel.org Suggested-by: Andy Shevchenko Signed-off-by: Hugo Villeneuve --- drivers/tty/serial/sc16is7xx.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index b2d0f6d307bd..8a038a9be09e 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -782,17 +782,17 @@ static bool sc16is7xx_port_irq(struct sc16is7xx_port *s, int portno) static irqreturn_t sc16is7xx_irq(int irq, void *dev_id) { + bool keep_polling; + struct sc16is7xx_port *s = (struct sc16is7xx_port *)dev_id; - while (1) { - bool keep_polling = false; + do { + keep_polling = false; int i; for (i = 0; i < s->devtype->nr_uart; ++i) keep_polling |= sc16is7xx_port_irq(s, i); - if (!keep_polling) - break; - } + } while (keep_polling); return IRQ_HANDLED; }