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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 10FB4C07E9B for ; Mon, 19 Jul 2021 14:38:44 +0000 (UTC) Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5FAE561107 for ; Mon, 19 Jul 2021 14:38:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5FAE561107 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=phytium.com.cn Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 0D32882C55; Mon, 19 Jul 2021 16:38:12 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=phytium.com.cn Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Received: by phobos.denx.de (Postfix, from userid 109) id 40A3082A01; Mon, 19 Jul 2021 09:37:05 +0200 (CEST) Received: from zg8tmty1ljiyny4xntqumjca.icoremail.net (zg8tmty1ljiyny4xntqumjca.icoremail.net [165.227.154.27]) by phobos.denx.de (Postfix) with SMTP id 8FFC682A01 for ; Mon, 19 Jul 2021 09:37:02 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=phytium.com.cn Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=chenbaozi@phytium.com.cn Received: from localhost (unknown [218.76.62.144]) by c1app6 (Coremail) with SMTP id BgINCgCHj8NnK_VgF586AA--.26182S3; Mon, 19 Jul 2021 15:36:07 +0800 (CST) From: Chen Baozi To: u-boot@lists.denx.de Cc: Simon Glass , Tom Rini , Stefan Roese Subject: [PATCH v2] serial: pl011: Resend the character if FIFO is full in debug uart Date: Mon, 19 Jul 2021 15:36:04 +0800 Message-Id: <20210719073604.17252-1-chenbaozi@phytium.com.cn> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID: BgINCgCHj8NnK_VgF586AA--.26182S3 X-Coremail-Antispam: 1UD129KBjvdXoW7Xw4xJw47ur48tw47JFyfXrb_yoW3ZFX_C3 ZFkryDtr40vF4Sga47AryavryrCrZxZ3ZYqF1qqas3urZrAFZ8XanFvF9rJr4Yk34UuF47 Jrn7Ga42y39xJjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb2kYjsxI4VWDJwAYFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I 6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM2 8CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0 cI8IcVCY1x0267AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwV C2z280aVCY1x0267AKxVWxJr0_GcWle2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xv F2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r4j6F 4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCY02Avz4vE14v_GF4l42xK 82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGw C20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48J MIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMI IF0xvE42xK8VAvwI8IcIk0rVWrZr1j6s0DMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvE x4A2jsIEc7CjxVAFwI0_Jr0_GrUvcSsGvfC2KfnxnUUI43ZEXa7IU0na93UUUUU== X-CM-SenderInfo: hfkh0updr2xqxsk13x1xpou0fpof0/1tbiAQDUP17E4brkCAACsF X-Mailman-Approved-At: Mon, 19 Jul 2021 16:38:01 +0200 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.34 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.2 at phobos.denx.de X-Virus-Status: Clean pl01x_putc() might return -EAGAIN if there was no space in FIFO. In that case, high-level caller should wait until there is space and resend the character. Signed-off-by: Chen Baozi Reviewed-by: Stefan Roese --- drivers/serial/serial_pl01x.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c index 76b96ad414..8ff19acf33 100644 --- a/drivers/serial/serial_pl01x.c +++ b/drivers/serial/serial_pl01x.c @@ -417,7 +417,8 @@ static inline void _debug_uart_putc(int ch) { struct pl01x_regs *regs = (struct pl01x_regs *)CONFIG_DEBUG_UART_BASE; - pl01x_putc(regs, ch); + while (pl01x_putc(regs, ch) == -EAGAIN) + ; } DEBUG_UART_FUNCS -- 2.28.0