From patchwork Tue Nov 30 02:27:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Protsenko X-Patchwork-Id: 12694061 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A3AF4C433F5 for ; Tue, 30 Nov 2021 02:29:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=lLH1EImjCAl6XfvMBUadAxkhPzelzsqS7t3L0g+7k6M=; b=fc/BWyuCi92yW2 bcQNhaCosE9HEpQLNueh2YE8M/bzkjFoYuUVPZ18TM2Rcj3cH7Z0SDDEwKPrqQGYxPmssBvhmffUZ mJKfw4YYhrd9NE8ibQ7ZRAZuPAheE4Bx4kRH2xkIHhX6a0dz02lgNMwyUVfKgIVgHFL2iSjkd3Eqj DVkOlcRbOnTbpd/lnDelwYIxs6z2lQa1VxNonYBP8DwoPSf0OHqLcTi0ccs9Me5Z6hHdh6QMksew/ mVhvbjEIyGn0/dogcrAwFTVI6Mvn0WbQvOVg59nxmbHLr0RF/82gIDc9ocS4E0r9CkuYKMe/JVE8Q FxCD6bF696IF2aD6qiLw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mrssS-003L3G-3V; Tue, 30 Nov 2021 02:28:16 +0000 Received: from mail-lf1-x134.google.com ([2a00:1450:4864:20::134]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mrsry-003Kvj-7T for linux-arm-kernel@lists.infradead.org; Tue, 30 Nov 2021 02:27:48 +0000 Received: by mail-lf1-x134.google.com with SMTP id bi37so49725100lfb.5 for ; Mon, 29 Nov 2021 18:27:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Sw2B10ZabkZdmPrt9wGzMiX2Z/pOJb9hGFk18ZvN3TQ=; b=uRRTnpkmJRovj4VGeoOzMQOMFnOY81vWLi0/mNmNtunh+im+Uz0dayEunYo1fCe2ld bM40bIqqEg4vMN5NXV6yloNgcjgguQq4GqW6o6JqGg6sgEagOlVKxdAt/ONGKUI0s+Ck JOsabDC3E0AgueQbyOpH/3bKJv2k5WgfBCqbkVjPj3BRO54gdIwbk1oxvyxxO7OiNP9t 47zZ1Ft56KoaxyD+K2d0qwOsAPCnLxFBFKMAiDQNZoKg/JAt1m26GPlOuZ75wlhnNqET TnzFwlKSinO9ACD7KS2vVyzNSdvW4X5P6qKO6VzbGfuogOgN6MNwcTgoV2aLitc9mCc+ NNFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Sw2B10ZabkZdmPrt9wGzMiX2Z/pOJb9hGFk18ZvN3TQ=; b=TjotPvH1W76J5d0d2LbFaOvJa+SZJcf8lxpHkFz6tr/ZGRvwH2xAcKWUKZzCxEK0AQ r18cXNzbisFx/B9RWQdpV8dSjckUS1h/arq2voJ1lE8A4y80BDTf06jsaGfsMBwJDvOz ujIs/6ZLsgzWJ6s+p0kYeHO73AoIagI1s/w5WxyFDtC35YUO6pEJRMWyyzYJYrvsPzHY 3JS9ogJWk1+2OEeYkDw6Me69jYpYQWH3O8aDSXWw6ZUyDXTrx+gBvyMhKk00mzfrBm2j OPKILKRF2eZmsQTmRpF9M2MposHJCZmipaotmwN52zPNRCGoO1oQ7+NB+Eib8+0CH7H5 1Z8A== X-Gm-Message-State: AOAM531Q12oZv/ymi8+NokqVkk1abXG6TuvNeOegngTltUeWyjN/t94j YLVXglQ16zBbFnE+WbRy+/liZA== X-Google-Smtp-Source: ABdhPJzaKLAxg0ubI311l+8aBbMJGAYwd17eXVXKm69X/tqVUamxhV/v6ZUDEhxuMQ8udSKC8hDRAQ== X-Received: by 2002:a19:6717:: with SMTP id b23mr51152485lfc.659.1638239264749; Mon, 29 Nov 2021 18:27:44 -0800 (PST) Received: from localhost ([31.134.121.151]) by smtp.gmail.com with ESMTPSA id f10sm1537494lfu.122.2021.11.29.18.27.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Nov 2021 18:27:44 -0800 (PST) From: Sam Protsenko To: Krzysztof Kozlowski , Rob Herring , Greg Kroah-Hartman Cc: Jiri Slaby , Jaewon Kim , Chanho Park , David Virag , Youngmin Nam , devicetree@vger.kernel.org, linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH v2 5/5] tty: serial: samsung: Fix console registration from module Date: Tue, 30 Nov 2021 04:27:40 +0200 Message-Id: <20211130022740.28784-3-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211130022740.28784-1-semen.protsenko@linaro.org> References: <20211130022740.28784-1-semen.protsenko@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211129_182746_319200_705314BE X-CRM114-Status: GOOD ( 16.66 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On modern Exynos SoCs (like Exynos850) the UART can be implemented as a part of USI IP-core. In such case, USI driver is used to initialize USI registers, and it also calls of_platform_populate() to instantiate all sub-nodes (e.g. serial node) of USI node. When serial driver is built-in, but USI driver is a module, and CONFIG_SERIAL_SAMSUNG_CONSOLE is enabled, next call chain will happen when loading USI module from user space: usi_init v usi_probe v of_platform_populate v s3c24xx_serial_probe v uart_add_one_port v uart_configure_port v register_console v try_enable_new_console v s3c24xx_serial_console_setup But because the serial driver is built-in, and s3c24xx_serial_console_setup() is marked with __init keyword, that symbol will discarded and long gone by that time already, causing failed paging request. That happens during the next config combination: EXYNOS_USI=m SERIAL_SAMSUNG=y SERIAL_SAMSUNG_CONSOLE=y That config should be completely possible, so rather than limiting SERIAL_SAMSUNG choice to "m" only when USI=m, remove __init keyword for all affected functions. Signed-off-by: Sam Protsenko --- Changes in v2: - This patch is added in v2 drivers/tty/serial/samsung_tty.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 61ccb359620a..d002a4e48ed9 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -2500,7 +2500,8 @@ s3c24xx_serial_console_write(struct console *co, const char *s, uart_console_write(cons_uart, s, count, s3c24xx_serial_console_putchar); } -static void __init +/* Shouldn't be __init, as it can be instantiated from other module */ +static void s3c24xx_serial_get_options(struct uart_port *port, int *baud, int *parity, int *bits) { @@ -2563,7 +2564,8 @@ s3c24xx_serial_get_options(struct uart_port *port, int *baud, } } -static int __init +/* Shouldn't be __init, as it can be instantiated from other module */ +static int s3c24xx_serial_console_setup(struct console *co, char *options) { struct uart_port *port;