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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_RED, USER_AGENT_GIT autolearn=unavailable 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 94D19C433DB for ; Mon, 28 Dec 2020 16:27:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 63D65208B6 for ; Mon, 28 Dec 2020 16:27:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2633433AbgL1Q1I (ORCPT ); Mon, 28 Dec 2020 11:27:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:35858 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730942AbgL1NIb (ORCPT ); Mon, 28 Dec 2020 08:08:31 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id BF79A21D94; Mon, 28 Dec 2020 13:08:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609160896; bh=ZQx4jiJYSqq0ifLV2fS+ihkyAB+CjY19pTM7Afr80S8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FFjoX43TD+MDOHaW6R+DYwmIIwNrbMUuP/MIQhm31xOAHy7gfH8vAVuiNKS/KtyJ3 ZtzYxLSz0RVmTkXemezp9KeYTjtGCKo3IFu7eE1zu90sbmWtapdE1Qfab3dyjukjk3 UTsy1p9u9KSsULsQbTEvchg3lxMjndbzdIrWgRVs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Thomas Gleixner , Thomas Winischhofer , linux-usb@vger.kernel.org Subject: [PATCH 4.14 031/242] USB: sisusbvga: Make console support depend on BROKEN Date: Mon, 28 Dec 2020 13:47:16 +0100 Message-Id: <20201228124906.194088309@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201228124904.654293249@linuxfoundation.org> References: <20201228124904.654293249@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Thomas Gleixner commit 862ee699fefe1e6d6f2c1518395f0b999b8beb15 upstream. The console part of sisusbvga is broken vs. printk(). It uses in_atomic() to detect contexts in which it cannot sleep despite the big fat comment in preempt.h which says: Do not use in_atomic() in driver code. in_atomic() does not work on kernels with CONFIG_PREEMPT_COUNT=n which means that spin/rw_lock held regions are not detected by it. There is no way to make this work by handing context information through to the driver and this only can be solved once the core printk infrastructure supports sleepable console drivers. Make it depend on BROKEN for now. Fixes: 1bbb4f2035d9 ("[PATCH] USB: sisusb[vga] update") Signed-off-by: Thomas Gleixner Cc: Thomas Winischhofer Cc: Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20201019101109.603244207@linutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/sisusbvga/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/usb/misc/sisusbvga/Kconfig +++ b/drivers/usb/misc/sisusbvga/Kconfig @@ -15,7 +15,7 @@ config USB_SISUSBVGA config USB_SISUSBVGA_CON bool "Text console and mode switching support" if USB_SISUSBVGA - depends on VT + depends on VT && BROKEN select FONT_8x16 ---help--- Say Y here if you want a VGA text console via the USB dongle or