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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 687C4C43334 for ; Tue, 7 Jun 2022 16:47:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243262AbiFGQq7 (ORCPT ); Tue, 7 Jun 2022 12:46:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56702 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232878AbiFGQq6 (ORCPT ); Tue, 7 Jun 2022 12:46:58 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B554F5527 for ; Tue, 7 Jun 2022 09:46:57 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1705061849 for ; Tue, 7 Jun 2022 16:46:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1F83CC385A5; Tue, 7 Jun 2022 16:46:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1654620416; bh=qgYIUBmlV4PfX8jqaZbIg2/3Q6mNImC3CzEIUFp8QhU=; h=Subject:To:Cc:From:Date:From; b=xGlz9Nb13cbUyOVx0NK2OT4fnhB/usqmOEbrapT0jLp9d8lZucp0ZmK+V3731c3gg CGunnT6NVIxTe5Z4vzM9KbufLHYbR6yWeXi6haZdwN+18jrJIAMcx0IWbY9wkDbDoM TpyH8s71BVaWh9nwvLzAxuZ2OxDitL0NlcL8+beI= Subject: FAILED: patch "[PATCH] tty: n_gsm: Fix packet data hex dump output" failed to apply to 5.4-stable tree To: tony@atomide.com, gregkh@linuxfoundation.org, swboyd@chromium.org Cc: From: Date: Tue, 07 Jun 2022 18:46:53 +0200 Message-ID: <165462041322125@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 925ea0fa5277c1e6bb9e51955ef34eea9736c3d7 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Thu, 12 May 2022 16:15:06 +0300 Subject: [PATCH] tty: n_gsm: Fix packet data hex dump output The module param debug for n_gsm uses KERN_INFO level, but the hexdump now uses KERN_DEBUG level. This started after commit 091cb0994edd ("lib/hexdump: make print_hex_dump_bytes() a nop on !DEBUG builds"). We now use dynamic_hex_dump() unless DEBUG is set. This causes no packets to be seen with modprobe n_gsm debug=0x1f unlike earlier. Let's fix this by adding gsm_hex_dump_bytes() that calls print_hex_dump() with KERN_INFO to match what n_gsm is doing with the other debug related output. Fixes: 091cb0994edd ("lib/hexdump: make print_hex_dump_bytes() a nop on !DEBUG builds") Cc: Stephen Boyd Signed-off-by: Tony Lindgren Link: https://lore.kernel.org/r/20220512131506.1216-1-tony@atomide.com Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 8fc05b60ac7f..137eebdcfda9 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -444,6 +444,25 @@ static u8 gsm_encode_modem(const struct gsm_dlci *dlci) return modembits; } +static void gsm_hex_dump_bytes(const char *fname, const u8 *data, + unsigned long len) +{ + char *prefix; + + if (!fname) { + print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, data, len, + true); + return; + } + + prefix = kasprintf(GFP_KERNEL, "%s: ", fname); + if (!prefix) + return; + print_hex_dump(KERN_INFO, prefix, DUMP_PREFIX_OFFSET, 16, 1, data, len, + true); + kfree(prefix); +} + /** * gsm_print_packet - display a frame for debug * @hdr: header to print before decode @@ -508,7 +527,7 @@ static void gsm_print_packet(const char *hdr, int addr, int cr, else pr_cont("(F)"); - print_hex_dump_bytes("", DUMP_PREFIX_NONE, data, dlen); + gsm_hex_dump_bytes(NULL, data, dlen); } @@ -698,9 +717,7 @@ static void gsm_data_kick(struct gsm_mux *gsm, struct gsm_dlci *dlci) } if (debug & 4) - print_hex_dump_bytes("gsm_data_kick: ", - DUMP_PREFIX_OFFSET, - gsm->txframe, len); + gsm_hex_dump_bytes(__func__, gsm->txframe, len); if (gsmld_output(gsm, gsm->txframe, len) <= 0) break; /* FIXME: Can eliminate one SOF in many more cases */ @@ -2444,8 +2461,7 @@ static int gsmld_output(struct gsm_mux *gsm, u8 *data, int len) return -ENOSPC; } if (debug & 4) - print_hex_dump_bytes("gsmld_output: ", DUMP_PREFIX_OFFSET, - data, len); + gsm_hex_dump_bytes(__func__, data, len); return gsm->tty->ops->write(gsm->tty, data, len); } @@ -2521,8 +2537,7 @@ static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp, char flags = TTY_NORMAL; if (debug & 4) - print_hex_dump_bytes("gsmld_receive: ", DUMP_PREFIX_OFFSET, - cp, count); + gsm_hex_dump_bytes(__func__, cp, count); for (; count; count--, cp++) { if (fp)