From ca90bbd410a1dc4b607210a5483786726043e9ec Mon Sep 17 00:00:00 2001
From: Evan Green <evgreen@chromium.org>
Date: Thu, 11 Jul 2019 20:52:39 -0700
Subject: [PATCH] scripts/decode_stacktrace: Accept dash/underscore in modules

The manpage for modprobe mentions that dashes and underscores are
treated interchangeably in module names.  The stack trace dumps seem to
print module names with underscores.  Use bash to replace _ with the
pattern [-_] so that file names with dashes or underscores can be found.

For example, this line:
[   27.919759]  hda_widget_sysfs_init+0x2b8/0x3a5 [snd_hda_core]

should find a module named snd-hda-core.ko.

Link: http://lkml.kernel.org/r/20190531205926.42474-1-evgreen@chromium.org
Signed-off-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Evan Green <evgreen@chromium.org>
Cc: Nicolas Boichat <drinkcat@chromium.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Manuel Traut <manut@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/decode_stacktrace.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index fa704f17275e..13e5fbafdf2f 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -28,7 +28,7 @@ parse_symbol() {
 		local objfile=${modcache[$module]}
 	else
 		[[ $modpath == "" ]] && return
-		local objfile=$(find "$modpath" -name "$module.ko*" -print -quit)
+		local objfile=$(find "$modpath" -name "${module//_/[-_]}.ko*" -print -quit)
 		[[ $objfile == "" ]] && return
 		modcache[$module]=$objfile
 	fi