From: Kees Cook <keescook@chromium.org>
Date: Wed, 6 May 2020 23:34:42 +0000 (-0700)
Subject: pstore: Make sure console capturing will restart
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b7753fc7f6f5626e51ee78156fd801fb52163af0;p=linux.git

pstore: Make sure console capturing will restart

The CON_ENABLED flag gets cleared during unregister_console(), so make
sure we already reset the console flags before calling register_console(),
otherwise unloading and reloading a pstore backend will not restart
console logging.

Signed-off-by: Kees Cook <keescook@chromium.org>
---

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 398785ab059ff..8beaeff723863 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -516,12 +516,16 @@ static void pstore_console_write(struct console *con, const char *s, unsigned c)
 static struct console pstore_console = {
 	.name	= "pstore",
 	.write	= pstore_console_write,
-	.flags	= CON_PRINTBUFFER | CON_ENABLED | CON_ANYTIME,
 	.index	= -1,
 };
 
 static void pstore_register_console(void)
 {
+	/*
+	 * Always initialize flags here since prior unregister_console()
+	 * calls may have changed settings (specifically CON_ENABLED).
+	 */
+	pstore_console.flags = CON_PRINTBUFFER | CON_ENABLED | CON_ANYTIME;
 	register_console(&pstore_console);
 }