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um: kmsg_dumper: always dump when not tty console 

With the addition of the ttynull console driver, the chance that a
console driver was already registerd did increase. Refine the logic when
to dump the kernel message buffer: always dump the buffer, when the UML
stdio console driver is not active and the preferred console.

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Thomas Meyer 2021-01-07 09:05:31 +01:00 committed by Richard Weinberger
parent d7ffac3363
commit e23fe90dec
1 changed files with 7 additions and 2 deletions
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9
arch/um/kernel/kmsg_dump.c
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@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/kmsg_dump.h>
#include <linux/console.h>
#include <linux/string.h>
#include <shared/init.h>
#include <shared/kern.h>
#include <os.h>
@ -16,8 +17,12 @@ static void kmsg_dumper_stdout(struct kmsg_dumper *dumper,
if (!console_trylock())
return;
for_each_console(con)
break;
for_each_console(con) {
if(strcmp(con->name, "tty") == 0 &&
(con->flags & (CON_ENABLED | CON_CONSDEV)) != 0) {
break;
}
}
console_unlock();