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authorGeert Uytterhoeven <geert@linux-m68k.org>2013-12-01 11:14:51 +0100
committerGeert Uytterhoeven <geert@linux-m68k.org>2013-12-08 11:03:21 +0100
commit8a09cec25fa19a3a7e9f21b4186fecc69085a60f (patch)
tree09099f3d883d9e8736e8ba363ffc79560038a976 /arch/m68k/atari/debug.c
parentc6188d0f5756e3b20c216483cc7982d097c7b9de (diff)
downloadlinux-8a09cec25fa19a3a7e9f21b4186fecc69085a60f.tar.bz2
m68k/amiga,atari: Fix specifying multiple debug= parameters
Since commit d6713b4091a99fa2af2fabdcd2f3fb97f32ecf2e ("m68k: early parameter support"), the user can specify multiple debug consoles using the "debug=" kernel command line parameter. However, as there's only a single struct console object, which is reused, it would actually register the same console object multiple times, causing the following warning: WARNING: CPU: 0 PID: 0 at kernel/printk/printk.c:2233 register_console+0x36/ console 'debug0' already registered Make sure to register the console object only once, to avoid the warning. Note that still only one console (the one corresponding to the last "debug=" parameter) will be active at the same time, as the .write() method of the already registered console object is overwritten by a subsequent "debug=" parameter. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/atari/debug.c')
-rw-r--r--arch/m68k/atari/debug.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/m68k/atari/debug.c b/arch/m68k/atari/debug.c
index a547ba9683d1..03cb5e08d7cf 100644
--- a/arch/m68k/atari/debug.c
+++ b/arch/m68k/atari/debug.c
@@ -287,6 +287,8 @@ static void __init atari_init_midi_port(int cflag)
static int __init atari_debug_setup(char *arg)
{
+ bool registered;
+
if (!MACH_IS_ATARI)
return 0;
@@ -294,6 +296,7 @@ static int __init atari_debug_setup(char *arg)
/* defaults to ser2 for a Falcon and ser1 otherwise */
arg = MACH_IS_FALCON ? "ser2" : "ser1";
+ registered = !!atari_console_driver.write;
if (!strcmp(arg, "ser1")) {
/* ST-MFP Modem1 serial port */
atari_init_mfp_port(B9600|CS8);
@@ -317,7 +320,7 @@ static int __init atari_debug_setup(char *arg)
sound_ym.wd_data = sound_ym.rd_data_reg_sel | 0x20; /* strobe H */
atari_console_driver.write = atari_par_console_write;
}
- if (atari_console_driver.write)
+ if (atari_console_driver.write && !registered)
register_console(&atari_console_driver);
return 0;