diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2010-08-29 18:13:10 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-09-21 10:18:33 -0700 |
| commit | 74b3c444a963ba55aef89b33a1bcaada9a4c206f (patch) | |
| tree | d336c71f0610e19787ef4350fc5ccdfb0057d212 | |
| parent | 83d9f65bdae6f6b34d75282c6618d3f50846849a (diff) | |
x86, setup: Fix earlyprintk=serial,0x3f8,115200
earlyprintk can take and I/O port, so we need to handle this case in
the setup code too, otherwise 0x3f8 will be treated as a baud rate.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4C7B05A6.4010801@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| -rw-r--r-- | arch/x86/boot/early_serial_console.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/x86/boot/early_serial_console.c b/arch/x86/boot/early_serial_console.c index 407a8e26f0a..5df2869c874 100644 --- a/arch/x86/boot/early_serial_console.c +++ b/arch/x86/boot/early_serial_console.c @@ -58,7 +58,19 @@ static void parse_earlyprintk(void) if (arg[pos] == ',') pos++; - if (!strncmp(arg + pos, "ttyS", 4)) { + /* + * make sure we have + * "serial,0x3f8,115200" + * "serial,ttyS0,115200" + * "ttyS0,115200" + */ + if (pos == 7 && !strncmp(arg + pos, "0x", 2)) { + port = simple_strtoull(arg + pos, &e, 16); + if (port == 0 || arg + pos == e) + port = DEFAULT_SERIAL_PORT; + else + pos = e - arg; + } else if (!strncmp(arg + pos, "ttyS", 4)) { static const int bases[] = { 0x3f8, 0x2f8 }; int idx = 0; |