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authorYinghai Lu <yinghai@kernel.org>2010-08-30 05:13:10 +0400
committerH. Peter Anvin <hpa@linux.intel.com>2010-09-21 21:18:33 +0400
commit74b3c444a963ba55aef89b33a1bcaada9a4c206f (patch)
treed336c71f0610e19787ef4350fc5ccdfb0057d212 /arch/x86/boot/early_serial_console.c
parent83d9f65bdae6f6b34d75282c6618d3f50846849a (diff)
downloadlinux-74b3c444a963ba55aef89b33a1bcaada9a4c206f.tar.xz
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>
Diffstat (limited to 'arch/x86/boot/early_serial_console.c')
-rw-r--r--arch/x86/boot/early_serial_console.c14
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 407a8e26f0a7..5df2869c874b 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;