diff options
Diffstat (limited to 'common/i8042.c')
| -rw-r--r-- | common/i8042.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/common/i8042.c b/common/i8042.c index 5c3b1bbf06..e474bdd3ac 100644 --- a/common/i8042.c +++ b/common/i8042.c @@ -46,8 +46,18 @@ struct host_byte { uint8_t byte; }; -/* 4 is big enough for all i8042 commands */ -static uint8_t from_host_buffer[4 * sizeof(struct host_byte)]; + +/* + * we see from kernel is: + * + * d1 -> i8042 (command) # enable A20 in i8042_platform_init() of + * df -> i8042 (parameter) # serio/i8042-x86ia64io.h file. + * ff -> i8042 (command) + * 20 -> i8042 (command) # read CTR + * + * Hence, 5 (actually 4 plus one spare) is large enough, but use 8 for safety. + */ +static uint8_t from_host_buffer[8 * sizeof(struct host_byte)]; static struct queue from_host = { .buf_bytes = sizeof(from_host_buffer), .unit_bytes = sizeof(struct host_byte), |