There are a lot of machines without i8042 controller nowadays. Sometimes i8042_controller_check returns 0 because i8042_flush does nothing (read from the port returns 0 and the while loop does not execute).
In that case, the probe method is called and fails with this error output to console: i8042: Can't read CTR while initializing i8042 i8042: probe of i8042 failed with error -5 Lower the former error message to be KERN_INFO and make the function in that case return -ENODEV instead of -EIO. This will suppress the latter. There is also an IBM support page about these messages: https://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=migr-5082417 Signed-off-by: Jiri Slaby <jsl...@suse.cz> --- drivers/input/serio/i8042.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c index 454195709a82..e83e3a0ac395 100644 --- a/drivers/input/serio/i8042.c +++ b/drivers/input/serio/i8042.c @@ -950,8 +950,8 @@ static int i8042_controller_init(void) udelay(50); if (i8042_command(&ctr[n++ % 2], I8042_CMD_CTL_RCTR)) { - pr_err("Can't read CTR while initializing i8042\n"); - return -EIO; + pr_info("Can't read CTR while initializing i8042. Either i8042 controller is not present or it does not respond.\n"); + return -ENODEV; } } while (n < 2 || ctr[0] != ctr[1]); -- 2.9.2
