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Input: atkbd - skip ATKBD_CMD_SETLEDS when skipping ATKBD_CMD_GETID 

commit 683cd8259a9b883a51973511f860976db2550a6e upstream.

After commit 936e4d49ecbc ("Input: atkbd - skip ATKBD_CMD_GETID in
translated mode") the keyboard on Dell XPS 13 9350 / 9360 / 9370 models
has stopped working after a suspend/resume.

The problem appears to be that atkbd_probe() fails when called
from atkbd_reconnect() on resume, which on systems where
ATKBD_CMD_GETID is skipped can only happen by ATKBD_CMD_SETLEDS
failing. ATKBD_CMD_SETLEDS failing because ATKBD_CMD_GETID was
skipped is weird, but apparently that is what is happening.

Fix this by also skipping ATKBD_CMD_SETLEDS when skipping
ATKBD_CMD_GETID.

Fixes: 936e4d49ecbc ("Input: atkbd - skip ATKBD_CMD_GETID in translated mode")
Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Closes: https://lore.kernel.org/linux-input/0aa4a61f-c939-46fe-a572-08022e8931c7@molgen.mpg.de/
Closes: https://bbs.archlinux.org/viewtopic.php?pid=2146300
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218424
Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2260517
Tested-by: Paul Menzel <pmenzel@molgen.mpg.de>
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240126160724.13278-2-hdegoede@redhat.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede 2024-01-26 17:07:23 +01:00 committed by Greg Kroah-Hartman
parent 315075ac73
commit 08249dc3d9
1 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/input/keyboard/atkbd.c
View File

@ -792,7 +792,6 @@ static int atkbd_probe(struct atkbd *atkbd)
{
struct ps2dev *ps2dev = &atkbd->ps2dev;
unsigned char param[2];
bool skip_getid;
/*
* Some systems, where the bit-twiddling when testing the io-lines of the
@ -806,6 +805,11 @@ static int atkbd_probe(struct atkbd *atkbd)
"keyboard reset failed on %s\n",
ps2dev->serio->phys);
if (atkbd_skip_getid(atkbd)) {
atkbd->id = 0xab83;
return 0;
}
/*
* Then we check the keyboard ID. We should get 0xab83 under normal conditions.
* Some keyboards report different values, but the first byte is always 0xab or
@ -814,18 +818,17 @@ static int atkbd_probe(struct atkbd *atkbd)
*/
param[0] = param[1] = 0xa5; /* initialize with invalid values */
skip_getid = atkbd_skip_getid(atkbd);
if (skip_getid || ps2_command(ps2dev, param, ATKBD_CMD_GETID)) {
if (ps2_command(ps2dev, param, ATKBD_CMD_GETID)) {
/*
* If the get ID command was skipped or failed, we check if we can at least set
* If the get ID command failed, we check if we can at least set
* the LEDs on the keyboard. This should work on every keyboard out there.
* It also turns the LEDs off, which we want anyway.
*/
param[0] = 0;
if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
return -1;
atkbd->id = skip_getid ? 0xab83 : 0xabba;
atkbd->id = 0xabba;
return 0;
}