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Date: Mon, 12 Oct 2009 20:24:14 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: "Carlos R. Mafra" <crmafra2@...il.com>
Cc: linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
linux-input@...r.kernel.org
Subject: Re: [bisected regression] Touchpad "paste" stops working after
suspend to RAM
On Mon, Oct 12, 2009 at 12:09:29PM +0200, Carlos R. Mafra wrote:
> On Mon 12.Oct'09 at 2:02:24 -0700, Dmitry Torokhov wrote:
> > Still, I am curious to know why we can't simply reinitialize ALPS from
> > the get go, could you please send me a dmesg of resume done with
> > i8042.debug? Thanks!
>
> The dmesg was too big, so I uploaded the ~5000 lines worth of syslog
> from 2.6.32-rc4 with i8042.debug info with a suspend to RAM to
>
> http://www.aei.mpg.de/~crmafra/syslog-i8042.debug.txt
>
> I hope this helps!
Could you please try this patch and let me know if it helps. Anotehr
i8042.dmesg would be much appreciated.
--
Dmitry
Input: psmouse - retry reset command if first one fails
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
Sometimes mice are not ready for a command and respond with 0xfe;
failure to reset mouse can lead to losing the device to let's try
harder and repeat the command after delay.
Signed-off-by: Dmitry Torokhov <dtor@...l.ru>
---
drivers/input/mouse/psmouse-base.c | 13 ++++++++++++-
drivers/input/serio/libps2.c | 31 +++++++++++++++++--------------
2 files changed, 29 insertions(+), 15 deletions(-)
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index 690aed9..52ad50f 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -395,8 +395,19 @@ int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
int psmouse_reset(struct psmouse *psmouse)
{
unsigned char param[2];
+ int error;
+
+ error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT);
+ if (error == -EAGAIN) {
+ /*
+ * Controller requested us to resend the command.
+ */
+ msleep(100);
+ error = ps2_command(&psmouse->ps2dev,
+ param, PSMOUSE_CMD_RESET_BAT);
+ }
- if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
+ if (error)
return -1;
if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c
index f3876ac..5201b0c 100644
--- a/drivers/input/serio/libps2.c
+++ b/drivers/input/serio/libps2.c
@@ -39,7 +39,7 @@ MODULE_LICENSE("GPL");
int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout)
{
serio_pause_rx(ps2dev->serio);
- ps2dev->nak = 1;
+ ps2dev->nak = ETIME;
ps2dev->flags |= PS2_FLAG_ACK;
serio_continue_rx(ps2dev->serio);
@@ -187,17 +187,17 @@ int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command)
int timeout;
int send = (command >> 12) & 0xf;
int receive = (command >> 8) & 0xf;
- int rc = -1;
+ int rc;
int i;
if (receive > sizeof(ps2dev->cmdbuf)) {
WARN_ON(1);
- return -1;
+ return -EINVAL;
}
if (send && !param) {
WARN_ON(1);
- return -1;
+ return -EINVAL;
}
serio_pause_rx(ps2dev->serio);
@@ -213,13 +213,16 @@ int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command)
* ACKing the reset command, and so it can take a long
* time before the ACK arrrives.
*/
- if (ps2_sendbyte(ps2dev, command & 0xff,
- command == PS2_CMD_RESET_BAT ? 1000 : 200))
+ rc = ps2_sendbyte(ps2dev, command & 0xff,
+ command == PS2_CMD_RESET_BAT ? 1000 : 200);
+ if (rc)
goto out;
- for (i = 0; i < send; i++)
- if (ps2_sendbyte(ps2dev, param[i], 200))
+ for (i = 0; i < send; i++) {
+ rc = ps2_sendbyte(ps2dev, param[i], 200);
+ if (rc)
goto out;
+ }
/*
* The reset command takes a long time to execute.
@@ -240,10 +243,10 @@ int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command)
for (i = 0; i < receive; i++)
param[i] = ps2dev->cmdbuf[(receive - 1) - i];
- if (ps2dev->cmdcnt && (command != PS2_CMD_RESET_BAT || ps2dev->cmdcnt != 1))
+ if (ps2dev->cmdcnt && (command != PS2_CMD_RESET_BAT || ps2dev->cmdcnt != 1)) {
+ rc = ETIME;
goto out;
-
- rc = 0;
+ }
out:
serio_pause_rx(ps2dev->serio);
@@ -293,13 +296,13 @@ int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data)
case PS2_RET_NAK:
ps2dev->flags |= PS2_FLAG_NAK;
- ps2dev->nak = PS2_RET_NAK;
+ ps2dev->nak = EAGAIN;
break;
case PS2_RET_ERR:
if (ps2dev->flags & PS2_FLAG_NAK) {
ps2dev->flags &= ~PS2_FLAG_NAK;
- ps2dev->nak = PS2_RET_ERR;
+ ps2dev->nak = EIO;
break;
}
@@ -365,7 +368,7 @@ EXPORT_SYMBOL(ps2_handle_response);
void ps2_cmd_aborted(struct ps2dev *ps2dev)
{
if (ps2dev->flags & PS2_FLAG_ACK)
- ps2dev->nak = 1;
+ ps2dev->nak = EIO;
if (ps2dev->flags & (PS2_FLAG_ACK | PS2_FLAG_CMD))
wake_up(&ps2dev->wait);
--
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