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[PATCH -v2] Input: i8042: Add dbg msg when a command can't write its parameter

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  [PATCH -v2] Input: i8042: Add dbg msg when a command can't write its parameter Marcos Paulo de Souza <marcos.souza.org@gmail.com> - 2017-01-22 19:00 +0100
    Re: [PATCH -v2] Input: i8042: Add dbg msg when a command can't write  its parameter Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2017-01-22 23:40 +0100

#1564482 — [PATCH -v2] Input: i8042: Add dbg msg when a command can't write its parameter

This can happen in cases like bug #102951[1], so add a proper debug msg
as done in wait_read. Also, change wait_read debug message to differ from
wait_write.

[1] https://bugzilla.kernel.org/show_bug.cgi?id=102951

Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
---
Changes from v1:
 * use dbg instead of pr_warn

 drivers/input/serio/i8042.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index 62685a7..cba6831 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -312,8 +312,10 @@ static int __i8042_command(unsigned char *param, int command)
 
 	for (i = 0; i < ((command >> 12) & 0xf); i++) {
 		error = i8042_wait_write();
-		if (error)
+		if (error) {
+			dbg("     -- i8042 (timeout wait_write)\n");
 			return error;
+		}
 		dbg("%02x -> i8042 (parameter)\n", param[i]);
 		i8042_write_data(param[i]);
 	}
@@ -321,7 +323,7 @@ static int __i8042_command(unsigned char *param, int command)
 	for (i = 0; i < ((command >> 8) & 0xf); i++) {
 		error = i8042_wait_read();
 		if (error) {
-			dbg("     -- i8042 (timeout)\n");
+			dbg("     -- i8042 (timeout wait_read)\n");
 			return error;
 		}
 
-- 
2.9.3

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#1564581 — Re: [PATCH -v2] Input: i8042: Add dbg msg when a command can't write its parameter

On Sun, Jan 22, 2017 at 03:55:19PM -0200, Marcos Paulo de Souza wrote:
> This can happen in cases like bug #102951[1], so add a proper debug msg
> as done in wait_read. Also, change wait_read debug message to differ from
> wait_write.
> 
> [1] https://bugzilla.kernel.org/show_bug.cgi?id=102951
> 
> Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>

Applied, thank you.

> ---
> Changes from v1:
>  * use dbg instead of pr_warn
> 
>  drivers/input/serio/i8042.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
> index 62685a7..cba6831 100644
> --- a/drivers/input/serio/i8042.c
> +++ b/drivers/input/serio/i8042.c
> @@ -312,8 +312,10 @@ static int __i8042_command(unsigned char *param, int command)
>  
>  	for (i = 0; i < ((command >> 12) & 0xf); i++) {
>  		error = i8042_wait_write();
> -		if (error)
> +		if (error) {
> +			dbg("     -- i8042 (timeout wait_write)\n");
>  			return error;
> +		}
>  		dbg("%02x -> i8042 (parameter)\n", param[i]);
>  		i8042_write_data(param[i]);
>  	}
> @@ -321,7 +323,7 @@ static int __i8042_command(unsigned char *param, int command)
>  	for (i = 0; i < ((command >> 8) & 0xf); i++) {
>  		error = i8042_wait_read();
>  		if (error) {
> -			dbg("     -- i8042 (timeout)\n");
> +			dbg("     -- i8042 (timeout wait_read)\n");
>  			return error;
>  		}
>  
> -- 
> 2.9.3
> 

-- 
Dmitry

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