linux-kernel - Re: Keyboard stops working after *lock [Was: 2.6.21-rc2-mm1]

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Message-ID: <Pine.LNX.4.64.0703091658350.26904@twin.jikos.cz>
Date:	Fri, 9 Mar 2007 17:01:30 +0100 (CET)
From:	Jiri Kosina <jikos@...os.cz>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
cc:	Jiri Slaby <jirislaby@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Richard Purdie <rpurdie@...ys.net>
Subject: Re: Keyboard stops working after *lock [Was: 2.6.21-rc2-mm1]

On Fri, 9 Mar 2007, Jiri Kosina wrote:

> If this is present also in vanilla and not only in -mm, could you please 
> try reverting commits 4237081e573b99a48991aa71364b0682c444651c and 
> d4ae650a904612ffb7edd3f28b69b022988d2466 and let me know if the 
> situation gets any better?

Hi Jiri,

or even better, does the patch below (against 2.6.21-rc3) fix the problem 
with your keyboard? I can see possibilities of report fields unaligned to 
the byte boundary, which this might be causing problems.

(the original patch author added to cc)

Thanks.

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index f4ee1af..f571513 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -873,10 +873,6 @@ static void hid_output_field(struct hid_field *field, __u8 *data)
 	unsigned size = field->report_size;
 	unsigned n;
 
-	/* make sure the unused bits in the last byte are zeros */
-	if (count > 0 && size > 0)
-		data[(offset+count*size-1)/8] = 0;
-
 	for (n = 0; n < count; n++) {
 		if (field->logical_minimum < 0)	/* signed values */
 			implement(data, offset + n * size, size, s32ton(field->value[n], size));
-
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