From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com ([209.132.183.28]:44016 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752361Ab0KIVlt (ORCPT ); Tue, 9 Nov 2010 16:41:49 -0500 Date: Tue, 9 Nov 2010 16:41:46 -0500 From: Jarod Wilson To: linux-media@vger.kernel.org Cc: David =?iso-8859-1?Q?H=E4rdeman?= Subject: [PATCH 2/3 v2] mceusb: buffer parsing fixups for 1st-gen device Message-ID: <20101109214146.GF11073@redhat.com> References: <20101109213921.GD11073@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101109213921.GD11073@redhat.com> List-ID: Sender: If we pass in an offset, we shouldn't skip 2 bytes. And the first-gen hardware generates a constant stream of interrupts, always with two header bytes, and if there's been no IR, with nothing else. Bail from ir processing without calling ir_handle_raw_event when we get such a buffer delivered to us. Signed-off-by: Jarod Wilson --- drivers/media/IR/mceusb.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/drivers/media/IR/mceusb.c b/drivers/media/IR/mceusb.c index 1811098..ed151c8 100644 --- a/drivers/media/IR/mceusb.c +++ b/drivers/media/IR/mceusb.c @@ -446,7 +446,7 @@ static void mceusb_dev_printdata(struct mceusb_dev *ir, char *buf, return; /* skip meaningless 0xb1 0x60 header bytes on orig receiver */ - if (ir->flags.microsoft_gen1 && !out) + if (ir->flags.microsoft_gen1 && !out && !offset) skip = 2; if (len <= skip) @@ -807,6 +807,10 @@ static void mceusb_process_ir_data(struct mceusb_dev *ir, int buf_len) if (ir->flags.microsoft_gen1) i = 2; + /* if there's no data, just return now */ + if (buf_len <= i) + return; + for (; i < buf_len; i++) { switch (ir->parser_state) { case SUBCMD: -- 1.7.1 -- Jarod Wilson jarod@redhat.com