Re: [Bluez-devel] bccmd(csr_bcsp.c) bug Report

[Frank Mandarino <fmandarino@endrelia.com>]

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Marcel Holtmann wrote:
> Hi,
> 
>> I think that do_command function (csr_bcsp.c) could have a problem 
>>
>> if we receive both UBCSP_PACKET_SENT and UBCSP_PACKET_RECEIVED
>> simultaneously from ubcsp_poll function.
>>
>> An expected scenario is that UBCSP_PACKET_SENT comes earlier than
>> UBCSP_PACKET_RECEIVED.
>>
>> But if we get them at the same time this could be a problem because
>> “sent=1” is located after checking “sent==1”.
>>
>> It means that this program doesn’t know UBCSP_PACKET_SENT even if we
>> already receive it.
> 
> please sent a patch (unified diff) for it.
> 
> Regards
> 
> Marcel

Hi Marcel,

I sent in a patch for this back in August 2006
(http://article.gmane.org/gmane.linux.bluez.devel/8836).

The patch still applies to the latest CVS source.  I have attached it to
this post.

Regards
../fam
-- 
Frank Mandarino                                fmandarino(a)endrelia.com
Endrelia Technologies Inc.
Toronto, Ontario, Canada

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Index: utils/tools/csr_bcsp.c
===================================================================
RCS file: /cvsroot/bluez/utils/tools/csr_bcsp.c,v
retrieving revision 1.6
diff -u -r1.6 csr_bcsp.c
--- utils/tools/csr_bcsp.c	26 Jul 2006 13:32:45 -0000	1.6
+++ utils/tools/csr_bcsp.c	30 Aug 2006 15:06:56 -0000
@@ -188,19 +188,6 @@
 	while (1) {
 		delay = ubcsp_poll(&activity);
 
-		if (activity & UBCSP_PACKET_RECEIVED) {
-			if (sent && receive_packet.channel == 5 &&
-					receive_packet.payload[0] == 0xff) {
-				memcpy(rp, receive_packet.payload,
-							receive_packet.length);
-				break;
-			}
-
-			receive_packet.length = 512;
-			ubcsp_receive_packet(&receive_packet);
-			timeout = 0;
-		}
-
 		if (activity & UBCSP_PACKET_SENT) {
 			switch (varid) {
 			case CSR_VARID_COLD_RESET:
@@ -214,6 +201,19 @@
 			timeout = 0;
 		}
 
+		if (activity & UBCSP_PACKET_RECEIVED) {
+			if (sent && receive_packet.channel == 5 &&
+					receive_packet.payload[0] == 0xff) {
+				memcpy(rp, receive_packet.payload,
+							receive_packet.length);
+				break;
+			}
+
+			receive_packet.length = 512;
+			ubcsp_receive_packet(&receive_packet);
+			timeout = 0;
+		}
+
 		if (delay) {
 			usleep(delay * 100);
 

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