Thread (8 messages) 8 messages, 4 authors, 2012-06-25

Re: [PATCH] bluetooth: opcode field of sent commands is little endian.

From: Michel Dänzer <hidden>
Date: 2012-06-25 07:06:24
Also in: linuxppc-dev

On Son, 2012-06-24 at 23:51 -0700, Marcel Holtmann wrote:=20
Hi Michel,
=20
quoted
Fixes built-in Bluetooth not working on Apple PowerBooks, regression fr=
om
quoted
commit 75fb0e324daa48ec458fb5c2960eb07b80cfad9d ('Bluetooth: Fix init s=
equence
quoted
for some CSR based controllers').
=20
Cc: stable@vger.kernel.org [v3.4]
Signed-off-by: Michel D=E4nzer <redacted>
---
 net/bluetooth/hci_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
=20
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index d6dc44c..e039e3d 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -92,7 +92,7 @@ void hci_req_complete(struct hci_dev *hdev, __u16 cmd=
, int result)
quoted
 		 * command.
 		 */
=20
-		if (cmd !=3D HCI_OP_RESET || sent->opcode =3D=3D HCI_OP_RESET)
+		if (cmd !=3D HCI_OP_RESET || sent->opcode =3D=3D cpu_to_le16(HCI_OP_=
RESET))
quoted
 			return;
=20
actually you could use __constant_cpu_to_le16() here.
Yes, but I checked and that's not used anywhere in the bluetooth code
yet, so I thought I'd stay consistent for now.

That said, this got actually fixed differently upstream. So I prefer if
that patch gets merged into stable and not this one.
=20
commit 1036b89042df96e71c0cb941be212f8053ecccc0
Author: Andrei Emeltchenko [off-list ref]
Date:   Mon Mar 12 15:59:33 2012 +0200
=20
    Bluetooth: Fix opcode access in hci_complete
Fine with me, though FWIW that not only doesn't use
__constant_cpu_to_le16() but actually swaps the non-constant value.

Also, it would have been nice if that fix was promoted to stable, so I
wouldn't have had to spend a good part of the weekend bisecting...

In general patches need to get into Linus' tree first before you can
even request them for stable.
I know, that's why I only put the stable tag in commit logs but don't
submit patches there via e-mail.


--=20
Earthling Michel D=E4nzer           |                   http://www.amd.com
Libre software enthusiast         |          Debian, X and DRI developer
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