This is a note to let you know that I've just added the patch titled
Bluetooth: ath3k: workaround the compatibility issue with xHCI controller
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bluetooth-ath3k-workaround-the-compatibility-issue-with-xhci-controller.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c561a5753dd631920c4459a067d22679b3d110d6 Mon Sep 17 00:00:00 2001
From: Adam Lee <adam.lee@xxxxxxxxxxxxx>
Date: Wed, 28 Jan 2015 15:30:27 -0500
Subject: Bluetooth: ath3k: workaround the compatibility issue with xHCI controller
From: Adam Lee <adam.lee@xxxxxxxxxxxxx>
commit c561a5753dd631920c4459a067d22679b3d110d6 upstream.
BugLink: https://bugs.launchpad.net/bugs/1400215
ath3k devices fail to load firmwares on xHCI buses, but work well on
EHCI, this might be a compatibility issue between xHCI and ath3k chips.
As my testing result, those chips will work on xHCI buses again with
this patch.
This workaround is from Qualcomm, they also did some workarounds in
Windows driver.
Signed-off-by: Adam Lee <adam.lee@xxxxxxxxxxxxx>
Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/bluetooth/ath3k.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/bluetooth/ath3k.c
+++ b/drivers/bluetooth/ath3k.c
@@ -151,6 +151,8 @@ static struct usb_device_id ath3k_blist_
#define USB_REQ_DFU_DNLOAD 1
#define BULK_SIZE 4096
#define FW_HDR_SIZE 20
+#define TIMEGAP_USEC_MIN 50
+#define TIMEGAP_USEC_MAX 100
static int ath3k_load_firmware(struct usb_device *udev,
const struct firmware *firmware)
@@ -181,6 +183,9 @@ static int ath3k_load_firmware(struct us
count -= 20;
while (count) {
+ /* workaround the compatibility issue with xHCI controller*/
+ usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);
+
size = min_t(uint, count, BULK_SIZE);
pipe = usb_sndbulkpipe(udev, 0x02);
memcpy(send_buf, firmware->data + sent, size);
@@ -277,6 +282,9 @@ static int ath3k_load_fwfile(struct usb_
count -= size;
while (count) {
+ /* workaround the compatibility issue with xHCI controller*/
+ usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);
+
size = min_t(uint, count, BULK_SIZE);
pipe = usb_sndbulkpipe(udev, 0x02);
Patches currently in stable-queue which might be from adam.lee@xxxxxxxxxxxxx are
queue-3.10/bluetooth-ath3k-workaround-the-compatibility-issue-with-xhci-controller.patch
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