linux-kernel - [PATCH] bluetooth: bfusb: Check the endpoint type at probe

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Date:   Fri, 13 May 2022 20:43:03 +0800
From:   Zheyu Ma <zheyuma97@...il.com>
To:     marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com
Cc:     linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        Zheyu Ma <zheyuma97@...il.com>
Subject: [PATCH] bluetooth: bfusb: Check the endpoint type at probe

The driver reported an warning in usb_submit_urb() which is caused by
wrong endpoint type.

[    3.295630] usb 1-1: BOGUS urb xfer, pipe 3 != type 1
[    3.295916] WARNING: CPU: 0 PID: 33 at drivers/usb/core/urb.c:503 usb_submit_urb+0xcd9/0x18b0
[    3.298155] RIP: 0010:usb_submit_urb+0xcd9/0x18b0
[    3.302451] Call Trace:
[    3.302580]  <TASK>
[    3.302698]  bfusb_rx_submit+0x24e/0x390 [bfusb]
[    3.302938]  bfusb_open+0x50/0x90 [bfusb]

Fix this by checking the endpoint type at first.

Signed-off-by: Zheyu Ma <zheyuma97@...il.com>
---
 drivers/bluetooth/bfusb.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/bfusb.c b/drivers/bluetooth/bfusb.c
index cab93935cc7f..447b6876c552 100644
--- a/drivers/bluetooth/bfusb.c
+++ b/drivers/bluetooth/bfusb.c
@@ -613,7 +613,9 @@ static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *i
 	bulk_out_ep = &intf->cur_altsetting->endpoint[0];
 	bulk_in_ep  = &intf->cur_altsetting->endpoint[1];
 
-	if (!bulk_out_ep || !bulk_in_ep) {
+	if (!bulk_out_ep || !bulk_in_ep ||
+		!usb_endpoint_is_bulk_out(&bulk_out_ep->desc) ||
+		!usb_endpoint_is_bulk_in(&bulk_in_ep->desc)) {
 		BT_ERR("Bulk endpoints not found");
 		goto done;
 	}
-- 
2.25.1