[PATCH] Bluetooth: hci_mrvl: Fix wrong return value check of wait_on_bit_timeout()

[Gongwei Li]

From: Gongwei Li <ligongwei@xxxxxxxxxx>

wait_on_bit_timeout() returns 0 if the bit was cleared, -EINTR if the
process received a signal and the mode permitted wake up on that signal,
or -EAGAIN if the timeout elapsed.  It never returns 1.

Hence the check "err == 1" in mrvl_load_firmware() is dead code: when
the waiting task is interrupted by a signal (-EINTR), the code falls
into the "else if (err)" branch and misreports it as "Firmware request
timeout" with -ETIMEDOUT instead of propagating -EINTR.

Fix this by testing for -EINTR so that an interrupted firmware load is
properly detected and reported.

Fixes: 162f812f23ba ("Bluetooth: hci_uart: Add Marvell support")
Signed-off-by: Gongwei Li <ligongwei@xxxxxxxxxx>
---
 drivers/bluetooth/hci_mrvl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/bluetooth/hci_mrvl.c b/drivers/bluetooth/hci_mrvl.c
index 516b8f74c434..52badd1fe81a 100644
--- a/drivers/bluetooth/hci_mrvl.c
+++ b/drivers/bluetooth/hci_mrvl.c
@@ -307,7 +307,7 @@ static int mrvl_load_firmware(struct hci_dev *hdev, const char *name)
 		err = wait_on_bit_timeout(&mrvl->flags, STATE_FW_REQ_PENDING,
 					  TASK_INTERRUPTIBLE,
 					  msecs_to_jiffies(2000));
-		if (err == 1) {
+		if (err == -EINTR) {
 			bt_dev_err(hdev, "Firmware load interrupted");
 			err = -EINTR;
 			break;
-- 
2.25.1