[PATCH] Drivers: hv: utils: fix hvt_op_poll() return value on transport destroy

[Vitaly Kuznetsov]

The return type of hvt_op_poll() is unsigned int and -EBADF is
inappropriate, poll functions return POLL* statuses.

Reported-by: Dexuan Cui <decui@xxxxxxxxxxxxx>
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
- This is a follow-up to the previously sent 'Drivers: hv: utils: introduce
  HVUTIL_TRANSPORT_DESTROY mode' patch which is already in
  char-misc-testing tree (a15025660d47).
---
 drivers/hv/hv_utils_transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hv/hv_utils_transport.c b/drivers/hv/hv_utils_transport.c
index ee20b50..4f42c0e 100644
--- a/drivers/hv/hv_utils_transport.c
+++ b/drivers/hv/hv_utils_transport.c
@@ -109,7 +109,7 @@ static unsigned int hvt_op_poll(struct file *file, poll_table *wait)
 	poll_wait(file, &hvt->outmsg_q, wait);
 
 	if (hvt->mode == HVUTIL_TRANSPORT_DESTROY)
-		return -EBADF;
+		return POLLERR | POLLHUP;
 
 	if (hvt->outmsg_len > 0)
 		return POLLIN | POLLRDNORM;
-- 
2.4.3

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