From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Wed, 16 Dec 2015 00:27:26 +0000 (-0800)
Subject: Drivers: hv: utils: fix hvt_op_poll() return value on transport destroy
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=77b744a598d604de49df79cf161bbd1809a6948a;p=linux-beck.git

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

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

Reported-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/hv/hv_utils_transport.c b/drivers/hv/hv_utils_transport.c
index ee20b5074238..4f42c0e20c20 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;