From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Get an additional reference otherwise a crash is observed when hv_utils module is being unloaded while
fcopy daemon is still running. .owner gives us an additional reference when
someone holds a descriptor for the device.
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Tested-by: Alex Ng <alexng@xxxxxxxxxxxxx>
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
---
drivers/hv/hv_fcopy.c | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/hv/hv_fcopy.c b/drivers/hv/hv_fcopy.c
index a501301..d1475e6 100644
--- a/drivers/hv/hv_fcopy.c
+++ b/drivers/hv/hv_fcopy.c
@@ -360,12 +360,9 @@ static int fcopy_open(struct inode *inode, struct file *f)
}
/* XXX: there are still some tricky corner cases, e.g.,
- * 1) In a SMP guest, when fcopy_release() runs between
+ * In an SMP guest, when fcopy_release() runs between
* schedule_delayed_work() and fcopy_send_data(), there is
* still a chance an obsolete message will be queued.
- *
- * 2) When the fcopy daemon is running, if we unload the driver,
- * we'll notice a kernel oops when we kill the daemon later.
*/
static int fcopy_release(struct inode *inode, struct file *f)
{
@@ -385,6 +382,7 @@ static int fcopy_release(struct inode *inode, struct file *f)
static const struct file_operations fcopy_fops = {
+ .owner = THIS_MODULE,
.read = fcopy_read,
.write = fcopy_write,
.release = fcopy_release,
--
1.7.4.1
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