lkml.org 
[lkml]   [2016]   [Feb]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] usb: gadget: gadgetfs: unregister gadget only if it got successfully registered
Date
Gadgetfs driver called usb_gadget_unregister_driver unconditionally, even
if it didn't register it earlier due to other failures. This patch fixes
this.

Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
---
drivers/usb/gadget/legacy/inode.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index 7a62a2f7bc18..cde6a2133c90 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -130,7 +130,8 @@ struct dev_data {
setup_can_stall : 1,
setup_out_ready : 1,
setup_out_error : 1,
- setup_abort : 1;
+ setup_abort : 1,
+ gadget_registered : 1;
unsigned setup_wLength;

/* the rest is basically write-once */
@@ -1179,7 +1180,8 @@ dev_release (struct inode *inode, struct file *fd)

/* closing ep0 === shutdown all */

- usb_gadget_unregister_driver (&gadgetfs_driver);
+ if (dev->gadget_registered)
+ usb_gadget_unregister_driver (&gadgetfs_driver);

/* at this point "good" hardware has disconnected the
* device from USB; the host won't see it any more.
@@ -1825,6 +1827,7 @@ dev_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
* kick in after the ep0 descriptor is closed.
*/
value = len;
+ dev->gadget_registered = true;
}
return value;

--
1.9.2
\
 
 \ /
  Last update: 2016-02-08 13:41    [W:0.164 / U:0.852 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site