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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2011-05-27 08:37:40 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2011-06-06 15:59:40 -0700
commit3898115896c7f18cb7009de691c43cb3d92bb82a (patch)
treebf5a5b7a6e6f47a8cc43ad2e0be39e6e07f8940e
parent7e8e62e4a5d26e4cb45f25dddd093837d75616c2 (diff)
usb-gadget: unlock data->lock mutex on error path in ep_write()
ep_write() acquires data->lock mutex in get_ready_ep() and releases it on all paths except for one: when usb_endpoint_xfer_isoc() failed. The patch adds mutex_unlock(&data->lock) at that path. It is similar to commit 00cc7a5 ("usb-gadget: unlock data->lock mutex on error path in ep_read()"), it was not fixed at that time by accident. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/usb/gadget/inode.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index a01383f..a56876a 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -431,8 +431,10 @@ ep_write (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
/* halt any endpoint by doing a "wrong direction" i/o call */
if (!usb_endpoint_dir_in(&data->desc)) {
- if (usb_endpoint_xfer_isoc(&data->desc))
+ if (usb_endpoint_xfer_isoc(&data->desc)) {
+ mutex_unlock(&data->lock);
return -EINVAL;
+ }
DBG (data->dev, "%s halt\n", data->name);
spin_lock_irq (&data->dev->lock);
if (likely (data->ep != NULL))