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USB: gadgetfs: protect ep_release with lock

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This patch adds mutex protection to ep_release.

Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Milan Svoboda
2006-06-26 07:48:00 -07:00
committed by Greg Kroah-Hartman
parent 8a7471aba1
commit ba307f5828
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/gadget/inode.c
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@@ -477,6 +477,10 @@ static int
ep_release (struct inode *inode, struct file *fd) ep_release (struct inode *inode, struct file *fd)
{ {
struct ep_data *data = fd->private_data; struct ep_data *data = fd->private_data;
int value;
if ((value = down_interruptible(&data->lock)) < 0)
return value;
/* clean up if this can be reopened */ /* clean up if this can be reopened */
if (data->state != STATE_EP_UNBOUND) { if (data->state != STATE_EP_UNBOUND) {
@@ -485,6 +489,7 @@ ep_release (struct inode *inode, struct file *fd)
data->hs_desc.bDescriptorType = 0; data->hs_desc.bDescriptorType = 0;
usb_ep_disable(data->ep); usb_ep_disable(data->ep);
} }
up (&data->lock);
put_ep (data); put_ep (data);
return 0; return 0;
} }