USB: gadgetfs: protect ep_release with lock
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>
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@ -477,6 +477,10 @@ static int
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ep_release (struct inode *inode, struct file *fd)
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{
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struct ep_data *data = fd->private_data;
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int value;
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if ((value = down_interruptible(&data->lock)) < 0)
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return value;
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/* clean up if this can be reopened */
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if (data->state != STATE_EP_UNBOUND) {
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@ -485,6 +489,7 @@ ep_release (struct inode *inode, struct file *fd)
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data->hs_desc.bDescriptorType = 0;
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usb_ep_disable(data->ep);
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}
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up (&data->lock);
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put_ep (data);
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return 0;
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}
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