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author | Bernard Blackham <b-linuxgit@largestprime.net> | 2012-09-06 20:25:04 +1000 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-06 09:31:53 -0700 |
commit | 236742de5bfd2af772004ec829518856ff12b469 (patch) | |
tree | ae05c790985a5dcfe0ebf690620c29d91c63c305 /.gitignore | |
parent | 73295fe185e58b8c0b288fee61a8a994015ab4b2 (diff) | |
download | linux-236742de5bfd2af772004ec829518856ff12b469.tar.gz |
staging: usbip: avoid deadlock in vhci_device_unlink_cleanup()
Almost all of usbip assumes that the_controller->lock is acquired before vdev->priv_lock. The exception is in vhci_device_unlink_cleanup(), where locks are acquired in the reverse order. This leads to occasional deadlocks. Fixing this is a bit fiddly, as the_controller->lock can't be held when calling usb_hcd_unlink_urb_from_ep() in the middle of the list traversal. As I can't rule out concurrent callers to this function (perhaps it is safe?), the code here becomes slightly uglier - when locks are dropped in the middle so the list may have emptied itself (not even list_for_each_entry_safe is safe here). Signed-off-by: Bernard Blackham <b-linuxgit@largestprime.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '.gitignore')
0 files changed, 0 insertions, 0 deletions