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| author | Ajay Kaher <ajay.kaher@samsung.com> | 2017-03-28 08:09:32 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-20 14:26:58 +0200 |
| commit | de9d2d297ebe4d591efd41902c568e3ef4774c43 (patch) | |
| tree | 34abcd18dcb21fbd5485204ce69c17184dc0a3df /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | fcd9a083cd2283574c46b78f39f0d7a83c3cc7d6 (diff) | |
USB: Proper handling of Race Condition when two USB class drivers try to call init_usb_class simultaneously
commit 2f86a96be0ccb1302b7eee7855dbee5ce4dc5dfb upstream.
There is race condition when two USB class drivers try to call
init_usb_class at the same time and leads to crash.
code path: probe->usb_register_dev->init_usb_class
To solve this, mutex locking has been added in init_usb_class() and
destroy_usb_class().
As pointed by Alan, removed "if (usb_class)" test from destroy_usb_class()
because usb_class can never be NULL there.
Signed-off-by: Ajay Kaher <ajay.kaher@samsung.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions