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| author | Niklas Neronin <niklas.neronin@linux.intel.com> | 2024-06-26 15:48:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-27 16:08:06 +0200 |
| commit | 132dcf65fc2d5a308fc44833dbb7f73a211a02e9 (patch) | |
| tree | fa8553ceb9859c7f67aa4ba23236a4bada469fc6 /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py | |
| parent | 5ea8a885c85edee318c8daa8f0a5ecb5e409ecd6 (diff) | |
usb: xhci: remove infinite loop prevention
If a buggy HW reports some unpredicted event (for example, an overrun event
following a MSE event while the EP ring is actually not empty), the driver
will never find the TD, and it will loop until the TD list is empty.
Before commits [1][2], the spin lock was released when giving back a URB in
the do-while loop. This could cause more TD to be added to TD list, causing
an infinite loop.
Because of commits [1][2] the spin lock is not released any more, thus the
infinite loop prevention is unnecessary and is removed.
[1], commit 0c03d89d0c71 ("xhci: Giveback urb in finish_td directly")
[2], commit 36dc01657b49 ("usb: host: xhci: Support running urb giveback in
tasklet context")
Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20240626124835.1023046-18-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py')
0 files changed, 0 insertions, 0 deletions