diff options
| author | Sara Sharon <sara.sharon@intel.com> | 2016-06-09 17:19:35 +0300 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2016-07-06 09:40:33 +0300 |
| commit | d5d0689aefc59c6a5352ca25d7e6d47d03f543ce (patch) | |
| tree | 184846293e4c60361b7ac278db44665957ee8a9b /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 54f315cb082bf98290575e858d1e0274bb0eebe0 (diff) | |
iwlwifi: pcie: fix access to scratch buffer
This fixes a pretty ancient bug that hasn't manifested itself
until now.
The scratchbuf for command queue is allocated only for 32 slots
but is accessed with the queue write pointer - which can be
up to 256.
Since the scratch buf size was 16 and there are up to 256 TFDs
we never passed a page boundary when accessing the scratch buffer,
but when attempting to increase the size of the scratch buffer a
panic was quick to follow when trying to access the address resulted
in a page boundary.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Fixes: 38c0f334b359 ("iwlwifi: use coherent DMA memory for command header")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions