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| author | Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> | 2017-10-07 15:19:51 -0700 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2017-10-23 20:17:49 +0300 |
| commit | e3075fd6f80c9a6ce678fa2f5bbdb2824c506c6c (patch) | |
| tree | efd5fbce592a23485de2f9e8888915dd6fb53175 /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | a5e50220edbdd1ec8912c191a0f5272d629743bf (diff) | |
platform/x86: intel_pmc_ipc: Use spin_lock to protect GCR updates
Currently, update_no_reboot_bit() function implemented in this driver
uses mutex_lock() to protect its register updates. But this function is
called with in atomic context in iTCO_wdt_start() and iTCO_wdt_stop()
functions in iTCO_wdt.c driver, which in turn causes "sleeping into
atomic context" issue. This patch fixes this issue by replacing the
mutex_lock() with spin_lock() to protect the GCR read/write/update APIs.
Fixes: 9d855d4 ("platform/x86: intel_pmc_ipc: Fix iTCO_wdt GCS memory mapping failure")
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kupuswamy@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions