diff options
| author | Mark Brown <broonie@kernel.org> | 2025-11-05 11:54:48 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2025-11-05 11:54:48 +0000 |
| commit | 8b6faa7fddf0ae69c5f1a9315a64edee6f022037 (patch) | |
| tree | ba4f383a94c798cfcfe6adec2438dd9221b4391e /include/linux/hung_task.h | |
| parent | ecd0de438c1f0ee86cf8f6d5047965a2a181444b (diff) | |
| parent | 380fd29d57abe6679d87ec56babe65ddc5873a37 (diff) | |
spi: tegra210-quad: Improve timeout handling under
Merge series from Vishwaroop A <va@nvidia.com>:
This patch series addresses timeout handling issues in the Tegra QSPI driver
that occur under high system load conditions. We've observed that when CPUs
are saturated (due to error injection, RAS firmware activity, or general CPU
contention), QSPI interrupt handlers can be delayed, causing spurious transfer
failures even though the hardware completed the operation successfully.
These changes have been tested in production environments under various high
load scenarios including RAS testing and CPU saturation workloads.
Diffstat (limited to 'include/linux/hung_task.h')
| -rw-r--r-- | include/linux/hung_task.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/linux/hung_task.h b/include/linux/hung_task.h index 34e615c76ca5..c4403eeb7144 100644 --- a/include/linux/hung_task.h +++ b/include/linux/hung_task.h @@ -20,6 +20,10 @@ * always zero. So we can use these bits to encode the specific blocking * type. * + * Note that on architectures where this is not guaranteed, or for any + * unaligned lock, this tracking mechanism is silently skipped for that + * lock. + * * Type encoding: * 00 - Blocked on mutex (BLOCKER_TYPE_MUTEX) * 01 - Blocked on semaphore (BLOCKER_TYPE_SEM) @@ -45,7 +49,7 @@ static inline void hung_task_set_blocker(void *lock, unsigned long type) * If the lock pointer matches the BLOCKER_TYPE_MASK, return * without writing anything. */ - if (WARN_ON_ONCE(lock_ptr & BLOCKER_TYPE_MASK)) + if (lock_ptr & BLOCKER_TYPE_MASK) return; WRITE_ONCE(current->blocker, lock_ptr | type); @@ -53,8 +57,6 @@ static inline void hung_task_set_blocker(void *lock, unsigned long type) static inline void hung_task_clear_blocker(void) { - WARN_ON_ONCE(!READ_ONCE(current->blocker)); - WRITE_ONCE(current->blocker, 0UL); } |