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gpu: nvgpu: prevent crash during unbind

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This change solves crashes during bind that were introduced in the driver
during the OS unification refactoring due to lack of coverage of the remove()
function.

The fixes during remove are:

(1) Prevent NULL dereference on GPUs with secure boot
(2) Prevent NULL dereferences when fecs_trace is not enabled
(3) Added PRAMIN blocker during driver removal if HW is no longer accesible
(4) Prevent double free of debugfs nodes as they are handled on the
debugfs_remove_recursive() call
(5) quiesce() can now be called without checking is HW accesible flag is set
(6) added function to free irq so no IRQ association is left on the driver after
it is removed
(7) prevent NULL dereference on nvgpu_thread_stop() if the thread is already
stopped

JIRA: EVLR-1739

Change-Id: I787d38f202d5267a6b34815f23e1bc88110e8455
Signed-off-by: David Nieto <dmartineznie@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1563005
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
David Nieto
2017-09-18 20:31:28 -07:00
committed by mobile promotions
parent f6fcecfc6f
commit 7134e9e852
12 changed files with 98 additions and 65 deletions
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6
drivers/gpu/nvgpu/common/linux/thread.c
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@@ -46,8 +46,10 @@ int nvgpu_thread_create(struct nvgpu_thread *thread,
void nvgpu_thread_stop(struct nvgpu_thread *thread)
{
kthread_stop(thread->task);
thread->task = NULL;
if (thread->task) {
kthread_stop(thread->task);
thread->task = NULL;
}
};
bool nvgpu_thread_should_stop(struct nvgpu_thread *thread)