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drm/amdkfd: fix a potential NULL pointer dereference (v2)

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[ Upstream commit 81de29d842 ]

alloc_workqueue is not checked for errors and as a result,
a potential NULL dereference could occur.

v2 (Felix Kuehling):
* Fix compile error (kfifo_free instead of fifo_free)
* Return proper error code

Signed-off-by: Allen Pais <allen.pais@oracle.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Allen Pais 2019-09-18 22:00:31 +05:30 committed by Greg Kroah-Hartman
parent f88ac13307
commit 5524867433
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c
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@ -62,6 +62,11 @@ int kfd_interrupt_init(struct kfd_dev *kfd)
}
kfd->ih_wq = alloc_workqueue("KFD IH", WQ_HIGHPRI, 1);
if (unlikely(!kfd->ih_wq)) {
kfifo_free(&kfd->ih_fifo);
dev_err(kfd_chardev(), "Failed to allocate KFD IH workqueue\n");
return -ENOMEM;
}
spin_lock_init(&kfd->interrupt_lock);
INIT_WORK(&kfd->interrupt_work, interrupt_wq);