[PATCH v2] drm/amdkfd: use time_is_before_jiffies(a + b) to replace "jiffies - a > b"

[Yu Zhe]

time_is_before_jiffies deals with timer wrapping correctly.

Signed-off-by: Yu Zhe <yu...@nfschina.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c
index a9466d154395..34772fe74296 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c
@@ -146,7 +146,7 @@ static void interrupt_wq(struct work_struct *work)
        struct kfd_dev *dev = container_of(work, struct kfd_dev,
                                                interrupt_work);
        uint32_t ih_ring_entry[KFD_MAX_RING_ENTRY_SIZE];
-       long start_jiffies = jiffies;
+       unsigned long start_jiffies = jiffies;
 
        if (dev->device_info.ih_ring_entry_size > sizeof(ih_ring_entry)) {
                dev_err_once(dev->adev->dev, "Ring entry too small\n");
@@ -156,7 +156,7 @@ static void interrupt_wq(struct work_struct *work)
        while (dequeue_ih_ring_entry(dev, ih_ring_entry)) {
                dev->device_info.event_interrupt_class->interrupt_wq(dev,
                                                                ih_ring_entry);
-               if (jiffies - start_jiffies > HZ) {
+               if (time_is_before_jiffies(start_jiffies + HZ)) {
                        /* If we spent more than a second processing signals,
                         * reschedule the worker to avoid soft-lockup warnings
                         */
-- 
2.11.0