[PATCH] drm/i915: Explicitly cast divisor to fix Coccinelle warning

[Thorsten Blum <thorsten.blum@xxxxxxxxxx>]

As the comment explains, the if check ensures that the divisor oa_period
is a u32. Explicitly cast oa_period to u32 to remove the following
Coccinelle/coccicheck warning reported by do_div.cocci:

  WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead

Signed-off-by: Thorsten Blum <thorsten.blum@xxxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_perf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 0b1cd4c7a525..24722e758aaf 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -4103,7 +4103,7 @@ static int read_properties_unlocked(struct i915_perf *perf,
 			 */
 			if (oa_period <= NSEC_PER_SEC) {
 				u64 tmp = NSEC_PER_SEC;
-				do_div(tmp, oa_period);
+				do_div(tmp, (u32)oa_period);
 				oa_freq_hz = tmp;
 			} else
 				oa_freq_hz = 0;
-- 
2.45.2