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21118e8e56
igt_mm_config() calls ilog2() on the (pseudo)random 21-bit number
s>>12. Once in 2 million seeds, this is zero and ilog2 summons
the nasal demons.
There was an attempt to handle this case with a max(), but that's
too late; ms could already be something bizarre.
Given that the low 12 bits of s and ms are always zero, it's a lot
simpler just to divide them by 4096, then everything fits into 32
bits, and we can easily generate a random number 1 <= s <= 0x1fffff.
Fixes:
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|---|---|---|
| .. | ||
| i915_active.c | ||
| i915_buddy.c | ||
| i915_gem_evict.c | ||
| i915_gem_gtt.c | ||
| i915_gem.c | ||
| i915_live_selftests.h | ||
| i915_mock_selftests.h | ||
| i915_perf_selftests.h | ||
| i915_perf.c | ||
| i915_random.c | ||
| i915_random.h | ||
| i915_request.c | ||
| i915_selftest.c | ||
| i915_sw_fence.c | ||
| i915_syncmap.c | ||
| i915_vma.c | ||
| igt_atomic.c | ||
| igt_atomic.h | ||
| igt_flush_test.c | ||
| igt_flush_test.h | ||
| igt_live_test.c | ||
| igt_live_test.h | ||
| igt_mmap.c | ||
| igt_mmap.h | ||
| igt_reset.c | ||
| igt_reset.h | ||
| igt_spinner.c | ||
| igt_spinner.h | ||
| intel_memory_region.c | ||
| intel_uncore.c | ||
| lib_sw_fence.c | ||
| lib_sw_fence.h | ||
| librapl.c | ||
| librapl.h | ||
| mock_drm.h | ||
| mock_gem_device.c | ||
| mock_gem_device.h | ||
| mock_gtt.c | ||
| mock_gtt.h | ||
| mock_region.c | ||
| mock_region.h | ||
| mock_request.c | ||
| mock_request.h | ||
| mock_uncore.c | ||
| mock_uncore.h | ||
| scatterlist.c | ||