drm/i915: fix up a raw 64bit divide
We are seeing compilation failures on i386 in some environments due to an undefined reference as below: ERROR: "__udivdi3" [drivers/gpu/drm/i915/i915.ko] undefined! This is generated due to a raw 64 bit divide in the i915 driver. Fix up this raw divide. Signed-off-by: Andy Whitcroft <apw@canonical.com> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Eric Anholt <eric@anholt.net>
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@ -1577,7 +1577,7 @@ igdng_compute_m_n(int bytes_per_pixel, int nlanes,
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temp = (u64) DATA_N * pixel_clock;
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temp = div_u64(temp, link_clock);
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m_n->gmch_m = (temp * bytes_per_pixel) / nlanes;
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m_n->gmch_m = div_u64(temp * bytes_per_pixel, nlanes);
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m_n->gmch_n = DATA_N;
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fdi_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
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