diff options
| author | Dave Airlie <airlied@redhat.com> | 2009-12-01 09:13:40 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2009-12-02 11:37:16 +1000 |
| commit | 4b30b87042aa71ed8682e4df622a10456796fccd (patch) | |
| tree | e7795fabed90dbc7e2155a48c01dafb4fb1a463d /drivers/gpu/drm/radeon/radeon_clocks.c | |
| parent | 7dde8a19656ddec769b609e8b5662aa7243b8b6a (diff) | |
| download | op-kernel-dev-4b30b87042aa71ed8682e4df622a10456796fccd.zip op-kernel-dev-4b30b87042aa71ed8682e4df622a10456796fccd.tar.gz | |
drm/radeon/kms: fix divide by 0 in clocks code
If the chip isn't initialised properly this can happen.
also fix return value in combios clocks function.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_clocks.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_clocks.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_clocks.c b/drivers/gpu/drm/radeon/radeon_clocks.c index a813541..2c541e0 100644 --- a/drivers/gpu/drm/radeon/radeon_clocks.c +++ b/drivers/gpu/drm/radeon/radeon_clocks.c @@ -44,6 +44,10 @@ uint32_t radeon_legacy_get_engine_clock(struct radeon_device *rdev) ref_div = RREG32_PLL(RADEON_M_SPLL_REF_FB_DIV) & RADEON_M_SPLL_REF_DIV_MASK; + + if (ref_div == 0) + return 0; + sclk = fb_div / ref_div; post_div = RREG32_PLL(RADEON_SCLK_CNTL) & RADEON_SCLK_SRC_SEL_MASK; @@ -70,6 +74,10 @@ static uint32_t radeon_legacy_get_memory_clock(struct radeon_device *rdev) ref_div = RREG32_PLL(RADEON_M_SPLL_REF_FB_DIV) & RADEON_M_SPLL_REF_DIV_MASK; + + if (ref_div == 0) + return 0; + mclk = fb_div / ref_div; post_div = RREG32_PLL(RADEON_MCLK_CNTL) & 0x7; |
