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| 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 | |
| parent | 7dde8a19656ddec769b609e8b5662aa7243b8b6a (diff) | |
| download | blackbird-op-linux-4b30b87042aa71ed8682e4df622a10456796fccd.tar.gz blackbird-op-linux-4b30b87042aa71ed8682e4df622a10456796fccd.zip | |
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>
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_clocks.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_combios.c | 2 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_clocks.c b/drivers/gpu/drm/radeon/radeon_clocks.c index a81354167621..2c541e08f160 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; diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c index adc47437569e..14d3555e4afe 100644 --- a/drivers/gpu/drm/radeon/radeon_combios.c +++ b/drivers/gpu/drm/radeon/radeon_combios.c @@ -495,7 +495,7 @@ bool radeon_combios_get_clock_info(struct drm_device *dev) uint16_t sclk, mclk; if (rdev->bios == NULL) - return NULL; + return false; pll_info = combios_get_table_offset(dev, COMBIOS_PLL_INFO_TABLE); if (pll_info) { |
