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Date: Tue, 22 Feb 2011 14:16:48 -0800 From: Greg KH <gregkh@...e.de> To: linux-kernel@...r.kernel.org, stable@...nel.org Cc: stable-review@...nel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Alex Deucher <alexdeucher@...il.com>, Dave Airlie <airlied@...hat.com> Subject: [09/70] drm/radeon/kms: add bounds checking to avivo pll algo 2.6.37-stable review patch. If anyone has any objections, please let us know. ------------------ From: Alex Deucher <alexdeucher@...il.com> commit a4b40d5d97f5c9ad0b7f4bf2818291ca184bb433 upstream. Prevent divider overflow. Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=28932 Signed-off-by: Alex Deucher <alexdeucher@...il.com> Signed-off-by: Dave Airlie <airlied@...hat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- drivers/gpu/drm/radeon/radeon_display.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -461,6 +461,11 @@ static void avivo_get_fb_div(struct rade tmp *= target_clock; *fb_div = tmp / pll->reference_freq; *frac_fb_div = tmp % pll->reference_freq; + + if (*fb_div > pll->max_feedback_div) + *fb_div = pll->max_feedback_div; + else if (*fb_div < pll->min_feedback_div) + *fb_div = pll->min_feedback_div; } static u32 avivo_get_post_div(struct radeon_pll *pll, @@ -494,6 +499,11 @@ static u32 avivo_get_post_div(struct rad post_div--; } + if (post_div > pll->max_post_div) + post_div = pll->max_post_div; + else if (post_div < pll->min_post_div) + post_div = pll->min_post_div; + return post_div; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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