forked from luck/tmp_suning_uos_patched
drm/radeon/kms/agp The wrong AGP chipset can cause a NULL pointer dereference
Selecting the wrong or no CONFIG_AGP_* chipset can cause a NULL pointer dereference when combined with CONFIG_DRM_RADEON_KMS and an old system with a R100 AGP card (should effect other cards too). The agp field will be set to NULL if no suitable AGP chipset driver is loaded, drm_agp_acquire already preforms a suitable NULL check so it can be used directly. Signed-off-by: Robert Fitzsimons <robfitz@273k.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
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@ -134,13 +134,11 @@ int radeon_agp_init(struct radeon_device *rdev)
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int ret;
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/* Acquire AGP. */
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if (!rdev->ddev->agp->acquired) {
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ret = drm_agp_acquire(rdev->ddev);
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if (ret) {
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DRM_ERROR("Unable to acquire AGP: %d\n", ret);
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return ret;
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}
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}
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ret = drm_agp_info(rdev->ddev, &info);
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if (ret) {
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