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drm/exynos: g2d: fix null pointer dereference

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This patch fixes a null pointer dereference issue incurred by
calling g2d_remove when exynos_drm_platform_probe is failed.

cmdlist_pool of g2d is allocated when g2d sub driver is probed.
So if exynos_drm_platform_probe is failed, the g2d sub driver is
not probed and the cmdlist_pool is still NULL.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Inki Dae 2014-11-07 20:31:08 +09:00
parent f7c2f36f43
commit 9ad703e943
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/exynos/exynos_drm_g2d.c
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@ -302,9 +302,12 @@ static void g2d_fini_cmdlist(struct g2d_data *g2d)
struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
kfree(g2d->cmdlist_node);
dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
g2d->cmdlist_pool_virt,
g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
if (g2d->cmdlist_pool_virt && g2d->cmdlist_pool) {
dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
g2d->cmdlist_pool_virt,
g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
}
}
static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)