In case that etnaviv_gem_get_pages is unable to get the required pages the object mutex needs to be unlocked. Also return NULL in this case instead of propagating the error, as callers of this function might not be prepared to handle a pointer error, but expect this call to follow the semantics of a plain vmap to return NULL in case of an error.
Signed-off-by: Lucas Stach l.stach@pengutronix.de --- drivers/gpu/drm/etnaviv/etnaviv_dump.c | 2 +- drivers/gpu/drm/etnaviv/etnaviv_gem.c | 6 ++++-- 2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_dump.c b/drivers/gpu/drm/etnaviv/etnaviv_dump.c index fd7d3e989e79..09a759e69dd2 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_dump.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_dump.c @@ -216,7 +216,7 @@ void etnaviv_core_dump(struct etnaviv_gpu *gpu) iter.hdr->iova = cpu_to_le64(vram->iova);
vaddr = etnaviv_gem_vaddr(&obj->base); - if (vaddr && !IS_ERR(vaddr)) + if (vaddr) memcpy(iter.data, vaddr, obj->base.size);
etnaviv_core_dump_header(&iter, ETDUMP_BUF_BO, iter.data + diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c index 9f77c3b94cc6..b22712fdd31e 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c @@ -361,8 +361,10 @@ void *etnaviv_gem_vaddr(struct drm_gem_object *obj) if (!etnaviv_obj->vaddr) { struct page **pages = etnaviv_gem_get_pages(etnaviv_obj);
- if (IS_ERR(pages)) - return ERR_CAST(pages); + if (IS_ERR(pages)) { + mutex_unlock(&etnaviv_obj->lock); + return NULL; + }
etnaviv_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, VM_MAP, pgprot_writecombine(PAGE_KERNEL));