intel: Handle malloc fails in context create

The previous code would just use the potentially unallocated variable,
which is probably okay most of the time, but not very nice to the user
of the library.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>

diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c
index 3b1f584..ad722dd 100644 (file)
--- a/intel/intel_bufmgr_gem.c
+++ b/intel/intel_bufmgr_gem.c
@@ -3020,15 +3020,19 @@ drm_intel_gem_context_create(drm_intel_bufmgr *bufmgr)
        drm_intel_context *context = NULL;
        int ret;
 
+       context = calloc(1, sizeof(*context));
+       if (!context)
+               return NULL;
+
        VG_CLEAR(create);
        ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create);
        if (ret != 0) {
                DBG("DRM_IOCTL_I915_GEM_CONTEXT_CREATE failed: %s\n",
                    strerror(errno));
+               free(context);
                return NULL;
        }
 
-       context = calloc(1, sizeof(*context));
        context->ctx_id = create.ctx_id;
        context->bufmgr = bufmgr;