drm/qxl: fix smatch warnings

drivers/gpu/drm/qxl/qxl_display.c:99 qxl_alloc_client_monitors_config() error: dereferencing freed memory 'qdev->client_monitors_config'
drivers/gpu/drm/qxl/qxl_object.c:66 qxl_ttm_placement_from_domain() warn: bitwise AND condition is false here
drivers/gpu/drm/qxl/qxl_ioctl.c:353 qxl_clientcap_ioctl() warn: buffer overflow 'qdev->rom->client_capabilities' 58 <= 58

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index 567a5328cfc4..fcfd4436ceed 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -84,6 +84,7 @@ void qxl_alloc_client_monitors_config(struct qxl_device *qdev, unsigned count)
         if (qdev->client_monitors_config &&
             count > qdev->client_monitors_config->count) {
                 kfree(qdev->client_monitors_config);
+                qdev->client_monitors_config = NULL;
         }
         if (!qdev->client_monitors_config) {
                 qdev->client_monitors_config = kzalloc(