msm: mdss: Add NULL pointer checks in mdss_mdp_wb_set_secure



Null pointer dereference can cause kernel panic, hence add
checks to avoid them.

CRs-Fixed: 553552
Change-Id: Ia854d7b65a5cf6a0fa214c34e658ea0f1380ac2c
Signed-off-by: Jayant Shekhar <jshekhar@codeaurora.org>

parent 14a5d3a3

drivers/video/msm/mdss/mdss_mdp_wb.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -142,6 +142,16 @@ int mdss_mdp_wb_set_secure(struct msm_fb_data_type *mfd, int enable)

		pr_debug("setting secure=%d\n", enable);

		if (!ctl \|\| !ctl->mdata) {
		pr_err("%s : ctl is NULL", __func__);
		return -EINVAL;
		}

		if (!wb) {
		pr_err("unable to start, writeback is not initialized\n");
		return -ENODEV;
		}

		ctl->is_secure = enable;
		wb->is_secure = enable;