Add check for valid ctx pointer and then only dereference ctx to
configure supp_nowait flag.

Fixes: 42bf4152d8a7 ("tee: add supp_nowait flag in tee_context struct")
Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Sumit Garg <sumit.g...@linaro.org>
---
 drivers/tee/tee_core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
index 25f3b9c..06fbfc0 100644
--- a/drivers/tee/tee_core.c
+++ b/drivers/tee/tee_core.c
@@ -993,7 +993,9 @@ tee_client_open_context(struct tee_context *start,
         * tee_client_open_session() if any in kernel client requires
         * different behaviour.
         */
-       ctx->supp_nowait = true;
+       if (!IS_ERR(ctx))
+               ctx->supp_nowait = true;
+
        return ctx;
 }
 EXPORT_SYMBOL_GPL(tee_client_open_context);
-- 
2.7.4

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