soc: ti: k3-navss-ringacc: NULL check before dereference

Move the first dereference of ring to after the NULL check has occurred.
This will prevent any possible dereference of NULL.

This issue was found by Smatch.

Signed-off-by: Andrew Goodbody <andrew.goodbody@linaro.org>

diff --git a/drivers/soc/ti/k3-navss-ringacc.c b/drivers/soc/ti/k3-navss-ringacc.c
index 14114a65830f6af5fc2abdb891b084d1e04d79d2..ac29158d489020ab253a035dc76cf21bca3c2230 100644 (file)
--- a/drivers/soc/ti/k3-navss-ringacc.c
+++ b/drivers/soc/ti/k3-navss-ringacc.c
@@ -632,12 +632,14 @@ err_free_ops:
 int k3_nav_ringacc_ring_cfg(struct k3_nav_ring *ring,
                            struct k3_nav_ring_cfg *cfg)
 {
-       struct k3_nav_ringacc *ringacc = ring->parent;
+       struct k3_nav_ringacc *ringacc;
        int ret = 0;
 
        if (!ring || !cfg)
                return -EINVAL;
 
+       ringacc = ring->parent;
+
        if (ringacc->dual_ring)
                return k3_dmaring_ring_cfg(ring, cfg);