net/i40e: fix dereference before null check

Null-checking vsi suggests that it may be null, but it
has been dereferenced before null-checking. So move the
check to before the assignment statement using the pointer.

Coverity issue: 119265, 119266
Fixes: d0a349409bd7 ("i40e: support AQ based RSS config")
Fixes: 647d1eaf758b ("i40evf: support AQ based RSS config")

Signed-off-by: Beilei Xing <beilei.xing@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 1b8cdc8..1e54dfc 100644 (file)
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -3170,13 +3170,16 @@ i40e_get_rss_lut(struct i40e_vsi *vsi, uint8_t *lut, uint16_t lut_size)
 static int
 i40e_set_rss_lut(struct i40e_vsi *vsi, uint8_t *lut, uint16_t lut_size)
 {
-       struct i40e_pf *pf = I40E_VSI_TO_PF(vsi);
-       struct i40e_hw *hw = I40E_VSI_TO_HW(vsi);
+       struct i40e_pf *pf;
+       struct i40e_hw *hw;
        int ret;
 
        if (!vsi || !lut)
                return -EINVAL;
 
+       pf = I40E_VSI_TO_PF(vsi);
+       hw = I40E_VSI_TO_HW(vsi);
+
        if (pf->flags & I40E_FLAG_RSS_AQ_CAPABLE) {
                ret = i40e_aq_set_rss_lut(hw, vsi->vsi_id, TRUE,
                                          lut, lut_size);

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 1a04c74..31547db 100644 (file)
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -2378,13 +2378,16 @@ i40evf_get_rss_lut(struct i40e_vsi *vsi, uint8_t *lut, uint16_t lut_size)
 static int
 i40evf_set_rss_lut(struct i40e_vsi *vsi, uint8_t *lut, uint16_t lut_size)
 {
-       struct i40e_vf *vf = I40E_VSI_TO_VF(vsi);
-       struct i40e_hw *hw = I40E_VSI_TO_HW(vsi);
+       struct i40e_vf *vf;
+       struct i40e_hw *hw;
        int ret;
 
        if (!vsi || !lut)
                return -EINVAL;
 
+       vf = I40E_VSI_TO_VF(vsi);
+       hw = I40E_VSI_TO_HW(vsi);
+
        if (vf->flags & I40E_FLAG_RSS_AQ_CAPABLE) {
                ret = i40e_aq_set_rss_lut(hw, vsi->vsi_id, FALSE,
                                          lut, lut_size);