Static checkers complain that the shifts in "(vid << 4) >> 4" perfectly
cancel each other out and the code is a no-op. "vid" is a u16. The
comment says that the intention here is to drop the upper bits so I have
added a cast to "u16" to do that.
Fixes: 401b5383c6c9 ('fm10k: Add support for configuring PF interface')
Signed-off-by: Dan Carpenter <[email protected]>
---
Static analysis. Not tested.
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
index 275423d..ee30d06 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
@@ -335,7 +335,7 @@ static s32 fm10k_update_xc_addr_pf(struct fm10k_hw *hw, u16
glort,
return FM10K_ERR_PARAM;
/* drop upper 4 bits of VLAN ID */
- vid = (vid << 4) >> 4;
+ vid = (u16)(vid << 4) >> 4;
/* record fields */
mac_update.mac_lower = cpu_to_le32(((u32)mac[2] << 24) |
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