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net/fm10k/base: update comment regarding reserved bits check

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The original comment may be read incorrectly as referring to checking
the *entire* length is zero. However, it merely checks only the reserved
bits of both length and reserved in a small amount of code. Update the
comment to indicate this is a clever trick and clearly spell out that it
only checks the reserve bits.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
This commit is contained in:
Qi Zhang 2017-03-08 01:18:57 -05:00 committed by Ferruh Yigit
parent 99cb088c1e
commit c631e94842
1 changed files with 1 additions and 1 deletions
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drivers/net/fm10k/base/fm10k_vf.c
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@ -225,7 +225,7 @@ STATIC s32 fm10k_update_vlan_vf(struct fm10k_hw *hw, u32 vid, u8 vsi, bool set)
if (vsi)
return FM10K_ERR_PARAM;
/* verify upper 4 bits of vid and length are 0 */
/* clever trick to verify reserved bits in both vid and length */
if ((vid << 16 | vid) >> 28)
return FM10K_ERR_PARAM;