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[dpdk-dev,09/17] net/fm10k/base: update comment regarding reserved bits check

Message ID 20170303031727.461-10-qi.z.zhang@intel.com (mailing list archive)
State Changes Requested, archived
Delegated to: Ferruh Yigit
Headers show

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Qi Zhang March 3, 2017, 3:17 a.m. UTC
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>
---
 drivers/net/fm10k/base/fm10k_vf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/net/fm10k/base/fm10k_vf.c b/drivers/net/fm10k/base/fm10k_vf.c
index 533dfeb..dd3d318 100644
--- a/drivers/net/fm10k/base/fm10k_vf.c
+++ b/drivers/net/fm10k/base/fm10k_vf.c
@@ -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;