[Intel-wired-lan] [PATCH] net-i40e: Replace variable initialisations by assignments in i40e_vc_get_vf_resources_msg()

[Intel-wired-lan] [PATCH] net-i40e: Replace variable initialisations by assignments in i40e_vc_get_vf_resources_msg()

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Fri, 1 Jan 2016 15:11:09 +0100

Replace explicit initialisations for four local variables at the beginning
by assignments that will only be performed if the corresponding code
will really be executed.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index aa58a49..e0874f5 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1172,16 +1172,18 @@ static int i40e_vc_get_version_msg(struct i40e_vf *vf, u8 *msg)
  **/
 static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
 {
-	struct i40e_virtchnl_vf_resource *vfres = NULL;
-	struct i40e_pf *pf = vf->pf;
-	i40e_status aq_ret = 0;
+	struct i40e_virtchnl_vf_resource *vfres;
+	struct i40e_pf *pf;
+	i40e_status aq_ret;
 	struct i40e_vsi *vsi;
-	int i = 0, len = 0;
+	int i = 0;
 	int num_vsis = 1;
-	int ret;
+	int len, ret;
 
 	if (!test_bit(I40E_VF_STAT_INIT, &vf->vf_states)) {
 		aq_ret = I40E_ERR_PARAM;
+		vfres = NULL;
+		len = 0;
 		goto err;
 	}
 
@@ -1202,6 +1204,7 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
 				  I40E_VIRTCHNL_VF_OFFLOAD_VLAN;
 
 	vfres->vf_offload_flags = I40E_VIRTCHNL_VF_OFFLOAD_L2;
+	pf = vf->pf;
 	vsi = pf->vsi[vf->lan_vsi_idx];
 	if (!vsi->info.pvid)
 		vfres->vf_offload_flags |= I40E_VIRTCHNL_VF_OFFLOAD_VLAN;
@@ -1231,7 +1234,7 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
 		i++;
 	}
 	set_bit(I40E_VF_STAT_ACTIVE, &vf->vf_states);
-
+	aq_ret = 0;
 err:
 	/* send the response back to the VF */
 	ret = i40e_vc_send_msg_to_vf(vf, I40E_VIRTCHNL_OP_GET_VF_RESOURCES,
-- 
2.6.3

[Intel-wired-lan] net-i40e: Reconsider further usage of variable "i" in i40e_vc_get_vf_resources_msg()

[SF Markus Elfring]

Hello,

I have taken another look at the implementation of the
function "i40e_vc_get_vf_resources_msg". I find the use of the variable "i"
strange there. It seems that the value from the increment operation in an
if branch is not reused so far.

I would appreciate a further clarification.
Can this variable be eventually deleted?

Regards,
Markus

[Intel-wired-lan] [PATCH] net-i40e: Replace variable initialisations by assignments in i40e_vc_get_vf_resources_msg()

[Nelson, Shannon]

> From: SF Markus Elfring [mailto:elfring at users.sourceforge.net]
> Sent: Friday, January 01, 2016 6:33 AM
> 
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Fri, 1 Jan 2016 15:11:09 +0100
> 
> Replace explicit initialisations for four local variables at the beginning
> by assignments that will only be performed if the corresponding code
> will really be executed.
> 
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---

This seems to me to be unnecessary fussing with the code.

sln

[Intel-wired-lan] [PATCH] net-i40e: Replace variable initialisations by assignments in i40e_vc_get_vf_resources_msg()

[Jeff Kirsher]

On Fri, 2016-01-01 at 15:32 +0100, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Fri, 1 Jan 2016 15:11:09 +0100
> 
> Replace explicit initialisations for four local variables at the
> beginning
> by assignments that will only be performed if the corresponding code
> will really be executed.
> 
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---
> ?drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 15 +++++++++---
> ---
> ?1 file changed, 9 insertions(+), 6 deletions(-)

Dropping this patch based on feedback from Shannon.
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[Intel-wired-lan] net-i40e: Reconsider further usage of variable "i" in i40e_vc_get_vf_resources_msg()

[Nelson, Shannon]

> From: SF Markus Elfring [mailto:elfring at users.sourceforge.net]
> 
> Hello,
> 
> I have taken another look at the implementation of the
> function "i40e_vc_get_vf_resources_msg". I find the use of the variable
> "i"
> strange there. It seems that the value from the increment operation in
> an
> if branch is not reused so far.
> 
> I would appreciate a further clarification.
> Can this variable be eventually deleted?

Thanks for pointing this out.  We've got an internal patch coming that will address this.

Cheers,
sln