* [net-intel-i40e] question about assignment overwrite
@ 2017-05-17 20:48 Gustavo A. R. Silva
2017-05-18 5:49 ` Jeff Kirsher
0 siblings, 1 reply; 5+ messages in thread
From: Gustavo A. R. Silva @ 2017-05-17 20:48 UTC (permalink / raw)
To: Jeff Kirsher; +Cc: intel-wired-lan, netdev, linux-kernel
Hello everybody,
While looking into Coverity ID 1408956 I ran into the following piece
of code at drivers/net/ethernet/intel/i40e/i40e_main.c:8807:
8807 if (pf->hw.mac.type == I40E_MAC_X722) {
8808 pf->flags |= I40E_FLAG_RSS_AQ_CAPABLE
8809 | I40E_FLAG_128_QP_RSS_CAPABLE
8810 | I40E_FLAG_HW_ATR_EVICT_CAPABLE
8811 | I40E_FLAG_OUTER_UDP_CSUM_CAPABLE
8812 | I40E_FLAG_WB_ON_ITR_CAPABLE
8813 | I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE
8814 | I40E_FLAG_NO_PCI_LINK_CHECK
8815 | I40E_FLAG_USE_SET_LLDP_MIB
8816 | I40E_FLAG_GENEVE_OFFLOAD_CAPABLE
8817 | I40E_FLAG_PTP_L4_CAPABLE
8818 | I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE;
8819 } else if ((pf->hw.aq.api_maj_ver > 1) ||
8820 ((pf->hw.aq.api_maj_ver == 1) &&
8821 (pf->hw.aq.api_min_ver > 4))) {
8822 /* Supported in FW API version higher than 1.4 */
8823 pf->flags |= I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
8824 pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
8825 } else {
8826 pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
8827 }
The issue here is that the assignment at line 8823 is overwritten by
the code at line 8824.
I'm suspicious that line 8824 should be remove and a patch like the
following can be applied:
index d5c9c9e..48ffa73 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -8821,7 +8821,6 @@ static int i40e_sw_init(struct i40e_pf *pf)
(pf->hw.aq.api_min_ver > 4))) {
/* Supported in FW API version higher than 1.4 */
pf->flags |= I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
- pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
} else {
pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
}
What do you think?
Thanks!
--
Gustavo A. R. Silva
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [net-intel-i40e] question about assignment overwrite
2017-05-17 20:48 [net-intel-i40e] question about assignment overwrite Gustavo A. R. Silva
@ 2017-05-18 5:49 ` Jeff Kirsher
2017-05-18 17:44 ` Gustavo A. R. Silva
2017-06-07 19:55 ` Mauro Rodrigues
0 siblings, 2 replies; 5+ messages in thread
From: Jeff Kirsher @ 2017-05-18 5:49 UTC (permalink / raw)
To: Gustavo A. R. Silva; +Cc: intel-wired-lan, netdev, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 2862 bytes --]
On Wed, 2017-05-17 at 15:48 -0500, Gustavo A. R. Silva wrote:
> While looking into Coverity ID 1408956 I ran into the following
> piece
> of code at drivers/net/ethernet/intel/i40e/i40e_main.c:8807:
>
> 8807 if (pf->hw.mac.type == I40E_MAC_X722) {
> 8808 pf->flags |= I40E_FLAG_RSS_AQ_CAPABLE
> 8809 | I40E_FLAG_128_QP_RSS_CAPABLE
> 8810 | I40E_FLAG_HW_ATR_EVICT_CAPABLE
> 8811 | I40E_FLAG_OUTER_UDP_CSUM_CAPABLE
> 8812 | I40E_FLAG_WB_ON_ITR_CAPABLE
> 8813 |
> I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE
> 8814 | I40E_FLAG_NO_PCI_LINK_CHECK
> 8815 | I40E_FLAG_USE_SET_LLDP_MIB
> 8816 | I40E_FLAG_GENEVE_OFFLOAD_CAPABLE
> 8817 | I40E_FLAG_PTP_L4_CAPABLE
> 8818 | I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE;
> 8819 } else if ((pf->hw.aq.api_maj_ver > 1) ||
> 8820 ((pf->hw.aq.api_maj_ver == 1) &&
> 8821 (pf->hw.aq.api_min_ver > 4))) {
> 8822 /* Supported in FW API version higher than 1.4 */
> 8823 pf->flags |= I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
> 8824 pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> 8825 } else {
> 8826 pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> 8827 }
>
> The issue here is that the assignment at line 8823 is overwritten
> by
> the code at line 8824.
>
> I'm suspicious that line 8824 should be remove and a patch like the
> following can be applied:
>
> index d5c9c9e..48ffa73 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> @@ -8821,7 +8821,6 @@ static int i40e_sw_init(struct i40e_pf *pf)
> (pf->hw.aq.api_min_ver > 4))) {
> /* Supported in FW API version higher than 1.4 */
> pf->flags |= I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
> - pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> } else {
> pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> }
>
> What do you think?
This issue is already fixed in my dev-queue branch on my next-queue
tree.
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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [net-intel-i40e] question about assignment overwrite
2017-05-18 5:49 ` Jeff Kirsher
@ 2017-05-18 17:44 ` Gustavo A. R. Silva
2017-06-07 19:55 ` Mauro Rodrigues
1 sibling, 0 replies; 5+ messages in thread
From: Gustavo A. R. Silva @ 2017-05-18 17:44 UTC (permalink / raw)
To: Jeff Kirsher; +Cc: intel-wired-lan, netdev, linux-kernel
Hi Jeff,
Quoting Jeff Kirsher <jeffrey.t.kirsher@intel.com>:
> On Wed, 2017-05-17 at 15:48 -0500, Gustavo A. R. Silva wrote:
>> While looking into Coverity ID 1408956 I ran into the following
>> piece
>> of code at drivers/net/ethernet/intel/i40e/i40e_main.c:8807:
>>
>> 8807 if (pf->hw.mac.type == I40E_MAC_X722) {
>> 8808 pf->flags |= I40E_FLAG_RSS_AQ_CAPABLE
>> 8809 | I40E_FLAG_128_QP_RSS_CAPABLE
>> 8810 | I40E_FLAG_HW_ATR_EVICT_CAPABLE
>> 8811 | I40E_FLAG_OUTER_UDP_CSUM_CAPABLE
>> 8812 | I40E_FLAG_WB_ON_ITR_CAPABLE
>> 8813 |
>> I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE
>> 8814 | I40E_FLAG_NO_PCI_LINK_CHECK
>> 8815 | I40E_FLAG_USE_SET_LLDP_MIB
>> 8816 | I40E_FLAG_GENEVE_OFFLOAD_CAPABLE
>> 8817 | I40E_FLAG_PTP_L4_CAPABLE
>> 8818 | I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE;
>> 8819 } else if ((pf->hw.aq.api_maj_ver > 1) ||
>> 8820 ((pf->hw.aq.api_maj_ver == 1) &&
>> 8821 (pf->hw.aq.api_min_ver > 4))) {
>> 8822 /* Supported in FW API version higher than 1.4 */
>> 8823 pf->flags |= I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
>> 8824 pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
>> 8825 } else {
>> 8826 pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
>> 8827 }
>>
>> The issue here is that the assignment at line 8823 is overwritten
>> by
>> the code at line 8824.
>>
>> I'm suspicious that line 8824 should be remove and a patch like the
>> following can be applied:
>>
>> index d5c9c9e..48ffa73 100644
>> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
>> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
>> @@ -8821,7 +8821,6 @@ static int i40e_sw_init(struct i40e_pf *pf)
>> (pf->hw.aq.api_min_ver > 4))) {
>> /* Supported in FW API version higher than 1.4 */
>> pf->flags |= I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
>> - pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
>> } else {
>> pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
>> }
>>
>> What do you think?
>
> This issue is already fixed in my dev-queue branch on my next-queue
> tree.
Great, it's good to know.
Thanks!
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [net-intel-i40e] question about assignment overwrite
2017-05-18 5:49 ` Jeff Kirsher
2017-05-18 17:44 ` Gustavo A. R. Silva
@ 2017-06-07 19:55 ` Mauro Rodrigues
2017-06-07 20:34 ` Jeff Kirsher
1 sibling, 1 reply; 5+ messages in thread
From: Mauro Rodrigues @ 2017-06-07 19:55 UTC (permalink / raw)
To: Jeff Kirsher; +Cc: Gustavo A. R. Silva, intel-wired-lan, netdev, linux-kernel
On Wed, May 17, 2017 at 10:49:11PM -0700, Jeff Kirsher wrote:
> On Wed, 2017-05-17 at 15:48 -0500, Gustavo A. R. Silva wrote:
> > While looking into Coverity ID 1408956 I ran into the following
> > piece
> > of code at drivers/net/ethernet/intel/i40e/i40e_main.c:8807:
> >
> > 8807 if (pf->hw.mac.type == I40E_MAC_X722) {
> > 8808 pf->flags |= I40E_FLAG_RSS_AQ_CAPABLE
> > 8809 | I40E_FLAG_128_QP_RSS_CAPABLE
> > 8810 | I40E_FLAG_HW_ATR_EVICT_CAPABLE
> > 8811 | I40E_FLAG_OUTER_UDP_CSUM_CAPABLE
> > 8812 | I40E_FLAG_WB_ON_ITR_CAPABLE
> > 8813 |
> > I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE
> > 8814 | I40E_FLAG_NO_PCI_LINK_CHECK
> > 8815 | I40E_FLAG_USE_SET_LLDP_MIB
> > 8816 | I40E_FLAG_GENEVE_OFFLOAD_CAPABLE
> > 8817 | I40E_FLAG_PTP_L4_CAPABLE
> > 8818 | I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE;
> > 8819 } else if ((pf->hw.aq.api_maj_ver > 1) ||
> > 8820 ((pf->hw.aq.api_maj_ver == 1) &&
> > 8821 (pf->hw.aq.api_min_ver > 4))) {
> > 8822 /* Supported in FW API version higher than 1.4 */
> > 8823 pf->flags |= I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
> > 8824 pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> > 8825 } else {
> > 8826 pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> > 8827 }
> >
> > The issue here is that the assignment at line 8823 is overwritten
> > by
> > the code at line 8824.
> >
> > I'm suspicious that line 8824 should be remove and a patch like the
> > following can be applied:
> >
> > index d5c9c9e..48ffa73 100644
> > --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > @@ -8821,7 +8821,6 @@ static int i40e_sw_init(struct i40e_pf *pf)
> > (pf->hw.aq.api_min_ver > 4))) {
> > /* Supported in FW API version higher than 1.4 */
> > pf->flags |= I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
> > - pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> > } else {
> > pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> > }
> >
> > What do you think?
>
> This issue is already fixed in my dev-queue branch on my next-queue
> tree.
Hi Jeff, are you planning to push this fix into net branch anytime soon?
Thanks,
Mauro
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [net-intel-i40e] question about assignment overwrite
2017-06-07 19:55 ` Mauro Rodrigues
@ 2017-06-07 20:34 ` Jeff Kirsher
0 siblings, 0 replies; 5+ messages in thread
From: Jeff Kirsher @ 2017-06-07 20:34 UTC (permalink / raw)
To: Mauro Rodrigues
Cc: Gustavo A. R. Silva, intel-wired-lan, netdev, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 3367 bytes --]
On Wed, 2017-06-07 at 16:55 -0300, Mauro Rodrigues wrote:
> On Wed, May 17, 2017 at 10:49:11PM -0700, Jeff Kirsher wrote:
> > On Wed, 2017-05-17 at 15:48 -0500, Gustavo A. R. Silva wrote:
> > > While looking into Coverity ID 1408956 I ran into the following
> > > piece
> > > of code at drivers/net/ethernet/intel/i40e/i40e_main.c:8807:
> > >
> > > 8807 if (pf->hw.mac.type == I40E_MAC_X722) {
> > > 8808 pf->flags |= I40E_FLAG_RSS_AQ_CAPABLE
> > > 8809 | I40E_FLAG_128_QP_RSS_CAPABLE
> > > 8810 | I40E_FLAG_HW_ATR_EVICT_CAPABLE
> > > 8811 | I40E_FLAG_OUTER_UDP_CSUM_CAPABLE
> > > 8812 | I40E_FLAG_WB_ON_ITR_CAPABLE
> > > 8813 |
> > > I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE
> > > 8814 | I40E_FLAG_NO_PCI_LINK_CHECK
> > > 8815 | I40E_FLAG_USE_SET_LLDP_MIB
> > > 8816 | I40E_FLAG_GENEVE_OFFLOAD_CAPABLE
> > > 8817 | I40E_FLAG_PTP_L4_CAPABLE
> > > 8818 | I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE;
> > > 8819 } else if ((pf->hw.aq.api_maj_ver > 1) ||
> > > 8820 ((pf->hw.aq.api_maj_ver == 1) &&
> > > 8821 (pf->hw.aq.api_min_ver > 4))) {
> > > 8822 /* Supported in FW API version higher than 1.4 */
> > > 8823 pf->flags |= I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
> > > 8824 pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> > > 8825 } else {
> > > 8826 pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> > > 8827 }
> > >
> > > The issue here is that the assignment at line 8823 is overwritten
> > > by
> > > the code at line 8824.
> > >
> > > I'm suspicious that line 8824 should be remove and a patch like the
> > > following can be applied:
> > >
> > > index d5c9c9e..48ffa73 100644
> > > --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > @@ -8821,7 +8821,6 @@ static int i40e_sw_init(struct i40e_pf *pf)
> > > (pf->hw.aq.api_min_ver > 4))) {
> > > /* Supported in FW API version higher than 1.4 */
> > > pf->flags |= I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
> > > - pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> > > } else {
> > > pf->flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
> > > }
> > >
> > > What do you think?
> >
> > This issue is already fixed in my dev-queue branch on my next-queue
> > tree.
>
> Hi Jeff, are you planning to push this fix into net branch anytime soon?
>
> Thanks,
>
> Mauro
The patch that fixed this issue is already in David Miller's net-next tree.
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^ permalink raw reply [flat|nested] 5+ messages in thread
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2017-05-17 20:48 [net-intel-i40e] question about assignment overwrite Gustavo A. R. Silva
2017-05-18 5:49 ` Jeff Kirsher
2017-05-18 17:44 ` Gustavo A. R. Silva
2017-06-07 19:55 ` Mauro Rodrigues
2017-06-07 20:34 ` Jeff Kirsher
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