From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
To: intel-wired-lan@osuosl.org
Subject: [Intel-wired-lan] [net-intel-i40e] question about assignment overwrite
Date: Wed, 07 Jun 2017 13:34:59 -0700 [thread overview]
Message-ID: <1496867699.2192.2.camel@intel.com> (raw)
In-Reply-To: <20170607195526.GA26867@korriban>
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.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: This is a digitally signed message part
URL: <http://lists.osuosl.org/pipermail/intel-wired-lan/attachments/20170607/9080abaf/attachment.asc>
WARNING: multiple messages have this Message-ID (diff)
From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
To: Mauro Rodrigues <maurosr@linux.vnet.ibm.com>
Cc: "Gustavo A. R. Silva" <garsilva@embeddedor.com>,
intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [net-intel-i40e] question about assignment overwrite
Date: Wed, 07 Jun 2017 13:34:59 -0700 [thread overview]
Message-ID: <1496867699.2192.2.camel@intel.com> (raw)
In-Reply-To: <20170607195526.GA26867@korriban>
[-- 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.
[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
next prev parent reply other threads:[~2017-06-07 20:34 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-17 20:48 [Intel-wired-lan] [net-intel-i40e] question about assignment overwrite Gustavo A. R. Silva
2017-05-17 20:48 ` Gustavo A. R. Silva
2017-05-18 5:49 ` [Intel-wired-lan] " Jeff Kirsher
2017-05-18 5:49 ` Jeff Kirsher
2017-05-18 17:44 ` [Intel-wired-lan] " Gustavo A. R. Silva
2017-05-18 17:44 ` Gustavo A. R. Silva
2017-05-18 17:44 ` Gustavo A. R. Silva
2017-06-07 19:55 ` [Intel-wired-lan] " Mauro Rodrigues
2017-06-07 19:55 ` Mauro Rodrigues
2017-06-07 20:34 ` Jeff Kirsher [this message]
2017-06-07 20:34 ` Jeff Kirsher
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1496867699.2192.2.camel@intel.com \
--to=jeffrey.t.kirsher@intel.com \
--cc=intel-wired-lan@osuosl.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.