[Intel-wired-lan] [PATCH v1 0/3] i40e: fix RSS on X722

[Intel-wired-lan] [PATCH v1 0/3] i40e: fix RSS on X722

[Jacob Keller]

The X722 device supports configuring the RSS lookup table and hash key
using the admin queue instead of using registers. However, this
functionality is broken due to a couple of missing refactors which got
lost in the mix. This patch series moves some code around and finishes
the missing refactors so that things work as expected. It resolves a
NULL pointer dereference caused by ethtool -X and fixes VMQd user
configured RSS settings.

Jacob Keller (3):
  i40e: move i40e_vsi_config_rss below i40e_get_rss_aq
  i40e: fix broken i40e_config_rss_aq function
  i40e: use configured RSS key and lookup table in i40e_vsi_config_rss

 drivers/net/ethernet/intel/i40e/i40e_main.c | 124 ++++++++++++++--------------
 1 file changed, 63 insertions(+), 61 deletions(-)

-- 
2.9.0.rc1.405.g81f467e

[Intel-wired-lan] [PATCH v1 1/3] i40e: move i40e_vsi_config_rss below i40e_get_rss_aq

[Jacob Keller]

Move this function below the two functions related to configuring RSS
via the admin queue. This helps co-locate the two functions, and made it
easier to spot a bug in the first i40e_config_rss_aq function as
compared to the i40e_get_rss_aq function.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 54 ++++++++++++++---------------
 1 file changed, 27 insertions(+), 27 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index a2340dbfe07e..d482443d01de 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -7995,33 +7995,6 @@ config_rss_aq_out:
 	return ret;
 }
 
-/**
- * i40e_vsi_config_rss - Prepare for VSI(VMDq) RSS if used
- * @vsi: VSI structure
- **/
-static int i40e_vsi_config_rss(struct i40e_vsi *vsi)
-{
-	u8 seed[I40E_HKEY_ARRAY_SIZE];
-	struct i40e_pf *pf = vsi->back;
-	u8 *lut;
-	int ret;
-
-	if (!(pf->flags & I40E_FLAG_RSS_AQ_CAPABLE))
-		return 0;
-
-	lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
-	if (!lut)
-		return -ENOMEM;
-
-	i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);
-	netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
-	vsi->rss_size = min_t(int, pf->alloc_rss_size, vsi->num_queue_pairs);
-	ret = i40e_config_rss_aq(vsi, seed, lut, vsi->rss_table_size);
-	kfree(lut);
-
-	return ret;
-}
-
 /**
  * i40e_get_rss_aq - Get RSS keys and lut by using AQ commands
  * @vsi: Pointer to vsi structure
@@ -8068,6 +8041,33 @@ static int i40e_get_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
 	return ret;
 }
 
+/**
+ * i40e_vsi_config_rss - Prepare for VSI(VMDq) RSS if used
+ * @vsi: VSI structure
+ **/
+static int i40e_vsi_config_rss(struct i40e_vsi *vsi)
+{
+	u8 seed[I40E_HKEY_ARRAY_SIZE];
+	struct i40e_pf *pf = vsi->back;
+	u8 *lut;
+	int ret;
+
+	if (!(pf->flags & I40E_FLAG_RSS_AQ_CAPABLE))
+		return 0;
+
+	lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
+	if (!lut)
+		return -ENOMEM;
+
+	i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);
+	netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
+	vsi->rss_size = min_t(int, pf->alloc_rss_size, vsi->num_queue_pairs);
+	ret = i40e_config_rss_aq(vsi, seed, lut, vsi->rss_table_size);
+	kfree(lut);
+
+	return ret;
+}
+
 /**
  * i40e_config_rss_reg - Configure RSS keys and lut by writing registers
  * @vsi: Pointer to vsi structure
-- 
2.9.0.rc1.405.g81f467e

[Intel-wired-lan] [PATCH v1 2/3] i40e: fix broken i40e_config_rss_aq function

[Jacob Keller]

X722 hardware requires using the admin queue to configure RSS. This
function was previously re-written in commit e69ff813af35 ("i40e: rework
the functions to configure RSS with similar parameters").
However, the previous refactor did not work correctly for a few reasons

(a) it does not check whether seed is NULL before using it, resulting in
a NULL pointer dereference

[  402.954721] BUG: unable to handle kernel NULL pointer dereference at           (null)
[  402.955568] IP: [<ffffffffa0090ccf>] i40e_config_rss_aq.constprop.65+0x2f/0x1c0 [i40e]
[  402.956402] PGD ad610067 PUD accc0067 PMD 0
[  402.957235] Oops: 0000 [#1] SMP
[  402.958064] Modules linked in: ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_filter ebtable_
broute bridge stp llc ebtable_nat ebtables ip6table_mangle ip6table_raw ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv
6 ip6table_security ip6table_filter ip6_tables iptable_mangle iptable_raw iptable_nat nf_conntrack_ipv4_ nf_defrag_ipv4_ nf_nat_ip
v4_ nf_nat nf_conntrack iptable_security intel_rapl i86_kg_temp_thermal coretemp kvm_intel kvm irqbypass crct10dif_clMl crc32_
pclMl ghash_clMlni_intel iTCO_wdt iTCO_vendor_support shpchp sb_edac dcdbas pcspkr joydev ipmi_devintf wmi edac_core ipmi_ssif
 acpi_ad acpi_ower_meter ipmi_si ipmi_msghandler mei_me nfsd lpc_ich mei ioatdma tpm_tis auth_rpcgss tpm nfs_acl lockd grace s
unrpc ifs nngag200 i2c_algo_bit drm_kms_helper ttm drm iigbe bnx2x i40e dca mdio ptp pps_core libcrc32c fjes crc32c_intel
[  402.965563] CPU: 22 PID: 2461 Conm: ethtool Not tainted 4.6.0-rc7_1.2-ABNidQ+ #20
[  402.966719] Hardware name: Dell Inc. PowerEdge R720/0C4Y3R, BIOS 2.5.2 01/28/2015
[  402.967862] task: ffff880219b51dc0 ti: ffff8800b3408000 task.ti: ffff8800b3408000
[  402.969046] RIP: 0010:[<ffffffffa0090ccf>]  [<ffffffffa0090ccf>] i40e_config_rss_aq.constprop.65+0x2f/0x1c0 [i40e]
[  402.970339] RSP: 0018:ffff8800b340ba90  EFLAGS: 00010246
[  402.971616] RAX: 0000000000000000 RBX: ffff88042ec14000 RCX: 0000000000000200
[  402.972961] RDX: ffff880428eb9200 RSI: 0000000000000000 RDI: ffff88042ec14000
[  402.974312] RBP: ffff8800b340baf8 R08: ffff880237ada8f0 R09: ffff880428eb9200
[  402.975709] R10: ffff880428eb9200 R11: 0000000000000000 R12: ffff88042ec2e000
[  402.977104] R13: ffff88042ec2e000 R14: ffff88042ec14000 R15: ffff88022ea00800
[  402.978541] FS:  00007f84fd054700(0000) GS:ffff880237ac0000(0000) knlGS:0000000000000000
[  402.980003] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  402.981508] CR2: 0000000000000000 CR3: 000000003289e000 CR4: 00000000000406e0
[  402.983028] Stack:
[  402.984578]  0000000002000200 0000000000000000 ffff88023ffeda68 ffff88023ffef000
[  402.986187]  0000000000000268 ffff8800b340bbf8 ffff88023ffedd80 0000000088ce4f1d
[  402.987844]  ffff88042ec14000 ffff88022ea00800 ffff88042ec2e000 ffff88042ec14000
[  402.989509] Call Trace:
[  402.991200]  [<ffffffffa009636f>] i40e_config_rss+0x11f/0x1c0 [i40e]
[  402.992924]  [<ffffffffa00a1ae0>] i40e_set_rifh+0ic0/0x130 [i40e]
[  402.994684]  [<ffffffff816d54b7>] ethtool_set_rifh+0x1f7/0x300
[  402.996446]  [<ffffffff8136d02b>] ? cred_has_capability+0io6b/0x100
[  402.998203]  [<ffffffff8136d102>] ? selinux_capable+0x12/0x20
[  402.999968]  [<ffffffff8136277b>] ? security_capable+0x4b/0x70
[  403.001707]  [<ffffffff816d6da3>] dev_ethtool+0x1423/0x2290
[  403.003461]  [<ffffffff816eab41>] dev_ioctl+0x191/0io630
[  403.005186]  [<ffffffff811cf80a>] ? lru_cache_add+0x3a/0i80
[  403.006942]  [<ffffffff817f2a8e>] ? _raw_spin_unlock+0ie/0x20
[  403.008691]  [<ffffffff816adb95>] sock_do_ioctl+0x45/0i50
[  403.010421]  [<ffffffff816ae229>] sock_ioctl+0x209/0x2d0
[  403.012173]  [<ffffffff81262194>] do_vfs_ioctl+0u4/0io6c0
[  403.013911]  [<ffffffff81262829>] SyS_ioctl+0x79/0x90
[  403.015710]  [<ffffffff817f2e72>] entry_SYSCALL_64_fastpath+0x1a/0u4
[  403.017500] Code: 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 89 fb 48 83 ec 40 4c 8b a7 e0 05 00 00 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 <48> 8b 06 41 0f b7 bc 24 f2 0f 00 00 48 89 45 9c 48 8b 46 08 48
[  403.021454] RIP  [<ffffffffa0090ccf>] i40e_config_rss_aq.constprop.65+0x2f/0x1c0 [i40e]
[  403.023395]  RSP <ffff8800b340ba90>
[  403.025271] CR2: 0000000000000000
[  403.027169] ---[ end trace 64561b528cf61cf0 ]---

(b) it does not even bother to use the passed in *lut parameter which
defines the requested lookup table. Instead it uses its own round robin
table.

Fix these issues by re-writing it to be similar to i40e_config_rss_reg
and i40e_get_rss_aq.

Fixes: e69ff813af35 ("i40e: rework the functions to configure RSS with similar parameters", 2015-10-21)
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 57 ++++++++++++-----------------
 1 file changed, 23 insertions(+), 34 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index d482443d01de..7617ee4a86b0 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -7953,45 +7953,34 @@ static int i40e_setup_misc_vector(struct i40e_pf *pf)
 static int i40e_config_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
 			      u8 *lut, u16 lut_size)
 {
-	struct i40e_aqc_get_set_rss_key_data rss_key;
 	struct i40e_pf *pf = vsi->back;
 	struct i40e_hw *hw = &pf->hw;
-	bool pf_lut = false;
-	u8 *rss_lut;
-	int ret, i;
+	int ret = 0;
 
-	memcpy(&rss_key, seed, sizeof(rss_key));
-
-	rss_lut = kzalloc(pf->rss_table_size, GFP_KERNEL);
-	if (!rss_lut)
-		return -ENOMEM;
-
-	/* Populate the LUT with max no. of queues in round robin fashion */
-	for (i = 0; i < vsi->rss_table_size; i++)
-		rss_lut[i] = i % vsi->rss_size;
-
-	ret = i40e_aq_set_rss_key(hw, vsi->id, &rss_key);
-	if (ret) {
-		dev_info(&pf->pdev->dev,
-			 "Cannot set RSS key, err %s aq_err %s\n",
-			 i40e_stat_str(&pf->hw, ret),
-			 i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
-		goto config_rss_aq_out;
+	if (seed) {
+		struct i40e_aqc_get_set_rss_key_data *seed_dw =
+			(struct i40e_aqc_get_set_rss_key_data *)seed;
+		ret = i40e_aq_set_rss_key(hw, vsi->id, seed_dw);
+		if (ret) {
+			dev_info(&pf->pdev->dev,
+				 "Cannot set RSS key, err %s aq_err %s\n",
+				 i40e_stat_str(hw, ret),
+				 i40e_aq_str(hw, hw->aq.asq_last_status));
+			return ret;
+		}
 	}
+	if (lut) {
+		bool pf_lut = vsi->type == I40E_VSI_MAIN ? true : false;
 
-	if (vsi->type == I40E_VSI_MAIN)
-		pf_lut = true;
-
-	ret = i40e_aq_set_rss_lut(hw, vsi->id, pf_lut, rss_lut,
-				  vsi->rss_table_size);
-	if (ret)
-		dev_info(&pf->pdev->dev,
-			 "Cannot set RSS lut, err %s aq_err %s\n",
-			 i40e_stat_str(&pf->hw, ret),
-			 i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
-
-config_rss_aq_out:
-	kfree(rss_lut);
+		ret = i40e_aq_set_rss_lut(hw, vsi->id, pf_lut, lut, lut_size);
+		if (ret) {
+			dev_info(&pf->pdev->dev,
+				 "Cannot set RSS lut, err %s aq_err %s\n",
+				 i40e_stat_str(hw, ret),
+				 i40e_aq_str(hw, hw->aq.asq_last_status));
+			return ret;
+		}
+	}
 	return ret;
 }
 
-- 
2.9.0.rc1.405.g81f467e

[Intel-wired-lan] [PATCH v1 3/3] i40e: use configured RSS key and lookup table in i40e_vsi_config_rss

[Jacob Keller]

A previous refactor added support to store user configuration for VSIs,
so that extra VSIs such as for VMDq can use this information when
configuring. Unfortunately the i40e_vsi_config_rss function was missed
in this refactor, and the values were being ignored. Fix this by
checking for the fields and using those instead of always using the
default values.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 7617ee4a86b0..141f2ac48fe4 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -8044,13 +8044,26 @@ static int i40e_vsi_config_rss(struct i40e_vsi *vsi)
 	if (!(pf->flags & I40E_FLAG_RSS_AQ_CAPABLE))
 		return 0;
 
+	if (!vsi->rss_size)
+		vsi->rss_size = min_t(int, pf->alloc_rss_size,
+				      vsi->num_queue_pairs);
+	if (!vsi->rss_size)
+		return -EINVAL;
+
 	lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
 	if (!lut)
 		return -ENOMEM;
-
-	i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);
-	netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
-	vsi->rss_size = min_t(int, pf->alloc_rss_size, vsi->num_queue_pairs);
+	/* Use the user configured hash keys and lookup table if there is one,
+	 * otherwise use default
+	 */
+	if (vsi->rss_lut_user)
+		memcpy(lut, vsi->rss_lut_user, vsi->rss_table_size);
+	else
+		i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);
+	if (vsi->rss_hkey_user)
+		memcpy(seed, vsi->rss_hkey_user, I40E_HKEY_ARRAY_SIZE);
+	else
+		netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
 	ret = i40e_config_rss_aq(vsi, seed, lut, vsi->rss_table_size);
 	kfree(lut);
 
-- 
2.9.0.rc1.405.g81f467e

[Intel-wired-lan] [PATCH v1 0/3] i40e: fix RSS on X722

[Keller, Jacob E]

On Tue, 2016-07-19 at 16:23 -0700, Jacob Keller wrote:
> The X722 device supports configuring the RSS lookup table and hash
> key
> using the admin queue instead of using registers. However, this
> functionality is broken due to a couple of missing refactors which
> got
> lost in the mix. This patch series moves some code around and
> finishes
> the missing refactors so that things work as expected. It resolves a
> NULL pointer dereference caused by ethtool -X and fixes VMQd user
> configured RSS settings.
> 

Jeff,

These were sent out-of-band (not in one of the regular series) because
they fix some issues with patches that did not get fully pulled in when
going upstream originally. There is no equivalent base patch for these,
as they were already sent in the past, but incorrectly missed a few key
portions of code.

Thanks,
Jake

> Jacob Keller (3):
> ? i40e: move i40e_vsi_config_rss below i40e_get_rss_aq
> ? i40e: fix broken i40e_config_rss_aq function
> ? i40e: use configured RSS key and lookup table in
> i40e_vsi_config_rss
> 
> ?drivers/net/ethernet/intel/i40e/i40e_main.c | 124 ++++++++++++++--
> ------------
> ?1 file changed, 63 insertions(+), 61 deletions(-)
> 

[Intel-wired-lan] [PATCH v1 1/3] i40e: move i40e_vsi_config_rss below i40e_get_rss_aq

[Bowers, AndrewX]

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On
> Behalf Of Jacob Keller
> Sent: Tuesday, July 19, 2016 4:23 PM
> To: Intel Wired LAN <intel-wired-lan@lists.osuosl.org>
> Subject: [Intel-wired-lan] [PATCH v1 1/3] i40e: move i40e_vsi_config_rss
> below i40e_get_rss_aq
> 
> Move this function below the two functions related to configuring RSS via the
> admin queue. This helps co-locate the two functions, and made it easier to
> spot a bug in the first i40e_config_rss_aq function as compared to the
> i40e_get_rss_aq function.
> 
> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_main.c | 54 ++++++++++++++----------
> -----
>  1 file changed, 27 insertions(+), 27 deletions(-)

Tested-by: Andrew Bowers <andrewx.bowers@intel.com>

[Intel-wired-lan] [PATCH v1 2/3] i40e: fix broken i40e_config_rss_aq function

[Bowers, AndrewX]

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On
> Behalf Of Jacob Keller
> Sent: Tuesday, July 19, 2016 4:24 PM
> To: Intel Wired LAN <intel-wired-lan@lists.osuosl.org>
> Subject: [Intel-wired-lan] [PATCH v1 2/3] i40e: fix broken i40e_config_rss_aq
> function
> 
> X722 hardware requires using the admin queue to configure RSS. This
> function was previously re-written in commit e69ff813af35 ("i40e: rework the
> functions to configure RSS with similar parameters").
> However, the previous refactor did not work correctly for a few reasons
> 
> (a) it does not check whether seed is NULL before using it, resulting in a NULL
> pointer dereference
> 
> [  402.954721] BUG: unable to handle kernel NULL pointer dereference at
> (null)
> [  402.955568] IP: [<ffffffffa0090ccf>]
> i40e_config_rss_aq.constprop.65+0x2f/0x1c0 [i40e] [  402.956402] PGD
> ad610067 PUD accc0067 PMD 0 [  402.957235] Oops: 0000 [#1] SMP [
> 402.958064] Modules linked in: ip6t_rpfilter ip6t_REJECT nf_reject_ipv6
> xt_conntrack ip_set nfnetlink ebtable_filter ebtable_ broute bridge stp llc
> ebtable_nat ebtables ip6table_mangle ip6table_raw ip6table_nat
> nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv
> 6 ip6table_security ip6table_filter ip6_tables iptable_mangle iptable_raw
> iptable_nat nf_conntrack_ipv4_ nf_defrag_ipv4_ nf_nat_ip v4_ nf_nat
> nf_conntrack iptable_security intel_rapl i86_kg_temp_thermal coretemp
> kvm_intel kvm irqbypass crct10dif_clMl crc32_ pclMl ghash_clMlni_intel
> iTCO_wdt iTCO_vendor_support shpchp sb_edac dcdbas pcspkr joydev
> ipmi_devintf wmi edac_core ipmi_ssif  acpi_ad acpi_ower_meter ipmi_si
> ipmi_msghandler mei_me nfsd lpc_ich mei ioatdma tpm_tis auth_rpcgss tpm
> nfs_acl lockd grace s unrpc ifs nngag200 i2c_algo_bit drm_kms_helper ttm
> drm iigbe bnx2x i40e dca mdio ptp pps_core libcrc32c fjes crc32c_intel [
> 402.965563] CPU: 22 PID: 2461 Conm: ethtool Not tainted 4.6.0-rc7_1.2-
> ABNidQ+ #20 [  402.966719] Hardware name: Dell Inc. PowerEdge
> R720/0C4Y3R, BIOS 2.5.2 01/28/2015 [  402.967862] task: ffff880219b51dc0 ti:
> ffff8800b3408000 task.ti: ffff8800b3408000 [  402.969046] RIP:
> 0010:[<ffffffffa0090ccf>]  [<ffffffffa0090ccf>]
> i40e_config_rss_aq.constprop.65+0x2f/0x1c0 [i40e] [  402.970339] RSP:
> 0018:ffff8800b340ba90  EFLAGS: 00010246 [  402.971616] RAX:
> 0000000000000000 RBX: ffff88042ec14000 RCX: 0000000000000200 [
> 402.972961] RDX: ffff880428eb9200 RSI: 0000000000000000 RDI:
> ffff88042ec14000 [  402.974312] RBP: ffff8800b340baf8 R08: ffff880237ada8f0
> R09: ffff880428eb9200 [  402.975709] R10: ffff880428eb9200 R11:
> 0000000000000000 R12: ffff88042ec2e000 [  402.977104] R13:
> ffff88042ec2e000 R14: ffff88042ec14000 R15: ffff88022ea00800 [  402.978541]
> FS:  00007f84fd054700(0000) GS:ffff880237ac0000(0000)
> knlGS:0000000000000000 [  402.980003] CS:  0010 DS: 0000 ES: 0000 CR0:
> 0000000080050033 [  402.981508] CR2: 0000000000000000 CR3:
> 000000003289e000 CR4: 00000000000406e0 [  402.983028] Stack:
> [  402.984578]  0000000002000200 0000000000000000 ffff88023ffeda68
> ffff88023ffef000 [  402.986187]  0000000000000268 ffff8800b340bbf8
> ffff88023ffedd80 0000000088ce4f1d [  402.987844]  ffff88042ec14000
> ffff88022ea00800 ffff88042ec2e000 ffff88042ec14000 [  402.989509] Call Trace:
> [  402.991200]  [<ffffffffa009636f>] i40e_config_rss+0x11f/0x1c0 [i40e] [
> 402.992924]  [<ffffffffa00a1ae0>] i40e_set_rifh+0ic0/0x130 [i40e] [
> 402.994684]  [<ffffffff816d54b7>] ethtool_set_rifh+0x1f7/0x300 [
> 402.996446]  [<ffffffff8136d02b>] ? cred_has_capability+0io6b/0x100 [
> 402.998203]  [<ffffffff8136d102>] ? selinux_capable+0x12/0x20 [  402.999968]
> [<ffffffff8136277b>] ? security_capable+0x4b/0x70 [  403.001707]
> [<ffffffff816d6da3>] dev_ethtool+0x1423/0x2290 [  403.003461]
> [<ffffffff816eab41>] dev_ioctl+0x191/0io630 [  403.005186]
> [<ffffffff811cf80a>] ? lru_cache_add+0x3a/0i80 [  403.006942]
> [<ffffffff817f2a8e>] ? _raw_spin_unlock+0ie/0x20 [  403.008691]
> [<ffffffff816adb95>] sock_do_ioctl+0x45/0i50 [  403.010421]
> [<ffffffff816ae229>] sock_ioctl+0x209/0x2d0 [  403.012173]
> [<ffffffff81262194>] do_vfs_ioctl+0u4/0io6c0 [  403.013911]
> [<ffffffff81262829>] SyS_ioctl+0x79/0x90 [  403.015710]  [<ffffffff817f2e72>]
> entry_SYSCALL_64_fastpath+0x1a/0u4
> [  403.017500] Code: 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 89 fb 48 83 ec
> 40 4c 8b a7 e0 05 00 00 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 <48> 8b 06
> 41 0f b7 bc 24 f2 0f 00 00 48 89 45 9c 48 8b 46 08 48 [  403.021454] RIP
> [<ffffffffa0090ccf>] i40e_config_rss_aq.constprop.65+0x2f/0x1c0 [i40e] [
> 403.023395]  RSP <ffff8800b340ba90> [  403.025271] CR2: 0000000000000000 [
> 403.027169] ---[ end trace 64561b528cf61cf0 ]---
> 
> (b) it does not even bother to use the passed in *lut parameter which
> defines the requested lookup table. Instead it uses its own round robin
> table.
> 
> Fix these issues by re-writing it to be similar to i40e_config_rss_reg and
> i40e_get_rss_aq.
> 
> Fixes: e69ff813af35 ("i40e: rework the functions to configure RSS with similar
> parameters", 2015-10-21)
> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_main.c | 57 ++++++++++++-------------
> ----
>  1 file changed, 23 insertions(+), 34 deletions(-)

Tested-by: Andrew Bowers <andrewx.bowers@intel.com>

[Intel-wired-lan] [PATCH v1 3/3] i40e: use configured RSS key and lookup table in i40e_vsi_config_rss

[Bowers, AndrewX]

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On
> Behalf Of Jacob Keller
> Sent: Tuesday, July 19, 2016 4:24 PM
> To: Intel Wired LAN <intel-wired-lan@lists.osuosl.org>
> Subject: [Intel-wired-lan] [PATCH v1 3/3] i40e: use configured RSS key and
> lookup table in i40e_vsi_config_rss
> 
> A previous refactor added support to store user configuration for VSIs, so
> that extra VSIs such as for VMDq can use this information when configuring.
> Unfortunately the i40e_vsi_config_rss function was missed in this refactor,
> and the values were being ignored. Fix this by checking for the fields and
> using those instead of always using the default values.
> 
> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_main.c | 21 +++++++++++++++++----
>  1 file changed, 17 insertions(+), 4 deletions(-)

Tested-by: Andrew Bowers <andrewx.bowers@intel.com>