diff mbox series

[net,1/9] octeontx2-pf: Do not modify number of rules

Message ID 1615886833-71688-2-git-send-email-hkelam@marvell.com
State Superseded
Headers show
Series [net,1/9] octeontx2-pf: Do not modify number of rules | expand

Commit Message

Hariprasad Kelam March 16, 2021, 9:27 a.m. UTC 
From: Subbaraya Sundeep <sbhatta@marvell.com>

In the ETHTOOL_GRXCLSRLALL ioctl ethtool uses
below structure to read number of rules from the driver.

    struct ethtool_rxnfc {
            __u32                           cmd;
            __u32                           flow_type;
            __u64                           data;
            struct ethtool_rx_flow_spec     fs;
            union {
                    __u32                   rule_cnt;
                    __u32                   rss_context;
            };
            __u32                           rule_locs[0];
    };

Driver must not modify rule_cnt member. But currently driver
modifies it by modifying rss_context. Hence fix it by using a
local variable.

Fixes: 81a43620("octeontx2-pf: Add RSS multi group support")
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
---
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Comments

Jakub Kicinski March 16, 2021, 5:02 p.m. UTC | #1 
On Tue, 16 Mar 2021 14:57:05 +0530 Hariprasad Kelam wrote:
> From: Subbaraya Sundeep <sbhatta@marvell.com>
> 
> In the ETHTOOL_GRXCLSRLALL ioctl ethtool uses
> below structure to read number of rules from the driver.
> 
>     struct ethtool_rxnfc {
>             __u32                           cmd;
>             __u32                           flow_type;
>             __u64                           data;
>             struct ethtool_rx_flow_spec     fs;
>             union {
>                     __u32                   rule_cnt;
>                     __u32                   rss_context;
>             };
>             __u32                           rule_locs[0];
>     };
> 
> Driver must not modify rule_cnt member. But currently driver
> modifies it by modifying rss_context. Hence fix it by using a
> local variable.
> 
> Fixes: 81a43620("octeontx2-pf: Add RSS multi group support")

Fixes tag: Fixes: 81a43620("octeontx2-pf: Add RSS multi group support")
Has these problem(s):
	- missing space between the SHA1 and the subject
	- SHA1 should be at least 12 digits long
	  Can be fixed by setting core.abbrev to 12 (or more) or (for git v2.11
	  or later) just making sure it is not set (or set to "auto").

Please fix the entire submission.
diff mbox series

Patch

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
index 0dbbf38..dc17784 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
@@ -257,17 +257,19 @@  int otx2_get_flow(struct otx2_nic *pfvf, struct ethtool_rxnfc *nfc,
 int otx2_get_all_flows(struct otx2_nic *pfvf, struct ethtool_rxnfc *nfc,
 		       u32 *rule_locs)
 {
+	u32 rule_cnt = nfc->rule_cnt;
 	u32 location = 0;
 	int idx = 0;
 	int err = 0;
 
 	nfc->data = pfvf->flow_cfg->ntuple_max_flows;
-	while ((!err || err == -ENOENT) && idx < nfc->rule_cnt) {
+	while ((!err || err == -ENOENT) && idx < rule_cnt) {
 		err = otx2_get_flow(pfvf, nfc, location);
 		if (!err)
 			rule_locs[idx++] = location;
 		location++;
 	}
+	nfc->rule_cnt = rule_cnt;
 
 	return err;
 }