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octeontx2-pf: Do not modify number of rules

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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: 81a4362016 ("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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Subbaraya Sundeep 2021-03-18 19:45:42 +05:30 committed by David S. Miller
parent 804741ac7b
commit f41b2d67d7
1 changed files with 3 additions and 1 deletions
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4
drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
View File

@ -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;
}