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From: Hariprasad Kelam <hkelam@marvell.com>
To: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: <kuba@kernel.org>, <davem@davemloft.net>, <sgoutham@marvell.com>,
	<lcherian@marvell.com>, <gakula@marvell.com>,
	<jerinj@marvell.com>, <sbhatta@marvell.com>, <hkelam@marvell.com>
Subject: [net PATCH 1/9] octeontx2-pf: Do not modify number of rules
Date: Tue, 16 Mar 2021 14:57:05 +0530	[thread overview]
Message-ID: <1615886833-71688-2-git-send-email-hkelam@marvell.com> (raw)
In-Reply-To: <1615886833-71688-1-git-send-email-hkelam@marvell.com>

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(-)

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;
 }
-- 
2.7.4


  reply	other threads:[~2021-03-16  9:28 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16  9:27 [net PATCH 0/9] octeontx2: miscellaneous fixes Hariprasad Kelam
2021-03-16  9:27 ` Hariprasad Kelam [this message]
2021-03-16 17:02   ` [net PATCH 1/9] octeontx2-pf: Do not modify number of rules Jakub Kicinski
2021-03-16  9:27 ` [net PATCH 2/9] octeontx2-af: Formatting debugfs entry rsrc_alloc Hariprasad Kelam
2021-03-16  9:27 ` [net PATCH 3/9] octeontx2-af: Do not allocate memory for devlink private Hariprasad Kelam
2021-03-16 17:04   ` Jakub Kicinski
2021-03-16 18:03     ` sundeep subbaraya
2021-03-16 20:27       ` Jakub Kicinski
2021-03-17  5:40         ` sundeep subbaraya
2021-03-16  9:27 ` [net PATCH 4/9] octeontx2-af: Remove TOS field from MKEX TX Hariprasad Kelam
2021-03-16 17:06   ` Jakub Kicinski
2021-03-17  6:37     ` sundeep subbaraya
2021-03-17 18:47       ` Jakub Kicinski
2021-03-16  9:27 ` [net PATCH 5/9] octeontx2-af: Return correct CGX RX fifo size Hariprasad Kelam
2021-03-16  9:27 ` [net PATCH 6/9] octeontx2-af: Fix irq free in rvu teardown Hariprasad Kelam
2021-03-16  9:27 ` [net PATCH 7/9] octeontx2-pf: Clear RSS enable flag on interace down Hariprasad Kelam
2021-03-16  9:27 ` [net PATCH 8/9] octeontx2-af: fix infinite loop in unmapping counter Hariprasad Kelam
2021-03-16  9:27 ` [net PATCH 9/9] octeontx2-af: Fix uninitialized variable warning Hariprasad Kelam

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