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| author | Michael Chan | 2016-09-19 09:58:04 +0200 |
|---|---|---|
| committer | David S. Miller | 2016-09-20 03:32:25 +0200 |
| commit | 47f8e8b9bbbbe00740786bd1da0d5097d45ba46b (patch) | |
| tree | 127d358416b8b4b97d007c27b435778ecd269664 /drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | |
| parent | bnxt_en: Added support for Secure Firmware Update (diff) | |
| download | kernel-qcow2-linux-47f8e8b9bbbbe00740786bd1da0d5097d45ba46b.tar.gz kernel-qcow2-linux-47f8e8b9bbbbe00740786bd1da0d5097d45ba46b.tar.xz kernel-qcow2-linux-47f8e8b9bbbbe00740786bd1da0d5097d45ba46b.zip | |
bnxt_en: Fix ethtool -l|-L inconsistent channel counts.
The existing code is inconsistent in reporting and accepting the combined
channel count. bnxt_get_channels() reports maximum combined as the
maximum rx count. bnxt_set_channels() accepts combined count that
cannot be bigger than max rx or max tx.
For example, if max rx = 2 and max tx = 1, we report max supported
combined to be 2. But if the user tries to set combined to 2, it will
fail because 2 is bigger than max tx which is 1.
Fix the code to be consistent. Max allowed combined = max(max_rx, max_tx).
We will accept a combined channel count <= max(max_rx, max_tx).
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c index 4a430b623489..c74ce698805e 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c @@ -348,7 +348,7 @@ static void bnxt_get_channels(struct net_device *dev, int max_rx_rings, max_tx_rings, tcs; bnxt_get_max_rings(bp, &max_rx_rings, &max_tx_rings, true); - channel->max_combined = max_rx_rings; + channel->max_combined = max_t(int, max_rx_rings, max_tx_rings); if (bnxt_get_max_rings(bp, &max_rx_rings, &max_tx_rings, false)) { max_rx_rings = 0; @@ -406,8 +406,8 @@ static int bnxt_set_channels(struct net_device *dev, if (tcs > 1) max_tx_rings /= tcs; - if (sh && (channel->combined_count > max_rx_rings || - channel->combined_count > max_tx_rings)) + if (sh && + channel->combined_count > max_t(int, max_rx_rings, max_tx_rings)) return -ENOMEM; if (!sh && (channel->rx_count > max_rx_rings || @@ -430,8 +430,10 @@ static int bnxt_set_channels(struct net_device *dev, if (sh) { bp->flags |= BNXT_FLAG_SHARED_RINGS; - bp->rx_nr_rings = channel->combined_count; - bp->tx_nr_rings_per_tc = channel->combined_count; + bp->rx_nr_rings = min_t(int, channel->combined_count, + max_rx_rings); + bp->tx_nr_rings_per_tc = min_t(int, channel->combined_count, + max_tx_rings); } else { bp->flags &= ~BNXT_FLAG_SHARED_RINGS; bp->rx_nr_rings = channel->rx_count; |