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net: davinci_emac: Fix interrupt pacing disable
This patch allows to use 0 for `coal->rx_coalesce_usecs` param to
disable rx irq coalescing.
Previously we could enable rx irq coalescing via ethtool
(For ex: `ethtool -C eth0 rx-usecs 2000`) but we couldn't disable
it because this part rejects 0 value:
if (!coal->rx_coalesce_usecs)
return -EINVAL;
Fixes: 84da2658a6
("TI DaVinci EMAC : Implement interrupt pacing functionality.")
Signed-off-by: Maxim Kiselev <bigunclemax@gmail.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20211101152343.4193233-1-bigunclemax@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
parent
26499499ca
commit
d52bcb47bd
1 changed files with 14 additions and 2 deletions
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@ -420,8 +420,20 @@ static int emac_set_coalesce(struct net_device *ndev,
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u32 int_ctrl, num_interrupts = 0;
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u32 prescale = 0, addnl_dvdr = 1, coal_intvl = 0;
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if (!coal->rx_coalesce_usecs)
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return -EINVAL;
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if (!coal->rx_coalesce_usecs) {
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priv->coal_intvl = 0;
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switch (priv->version) {
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case EMAC_VERSION_2:
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emac_ctrl_write(EMAC_DM646X_CMINTCTRL, 0);
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break;
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default:
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emac_ctrl_write(EMAC_CTRL_EWINTTCNT, 0);
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break;
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}
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return 0;
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}
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coal_intvl = coal->rx_coalesce_usecs;
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