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| author | Arthur Kiyanovski <akiyano@amazon.com> | 2019-09-16 14:31:36 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-09-16 22:06:03 +0200 |
| commit | 79226cea4a5ebbd84a4eee1762526f664c7beb62 (patch) | |
| tree | b8110d3f7480f504771f6e3f13782741eb4c34ef /drivers/net/ethernet/amazon/ena/ena_com.c | |
| parent | 0eda847953d8dfb4b713ea62420f66157e230e13 (diff) | |
| download | linux-79226cea4a5ebbd84a4eee1762526f664c7beb62.tar.gz linux-79226cea4a5ebbd84a4eee1762526f664c7beb62.tar.bz2 linux-79226cea4a5ebbd84a4eee1762526f664c7beb62.zip | |
net: ena: fix incorrect update of intr_delay_resolution
ena_dev->intr_moder_rx/tx_interval save the intervals received from the
user after dividing them by ena_dev->intr_delay_resolution. Therefore
when intr_delay_resolution changes, the code needs to first mutiply
intr_moder_rx/tx_interval by the previous intr_delay_resolution to get
the value originally given by the user, and only then divide it by the
new intr_delay_resolution.
Current code does not first multiply intr_moder_rx/tx_interval by the old
intr_delay_resolution. This commit fixes it.
Also initialize ena_dev->intr_delay_resolution to be 1.
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/amazon/ena/ena_com.c')
| -rw-r--r-- | drivers/net/ethernet/amazon/ena/ena_com.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c index 621b747f062b..ea62604fdf8c 100644 --- a/drivers/net/ethernet/amazon/ena/ena_com.c +++ b/drivers/net/ethernet/amazon/ena/ena_com.c @@ -1281,17 +1281,30 @@ static int ena_com_ind_tbl_convert_from_device(struct ena_com_dev *ena_dev) static void ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev, u16 intr_delay_resolution) { + /* Initial value of intr_delay_resolution might be 0 */ + u16 prev_intr_delay_resolution = + ena_dev->intr_delay_resolution ? + ena_dev->intr_delay_resolution : + ENA_DEFAULT_INTR_DELAY_RESOLUTION; + if (!intr_delay_resolution) { pr_err("Illegal intr_delay_resolution provided. Going to use default 1 usec resolution\n"); - intr_delay_resolution = 1; + intr_delay_resolution = ENA_DEFAULT_INTR_DELAY_RESOLUTION; } - ena_dev->intr_delay_resolution = intr_delay_resolution; /* update Rx */ - ena_dev->intr_moder_rx_interval /= intr_delay_resolution; + ena_dev->intr_moder_rx_interval = + ena_dev->intr_moder_rx_interval * + prev_intr_delay_resolution / + intr_delay_resolution; /* update Tx */ - ena_dev->intr_moder_tx_interval /= intr_delay_resolution; + ena_dev->intr_moder_tx_interval = + ena_dev->intr_moder_tx_interval * + prev_intr_delay_resolution / + intr_delay_resolution; + + ena_dev->intr_delay_resolution = intr_delay_resolution; } /*****************************************************************************/ |