lede/target/linux/ipq40xx/patches-4.19/716-essedma-reduce-write-reg.patch
2019-12-02 07:28:28 -08:00

55 lines
2.2 KiB
Diff

diff --git a/drivers/net/ethernet/qualcomm/essedma/edma.c b/drivers/net/ethernet/qualcomm/essedma/edma.c
index fc274c8..e9d12a4 100644
--- a/drivers/net/ethernet/qualcomm/essedma/edma.c
+++ b/drivers/net/ethernet/qualcomm/essedma/edma.c
@@ -2075,15 +2075,13 @@ int edma_poll(struct napi_struct *napi, int budget)
int i, work_done = 0;
u16 rx_pending_fill;
- /* Store the Rx/Tx status by ANDing it with
- * appropriate CPU RX?TX mask
+ /* Store the Tx status by ANDing it with
+ * appropriate CPU TX mask
*/
- edma_read_reg(EDMA_REG_RX_ISR, &reg_data);
- edma_percpu_info->rx_status |= reg_data & edma_percpu_info->rx_mask;
- shadow_rx_status = edma_percpu_info->rx_status;
edma_read_reg(EDMA_REG_TX_ISR, &reg_data);
edma_percpu_info->tx_status |= reg_data & edma_percpu_info->tx_mask;
shadow_tx_status = edma_percpu_info->tx_status;
+ edma_write_reg(EDMA_REG_TX_ISR, shadow_tx_status);
/* Every core will have a start, which will be computed
* in probe and stored in edma_percpu_info->tx_start variable.
@@ -2098,6 +2096,14 @@ int edma_poll(struct napi_struct *napi, int budget)
edma_percpu_info->tx_status &= ~(1 << queue_id);
}
+ /* Store the Rx status by ANDing it with
+ * appropriate CPU RX mask
+ */
+ edma_read_reg(EDMA_REG_RX_ISR, &reg_data);
+ edma_percpu_info->rx_status |= reg_data & edma_percpu_info->rx_mask;
+ shadow_rx_status = edma_percpu_info->rx_status;
+ edma_write_reg(EDMA_REG_RX_ISR, shadow_rx_status);
+
/* Every core will have a start, which will be computed
* in probe and stored in edma_percpu_info->tx_start variable.
* We will shift the status bit by tx_start to obtain
@@ -2122,15 +2128,6 @@ int edma_poll(struct napi_struct *napi, int budget)
}
}
- /* Clear the status register, to avoid the interrupts to
- * reoccur.This clearing of interrupt status register is
- * done here as writing to status register only takes place
- * once the producer/consumer index has been updated to
- * reflect that the packet transmission/reception went fine.
- */
- edma_write_reg(EDMA_REG_RX_ISR, shadow_rx_status);
- edma_write_reg(EDMA_REG_TX_ISR, shadow_tx_status);
-
/* If budget not fully consumed, exit the polling mode */
if (likely(work_done < budget)) {
napi_complete(napi);