[PATCH 4.9 245/310] net: ena: disable admin msix while working in polling mode

From: Greg Kroah-Hartman
Date: Wed Apr 11 2018 - 15:04:04 EST


4.9-stable review patch. If anyone has any objections, please let me know.

------------------

From: Netanel Belgazal <netanel@xxxxxxxxxx>


[ Upstream commit a2cc5198dac102775b21787752a2e0afe44ad311 ]

Fixes: 1738cd3ed342 ("Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Netanel Belgazal <netanel@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/amazon/ena/ena_com.c | 8 ++++++++
1 file changed, 8 insertions(+)

--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -61,6 +61,8 @@

#define ENA_MMIO_READ_TIMEOUT 0xFFFFFFFF

+#define ENA_REGS_ADMIN_INTR_MASK 1
+
/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/
@@ -1448,6 +1450,12 @@ void ena_com_admin_destroy(struct ena_co

void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling)
{
+ u32 mask_value = 0;
+
+ if (polling)
+ mask_value = ENA_REGS_ADMIN_INTR_MASK;
+
+ writel(mask_value, ena_dev->reg_bar + ENA_REGS_INTR_MASK_OFF);
ena_dev->admin_queue.polling = polling;
}