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[net-next,v3,10/12] net: ethernet: aquantia: Fixed incorrect buff->len calculation.

Message ID b703af4f41548212e31a65897eee243e59f4083d.1487590641.git.pavel.belous@aquantia.com
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Pavel Belous Feb. 20, 2017, 11:41 a.m. UTC 
From: Pavel Belous <pavel.belous@aquantia.com>

rxd_wb->pkt_len is the total length of the packet.
If we received a large packet (with length > AQ_CFG_RX_FRAME_MAX) then we
will get multiple buffers. We need to fix the length of the last buffer.

Signed-off-by: Pavel Belous <pavel.belous@aquantia.com>
---
 drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c | 4 ++--
 drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
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Patch

diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
index 1f38805..a2b746a 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
@@ -659,8 +659,8 @@  static int hw_atl_a0_hw_ring_rx_receive(struct aq_hw_s *self,
 			}
 
 			if (HW_ATL_A0_RXD_WB_STAT2_EOP & rxd_wb->status) {
-				buff->len = (rxd_wb->pkt_len &
-						(AQ_CFG_RX_FRAME_MAX - 1U));
+				buff->len = rxd_wb->pkt_len %
+					AQ_CFG_RX_FRAME_MAX;
 				buff->len = buff->len ?
 					buff->len : AQ_CFG_RX_FRAME_MAX;
 				buff->next = 0U;
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
index e7e694f..cab2931 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
@@ -673,8 +673,8 @@  static int hw_atl_b0_hw_ring_rx_receive(struct aq_hw_s *self,
 			}
 
 			if (HW_ATL_B0_RXD_WB_STAT2_EOP & rxd_wb->status) {
-				buff->len = (rxd_wb->pkt_len &
-						(AQ_CFG_RX_FRAME_MAX - 1U));
+				buff->len = rxd_wb->pkt_len %
+					AQ_CFG_RX_FRAME_MAX;
 				buff->len = buff->len ?
 					buff->len : AQ_CFG_RX_FRAME_MAX;
 				buff->next = 0U;