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Message-Id: <20240124223211.4687-9-wahrenst@gmx.net>
Date: Wed, 24 Jan 2024 23:32:05 +0100
From: Stefan Wahren <wahrenst@....net>
To: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: Lino Sanfilippo <LinoSanfilippo@....de>,
Florian Fainelli <f.fainelli@...il.com>,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
Stefan Wahren <wahrenst@....net>,
Jacob Keller <jacob.e.keller@...el.com>
Subject: [PATCH V3 08/14 next] qca_spi: Improve calculation of RX buffer size
There are two points with the calculation of RX buffer size which are
not optimal:
1. dev->mtu is a mutual parameter and it's currently initialized with
QCAFRM_MAX_MTU. But for RX buffer size calculation we always need the
maximum possible MTU. So better use the define directly.
2. This magic number 4 represent the hardware generated frame length
which is specific to SPI. We better replace this with the suitable
define.
There is no functional change.
Signed-off-by: Stefan Wahren <wahrenst@....net>
Reviewed-by: Jacob Keller <jacob.e.keller@...el.com>
---
drivers/net/ethernet/qualcomm/qca_spi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index 80182f8a4a50..6d2859aad921 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -813,8 +813,8 @@ qcaspi_netdev_init(struct net_device *dev)
qca->clkspeed = qcaspi_clkspeed;
qca->burst_len = qcaspi_burst_len;
qca->spi_thread = NULL;
- qca->buffer_size = (dev->mtu + VLAN_ETH_HLEN + QCAFRM_HEADER_LEN +
- QCAFRM_FOOTER_LEN + 4) * QCASPI_RX_MAX_FRAMES;
+ qca->buffer_size = (QCAFRM_MAX_MTU + VLAN_ETH_HLEN + QCAFRM_HEADER_LEN +
+ QCAFRM_FOOTER_LEN + QCASPI_HW_PKT_LEN) * QCASPI_RX_MAX_FRAMES;
memset(&qca->stats, 0, sizeof(struct qcaspi_stats));
--
2.34.1
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