From 4eafb2c053cc5935fe826da97fda42abadab5fc1 Mon Sep 17 00:00:00 2001 From: David Thompson Date: Wed, 11 May 2022 09:52:51 -0400 Subject: [PATCH backport 5.10 31/63] mlxbf_gige: remove driver-managed interrupt counts BugLink: https://bugs.launchpad.net/bugs/1979827 The driver currently has three interrupt counters, which are incremented every time each interrupt handler executes. These driver-managed counters are not necessary as the kernel already has logic that manages interrupt counts and exposes them via /proc/interrupts. This patch removes the driver-managed counters. Signed-off-by: David Thompson Signed-off-by: Asmaa Mnebhi Link: https://lore.kernel.org/r/20220511135251.2989-1-davthompson@nvidia.com Signed-off-by: Jakub Kicinski (cherry picked from commit f4826443f4d69d2c97c184952c085caf0936a7b8) Signed-off-by: Ike Panhc --- drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige.h | 3 --- .../ethernet/mellanox/mlxbf_gige/mlxbf_gige_ethtool.c | 8 +++----- .../net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_intr.c | 9 --------- 3 files changed, 3 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige.h b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige.h index 86826a70f..5fdf9b717 100644 --- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige.h +++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige.h @@ -90,9 +90,6 @@ struct mlxbf_gige { dma_addr_t rx_cqe_base_dma; u16 tx_pi; u16 prev_tx_ci; - u64 error_intr_count; - u64 rx_intr_count; - u64 llu_plu_intr_count; struct sk_buff *rx_skb[MLXBF_GIGE_MAX_RXQ_SZ]; struct sk_buff *tx_skb[MLXBF_GIGE_MAX_TXQ_SZ]; int error_irq; diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_ethtool.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_ethtool.c index 92b798f8e..af46b0cd7 100644 --- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_ethtool.c +++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_ethtool.c @@ -24,11 +24,9 @@ static void mlxbf_gige_get_regs(struct net_device *netdev, regs->version = MLXBF_GIGE_REGS_VERSION; /* Read entire MMIO register space and store results - * into the provided buffer. Each 64-bit word is converted - * to big-endian to make the output more readable. - * - * NOTE: by design, a read to an offset without an existing - * register will be acknowledged and return zero. + * into the provided buffer. By design, a read to an + * offset without an existing register will be + * acknowledged and return zero. */ memcpy_fromio(p, priv->base, MLXBF_GIGE_MMIO_REG_SZ); } diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_intr.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_intr.c index c38795be0..5b3519f0c 100644 --- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_intr.c +++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_intr.c @@ -17,8 +17,6 @@ static irqreturn_t mlxbf_gige_error_intr(int irq, void *dev_id) priv = dev_id; - priv->error_intr_count++; - int_status = readq(priv->base + MLXBF_GIGE_INT_STATUS); if (int_status & MLXBF_GIGE_INT_STATUS_HW_ACCESS_ERROR) @@ -75,8 +73,6 @@ static irqreturn_t mlxbf_gige_rx_intr(int irq, void *dev_id) priv = dev_id; - priv->rx_intr_count++; - /* NOTE: GigE silicon automatically disables "packet rx" interrupt by * setting MLXBF_GIGE_INT_MASK bit0 upon triggering the interrupt * to the ARM cores. Software needs to re-enable "packet rx" @@ -90,11 +86,6 @@ static irqreturn_t mlxbf_gige_rx_intr(int irq, void *dev_id) static irqreturn_t mlxbf_gige_llu_plu_intr(int irq, void *dev_id) { - struct mlxbf_gige *priv; - - priv = dev_id; - priv->llu_plu_intr_count++; - return IRQ_HANDLED; } -- 2.20.1