linux-kernel - [PATCH 2/6] ARM: ks8695, net: use disable_irq/enable

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Message-Id: <20190415202501.941196-2-arnd@arndb.de>
Date:   Mon, 15 Apr 2019 22:24:14 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Greg Ungerer <gerg@...inux.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>, arm@...nel.org,
        Arnd Bergmann <arnd@...db.de>,
        "David S. Miller" <davem@...emloft.net>,
        YueHaibing <yuehaibing@...wei.com>,
        Yang Wei <yang.wei9@....com.cn>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/6] ARM: ks8695, net: use disable_irq/enable_irq

Rather than poking the registers manually, better use the exported
interfaces for it.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/net/ethernet/micrel/ks8695net.c | 30 ++-----------------------
 1 file changed, 2 insertions(+), 28 deletions(-)

diff --git a/drivers/net/ethernet/micrel/ks8695net.c b/drivers/net/ethernet/micrel/ks8695net.c
index 6006d47707cb..3b6375adff08 100644
--- a/drivers/net/ethernet/micrel/ks8695net.c
+++ b/drivers/net/ethernet/micrel/ks8695net.c
@@ -402,25 +402,6 @@ ks8695_tx_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-/**
- *	ks8695_get_rx_enable_bit - Get rx interrupt enable/status bit
- *	@ksp: Private data for the KS8695 Ethernet
- *
- *    For KS8695 document:
- *    Interrupt Enable Register (offset 0xE204)
- *        Bit29 : WAN MAC Receive Interrupt Enable
- *        Bit16 : LAN MAC Receive Interrupt Enable
- *    Interrupt Status Register (Offset 0xF208)
- *        Bit29: WAN MAC Receive Status
- *        Bit16: LAN MAC Receive Status
- *    So, this Rx interrupt enable/status bit number is equal
- *    as Rx IRQ number.
- */
-static inline u32 ks8695_get_rx_enable_bit(struct ks8695_priv *ksp)
-{
-	return ksp->rx_irq;
-}
-
 /**
  *	ks8695_rx_irq - Receive IRQ handler
  *	@irq: The IRQ which went off (ignored)
@@ -438,11 +419,7 @@ ks8695_rx_irq(int irq, void *dev_id)
 	spin_lock(&ksp->rx_lock);
 
 	if (napi_schedule_prep(&ksp->napi)) {
-		unsigned long status = readl(KS8695_IRQ_VA + KS8695_INTEN);
-		unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp);
-		/*disable rx interrupt*/
-		status &= ~mask_bit;
-		writel(status , KS8695_IRQ_VA + KS8695_INTEN);
+		disable_irq(ksp->rx_irq);
 		__napi_schedule(&ksp->napi);
 	}
 
@@ -561,8 +538,6 @@ static int ks8695_rx(struct ks8695_priv *ksp, int budget)
 static int ks8695_poll(struct napi_struct *napi, int budget)
 {
 	struct ks8695_priv *ksp = container_of(napi, struct ks8695_priv, napi);
-	unsigned long isr = readl(KS8695_IRQ_VA + KS8695_INTEN);
-	unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp);
 	int work_done;
 
 	work_done = ks8695_rx(ksp, budget);
@@ -571,8 +546,7 @@ static int ks8695_poll(struct napi_struct *napi, int budget)
 		unsigned long flags;
 
 		spin_lock_irqsave(&ksp->rx_lock, flags);
-		/* enable rx interrupt */
-		writel(isr | mask_bit, KS8695_IRQ_VA + KS8695_INTEN);
+		enable_irq(ksp->rx_irq);
 		spin_unlock_irqrestore(&ksp->rx_lock, flags);
 	}
 	return work_done;
-- 
2.20.0