add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/ata/libahci.c
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@@ -1199,6 +1199,26 @@
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 	return sprintf(buf, "%d\n", emp->blink_policy);
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 }
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+static void ahci_port_clear_pending_irq(struct ata_port *ap)
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+{
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+	struct ahci_host_priv *hpriv = ap->host->private_data;
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+	void __iomem *port_mmio = ahci_port_base(ap);
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+	u32 tmp;
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+
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+	/* clear SError */
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+	tmp = readl(port_mmio + PORT_SCR_ERR);
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+	dev_dbg(ap->host->dev, "PORT_SCR_ERR 0x%x\n", tmp);
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+	writel(tmp, port_mmio + PORT_SCR_ERR);
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+
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+	/* clear port IRQ */
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+	tmp = readl(port_mmio + PORT_IRQ_STAT);
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+	dev_dbg(ap->host->dev, "PORT_IRQ_STAT 0x%x\n", tmp);
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+	if (tmp)
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+		writel(tmp, port_mmio + PORT_IRQ_STAT);
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+
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+	writel(1 << ap->port_no, hpriv->mmio + HOST_IRQ_STAT);
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+}
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+
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 static void ahci_port_init(struct device *dev, struct ata_port *ap,
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 			   int port_no, void __iomem *mmio,
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 			   void __iomem *port_mmio)
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@@ -1213,18 +1233,7 @@
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 	if (rc)
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 		dev_warn(dev, "%s (%d)\n", emsg, rc);
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1235
 
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-	/* clear SError */
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-	tmp = readl(port_mmio + PORT_SCR_ERR);
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-	VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
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-	writel(tmp, port_mmio + PORT_SCR_ERR);
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-
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-	/* clear port IRQ */
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-	tmp = readl(port_mmio + PORT_IRQ_STAT);
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-	VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
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-	if (tmp)
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-		writel(tmp, port_mmio + PORT_IRQ_STAT);
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-
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-	writel(1 << port_no, mmio + HOST_IRQ_STAT);
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+	ahci_port_clear_pending_irq(ap);
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 	/* mark esata ports */
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 	tmp = readl(port_mmio + PORT_CMD);
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@@ -1251,10 +1260,10 @@
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 	}
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 	tmp = readl(mmio + HOST_CTL);
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-	VPRINTK("HOST_CTL 0x%x\n", tmp);
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+	dev_dbg(host->dev, "HOST_CTL 0x%x\n", tmp);
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 	writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
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 	tmp = readl(mmio + HOST_CTL);
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-	VPRINTK("HOST_CTL 0x%x\n", tmp);
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+	dev_dbg(host->dev, "HOST_CTL 0x%x\n", tmp);
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 }
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 EXPORT_SYMBOL_GPL(ahci_init_controller);
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..
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@@ -1553,6 +1562,8 @@
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 	ata_tf_init(link->device, &tf);
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 	tf.command = ATA_BUSY;
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 	ata_tf_to_fis(&tf, 0, 0, d2h_fis);
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+
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+	ahci_port_clear_pending_irq(ap);
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 	rc = sata_link_hardreset(link, timing, deadline, online,
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 				 ahci_check_ready);
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@@ -1905,16 +1916,12 @@
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 	void __iomem *port_mmio = ahci_port_base(ap);
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 	u32 status;
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-	VPRINTK("ENTER\n");
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-
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 	status = readl(port_mmio + PORT_IRQ_STAT);
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 	writel(status, port_mmio + PORT_IRQ_STAT);
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 	spin_lock(ap->lock);
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 	ahci_handle_port_interrupt(ap, port_mmio, status);
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 	spin_unlock(ap->lock);
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-
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-	VPRINTK("EXIT\n");
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 	return IRQ_HANDLED;
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 }
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@@ -1932,9 +1939,7 @@
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 		ap = host->ports[i];
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 		if (ap) {
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 			ahci_port_intr(ap);
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-			VPRINTK("port %u\n", i);
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 		} else {
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-			VPRINTK("port %u (no irq)\n", i);
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 			if (ata_ratelimit())
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 				dev_warn(host->dev,
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 					 "interrupt on disabled port %u\n", i);
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@@ -1954,8 +1959,6 @@
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 	unsigned int rc = 0;
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 	void __iomem *mmio;
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 	u32 irq_stat, irq_masked;
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-
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-	VPRINTK("ENTER\n");
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 	hpriv = host->private_data;
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 	mmio = hpriv->mmio;
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@@ -1983,8 +1986,6 @@
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 	writel(irq_stat, mmio + HOST_IRQ_STAT);
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 	spin_unlock(&host->lock);
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-
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-	VPRINTK("EXIT\n");
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 	return IRQ_RETVAL(rc);
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 }