xen/pci: Get rid of verbose_request and use dev_dbg() instead

Information printed under verbose_request is clearly used for debugging
only. Remove it and use dev_dbg() instead.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/1590719092-8578-1-git-send-email-boris.ostrovsky@oracle.comReviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

drivers/pci/xen-pcifront.c

@@ -77,9 +77,6 @@ static inline void pcifront_init_sd(struct pcifront_sd *sd,
 static DEFINE_SPINLOCK(pcifront_dev_lock);
 static struct pcifront_device *pcifront_dev;
 
-static int verbose_request;
-module_param(verbose_request, int, 0644);
-
 static int errno_to_pcibios_err(int errno)
 {
 	switch (errno) {
@@ -190,8 +187,7 @@ static int pcifront_bus_read(struct pci_bus *bus, unsigned int devfn,
 	struct pcifront_sd *sd = bus->sysdata;
 	struct pcifront_device *pdev = pcifront_get_pdev(sd);
 
-	if (verbose_request)
-		dev_info(&pdev->xdev->dev,
+	dev_dbg(&pdev->xdev->dev,
 		"read dev=%04x:%02x:%02x.%d - offset %x size %d\n",
 		pci_domain_nr(bus), bus->number, PCI_SLOT(devfn),
 		PCI_FUNC(devfn), where, size);
@@ -199,8 +195,7 @@ static int pcifront_bus_read(struct pci_bus *bus, unsigned int devfn,
 	err = do_pci_op(pdev, &op);
 
 	if (likely(!err)) {
-		if (verbose_request)
-			dev_info(&pdev->xdev->dev, "read got back value %x\n",
+		dev_dbg(&pdev->xdev->dev, "read got back value %x\n",
 			op.value);
 
 		*val = op.value;
@@ -229,10 +224,8 @@ static int pcifront_bus_write(struct pci_bus *bus, unsigned int devfn,
 	struct pcifront_sd *sd = bus->sysdata;
 	struct pcifront_device *pdev = pcifront_get_pdev(sd);
 
-	if (verbose_request)
-		dev_info(&pdev->xdev->dev,
-			 "write dev=%04x:%02x:%02x.%d - "
-			 "offset %x size %d val %x\n",
+	dev_dbg(&pdev->xdev->dev,
+		"write dev=%04x:%02x:%02x.%d - offset %x size %d val %x\n",
 		pci_domain_nr(bus), bus->number,
 		PCI_SLOT(devfn), PCI_FUNC(devfn), where, size, val);
 

drivers/xen/xen-pciback/conf_space.c

@@ -156,9 +156,7 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
 	 * (as if device didn't respond) */
 	u32 value = 0, tmp_val;
 
-	if (unlikely(verbose_request))
-		dev_printk(KERN_DEBUG, &dev->dev, "read %d bytes at 0x%x\n",
-			   size, offset);
+	dev_dbg(&dev->dev, "read %d bytes at 0x%x\n", size, offset);
 
 	if (!valid_request(offset, size)) {
 		err = XEN_PCI_ERR_invalid_offset;
@@ -197,9 +195,7 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
 	}
 
 out:
-	if (unlikely(verbose_request))
-		dev_printk(KERN_DEBUG, &dev->dev,
-			   "read %d bytes at 0x%x = %x\n", size, offset, value);
+	dev_dbg(&dev->dev, "read %d bytes at 0x%x = %x\n", size, offset, value);
 
 	*ret_val = value;
 	return xen_pcibios_err_to_errno(err);
@@ -214,10 +210,8 @@ int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size, u32 value)
 	u32 tmp_val;
 	int field_start, field_end;
 
-	if (unlikely(verbose_request))
-		dev_printk(KERN_DEBUG, &dev->dev,
-			   "write request %d bytes at 0x%x = %x\n", size,
-			   offset, value);
+	dev_dbg(&dev->dev, "write request %d bytes at 0x%x = %x\n",
+		size, offset, value);
 
 	if (!valid_request(offset, size))
 		return XEN_PCI_ERR_invalid_offset;

drivers/xen/xen-pciback/conf_space_header.c

@@ -68,36 +68,30 @@ static int command_write(struct pci_dev *dev, int offset, u16 value, void *data)
 
 	dev_data = pci_get_drvdata(dev);
 	if (!pci_is_enabled(dev) && is_enable_cmd(value)) {
-		if (unlikely(verbose_request))
-			dev_printk(KERN_DEBUG, &dev->dev, "enable\n");
+		dev_dbg(&dev->dev, "enable\n");
 		err = pci_enable_device(dev);
 		if (err)
 			return err;
 		if (dev_data)
 			dev_data->enable_intx = 1;
 	} else if (pci_is_enabled(dev) && !is_enable_cmd(value)) {
-		if (unlikely(verbose_request))
-			dev_printk(KERN_DEBUG, &dev->dev, "disable\n");
+		dev_dbg(&dev->dev, "disable\n");
 		pci_disable_device(dev);
 		if (dev_data)
 			dev_data->enable_intx = 0;
 	}
 
 	if (!dev->is_busmaster && is_master_cmd(value)) {
-		if (unlikely(verbose_request))
-			dev_printk(KERN_DEBUG, &dev->dev, "set bus master\n");
+		dev_dbg(&dev->dev, "set bus master\n");
 		pci_set_master(dev);
 	} else if (dev->is_busmaster && !is_master_cmd(value)) {
-		if (unlikely(verbose_request))
-			dev_printk(KERN_DEBUG, &dev->dev, "clear bus master\n");
+		dev_dbg(&dev->dev, "clear bus master\n");
 		pci_clear_master(dev);
 	}
 
 	if (!(cmd->val & PCI_COMMAND_INVALIDATE) &&
 	    (value & PCI_COMMAND_INVALIDATE)) {
-		if (unlikely(verbose_request))
-			dev_printk(KERN_DEBUG, &dev->dev,
-				   "enable memory-write-invalidate\n");
+		dev_dbg(&dev->dev, "enable memory-write-invalidate\n");
 		err = pci_set_mwi(dev);
 		if (err) {
 			dev_warn(&dev->dev, "cannot enable memory-write-invalidate (%d)\n",
@@ -106,9 +100,7 @@ static int command_write(struct pci_dev *dev, int offset, u16 value, void *data)
 		}
 	} else if ((cmd->val & PCI_COMMAND_INVALIDATE) &&
 		   !(value & PCI_COMMAND_INVALIDATE)) {
-		if (unlikely(verbose_request))
-			dev_printk(KERN_DEBUG, &dev->dev,
-				   "disable memory-write-invalidate\n");
+		dev_dbg(&dev->dev, "disable memory-write-invalidate\n");
 		pci_clear_mwi(dev);
 	}
 

drivers/xen/xen-pciback/pciback.h

@@ -186,8 +186,6 @@ void xen_pcibk_do_op(struct work_struct *data);
 int xen_pcibk_xenbus_register(void);
 void xen_pcibk_xenbus_unregister(void);
 
-extern int verbose_request;
-
 void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev);
 #endif
 

drivers/xen/xen-pciback/pciback_ops.c

@@ -15,9 +15,6 @@
 #include <linux/sched.h>
 #include "pciback.h"
 
-int verbose_request;
-module_param(verbose_request, int, 0644);
-
 static irqreturn_t xen_pcibk_guest_interrupt(int irq, void *dev_id);
 
 /* Ensure a device is has the fake IRQ handler "turned on/off" and is
@@ -148,9 +145,6 @@ int xen_pcibk_enable_msi(struct xen_pcibk_device *pdev,
 	struct xen_pcibk_dev_data *dev_data;
 	int status;
 
-	if (unlikely(verbose_request))
-		dev_printk(KERN_DEBUG, &dev->dev, "enable MSI\n");
-
 	if (dev->msi_enabled)
 		status = -EALREADY;
 	else if (dev->msix_enabled)
@@ -169,8 +163,8 @@ int xen_pcibk_enable_msi(struct xen_pcibk_device *pdev,
 	 * the local domain's IRQ number. */
 
 	op->value = dev->irq ? xen_pirq_from_irq(dev->irq) : 0;
-	if (unlikely(verbose_request))
-		dev_printk(KERN_DEBUG, &dev->dev, "MSI: %d\n", op->value);
+
+	dev_dbg(&dev->dev, "MSI: %d\n", op->value);
 
 	dev_data = pci_get_drvdata(dev);
 	if (dev_data)
@@ -183,9 +177,6 @@ static
 int xen_pcibk_disable_msi(struct xen_pcibk_device *pdev,
 			  struct pci_dev *dev, struct xen_pci_op *op)
 {
-	if (unlikely(verbose_request))
-		dev_printk(KERN_DEBUG, &dev->dev, "disable MSI\n");
-
 	if (dev->msi_enabled) {
 		struct xen_pcibk_dev_data *dev_data;
 
@@ -196,8 +187,9 @@ int xen_pcibk_disable_msi(struct xen_pcibk_device *pdev,
 			dev_data->ack_intr = 1;
 	}
 	op->value = dev->irq ? xen_pirq_from_irq(dev->irq) : 0;
-	if (unlikely(verbose_request))
-		dev_printk(KERN_DEBUG, &dev->dev, "MSI: %d\n", op->value);
+
+	dev_dbg(&dev->dev, "MSI: %d\n", op->value);
+
 	return 0;
 }
 
@@ -210,8 +202,7 @@ int xen_pcibk_enable_msix(struct xen_pcibk_device *pdev,
 	struct msix_entry *entries;
 	u16 cmd;
 
-	if (unlikely(verbose_request))
-		dev_printk(KERN_DEBUG, &dev->dev, "enable MSI-X\n");
+	dev_dbg(&dev->dev, "enable MSI-X\n");
 
 	if (op->value > SH_INFO_MAX_VEC)
 		return -EINVAL;
@@ -244,9 +235,7 @@ int xen_pcibk_enable_msix(struct xen_pcibk_device *pdev,
 			if (entries[i].vector) {
 				op->msix_entries[i].vector =
 					xen_pirq_from_irq(entries[i].vector);
-				if (unlikely(verbose_request))
-					dev_printk(KERN_DEBUG, &dev->dev,
-						"MSI-X[%d]: %d\n", i,
+				dev_dbg(&dev->dev, "MSI-X[%d]: %d\n", i,
 					op->msix_entries[i].vector);
 			}
 		}
@@ -267,9 +256,6 @@ static
 int xen_pcibk_disable_msix(struct xen_pcibk_device *pdev,
 			   struct pci_dev *dev, struct xen_pci_op *op)
 {
-	if (unlikely(verbose_request))
-		dev_printk(KERN_DEBUG, &dev->dev, "disable MSI-X\n");
-
 	if (dev->msix_enabled) {
 		struct xen_pcibk_dev_data *dev_data;
 
@@ -284,8 +270,9 @@ int xen_pcibk_disable_msix(struct xen_pcibk_device *pdev,
 	 * an undefined IRQ value of zero.
 	 */
 	op->value = dev->irq ? xen_pirq_from_irq(dev->irq) : 0;
-	if (unlikely(verbose_request))
-		dev_printk(KERN_DEBUG, &dev->dev, "MSI-X: %d\n", op->value);
+
+	dev_dbg(&dev->dev, "MSI-X: %d\n", op->value);
+
 	return 0;
 }
 #endif