[PATCH 0/2] xen: Use dev_printk() when possible

[PATCH 0/2] xen: Use dev_printk() when possible

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

Use dev_printk() when possible to include device and driver information in
the conventional format.

Bjorn Helgaas (2):
  xen-pciback: Use dev_printk() when possible
  xenbus: Use dev_printk() when possible

 drivers/xen/xen-pciback/conf_space.c        | 16 +++++----
 drivers/xen/xen-pciback/conf_space_header.c | 40 +++++++++------------
 drivers/xen/xen-pciback/conf_space_quirks.c |  6 ++--
 drivers/xen/xen-pciback/pci_stub.c          | 38 +++++++++-----------
 drivers/xen/xen-pciback/pciback_ops.c       | 38 ++++++++------------
 drivers/xen/xen-pciback/vpci.c              | 10 +++---
 drivers/xen/xenbus/xenbus_probe.c           | 11 +++---
 7 files changed, 70 insertions(+), 89 deletions(-)


base-commit: 8f3d9f354286745c751374f5f1fcafee6b3f3136
-- 
2.25.1

[PATCH 1/2] xen-pciback: Use dev_printk() when possible

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

Use dev_printk() when possible to include device and driver information in
the conventional format.

Add "#define dev_fmt" when needed to preserve DRV_NAME or KBUILD_MODNAME in
messages.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/xen/xen-pciback/conf_space.c        | 16 +++++----
 drivers/xen/xen-pciback/conf_space_header.c | 40 +++++++++------------
 drivers/xen/xen-pciback/conf_space_quirks.c |  6 ++--
 drivers/xen/xen-pciback/pci_stub.c          | 38 +++++++++-----------
 drivers/xen/xen-pciback/pciback_ops.c       | 38 ++++++++------------
 drivers/xen/xen-pciback/vpci.c              | 10 +++---
 6 files changed, 65 insertions(+), 83 deletions(-)

diff --git a/drivers/xen/xen-pciback/conf_space.c b/drivers/xen/xen-pciback/conf_space.c
index da51a5d34e6e..f2df4e55fc1b 100644
--- a/drivers/xen/xen-pciback/conf_space.c
+++ b/drivers/xen/xen-pciback/conf_space.c
@@ -10,6 +10,8 @@
  * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
  */
 
+#define dev_fmt(fmt) DRV_NAME ": " fmt
+
 #include <linux/kernel.h>
 #include <linux/moduleparam.h>
 #include <linux/pci.h>
@@ -155,8 +157,8 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
 	u32 value = 0, tmp_val;
 
 	if (unlikely(verbose_request))
-		printk(KERN_DEBUG DRV_NAME ": %s: read %d bytes at 0x%x\n",
-		       pci_name(dev), size, offset);
+		dev_printk(KERN_DEBUG, &dev->dev, "read %d bytes at 0x%x\n",
+			   size, offset);
 
 	if (!valid_request(offset, size)) {
 		err = XEN_PCI_ERR_invalid_offset;
@@ -196,8 +198,8 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
 
 out:
 	if (unlikely(verbose_request))
-		printk(KERN_DEBUG DRV_NAME ": %s: read %d bytes at 0x%x = %x\n",
-		       pci_name(dev), size, offset, value);
+		dev_printk(KERN_DEBUG, &dev->dev,
+			   "read %d bytes at 0x%x = %x\n", size, offset, value);
 
 	*ret_val = value;
 	return xen_pcibios_err_to_errno(err);
@@ -213,9 +215,9 @@ int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size, u32 value)
 	int field_start, field_end;
 
 	if (unlikely(verbose_request))
-		printk(KERN_DEBUG
-		       DRV_NAME ": %s: write request %d bytes at 0x%x = %x\n",
-		       pci_name(dev), size, offset, value);
+		dev_printk(KERN_DEBUG, &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;
diff --git a/drivers/xen/xen-pciback/conf_space_header.c b/drivers/xen/xen-pciback/conf_space_header.c
index fb4fccb4aecc..b277b689f257 100644
--- a/drivers/xen/xen-pciback/conf_space_header.c
+++ b/drivers/xen/xen-pciback/conf_space_header.c
@@ -6,6 +6,7 @@
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#define dev_fmt pr_fmt
 
 #include <linux/kernel.h>
 #include <linux/pci.h>
@@ -68,8 +69,7 @@ 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))
-			printk(KERN_DEBUG DRV_NAME ": %s: enable\n",
-			       pci_name(dev));
+			dev_printk(KERN_DEBUG, &dev->dev, "enable\n");
 		err = pci_enable_device(dev);
 		if (err)
 			return err;
@@ -77,8 +77,7 @@ static int command_write(struct pci_dev *dev, int offset, u16 value, void *data)
 			dev_data->enable_intx = 1;
 	} else if (pci_is_enabled(dev) && !is_enable_cmd(value)) {
 		if (unlikely(verbose_request))
-			printk(KERN_DEBUG DRV_NAME ": %s: disable\n",
-			       pci_name(dev));
+			dev_printk(KERN_DEBUG, &dev->dev, "disable\n");
 		pci_disable_device(dev);
 		if (dev_data)
 			dev_data->enable_intx = 0;
@@ -86,34 +85,30 @@ static int command_write(struct pci_dev *dev, int offset, u16 value, void *data)
 
 	if (!dev->is_busmaster && is_master_cmd(value)) {
 		if (unlikely(verbose_request))
-			printk(KERN_DEBUG DRV_NAME ": %s: set bus master\n",
-			       pci_name(dev));
+			dev_printk(KERN_DEBUG, &dev->dev, "set bus master\n");
 		pci_set_master(dev);
 	} else if (dev->is_busmaster && !is_master_cmd(value)) {
 		if (unlikely(verbose_request))
-			printk(KERN_DEBUG DRV_NAME ": %s: clear bus master\n",
-			       pci_name(dev));
+			dev_printk(KERN_DEBUG, &dev->dev, "clear bus master\n");
 		pci_clear_master(dev);
 	}
 
 	if (!(cmd->val & PCI_COMMAND_INVALIDATE) &&
 	    (value & PCI_COMMAND_INVALIDATE)) {
 		if (unlikely(verbose_request))
-			printk(KERN_DEBUG
-			       DRV_NAME ": %s: enable memory-write-invalidate\n",
-			       pci_name(dev));
+			dev_printk(KERN_DEBUG, &dev->dev,
+				   "enable memory-write-invalidate\n");
 		err = pci_set_mwi(dev);
 		if (err) {
-			pr_warn("%s: cannot enable memory-write-invalidate (%d)\n",
-				pci_name(dev), err);
+			dev_warn(&dev->dev, "cannot enable memory-write-invalidate (%d)\n",
+				err);
 			value &= ~PCI_COMMAND_INVALIDATE;
 		}
 	} else if ((cmd->val & PCI_COMMAND_INVALIDATE) &&
 		   !(value & PCI_COMMAND_INVALIDATE)) {
 		if (unlikely(verbose_request))
-			printk(KERN_DEBUG
-			       DRV_NAME ": %s: disable memory-write-invalidate\n",
-			       pci_name(dev));
+			dev_printk(KERN_DEBUG, &dev->dev,
+				   "disable memory-write-invalidate\n");
 		pci_clear_mwi(dev);
 	}
 
@@ -157,8 +152,7 @@ static int rom_write(struct pci_dev *dev, int offset, u32 value, void *data)
 	struct pci_bar_info *bar = data;
 
 	if (unlikely(!bar)) {
-		pr_warn(DRV_NAME ": driver data not found for %s\n",
-		       pci_name(dev));
+		dev_warn(&dev->dev, "driver data not found\n");
 		return XEN_PCI_ERR_op_failed;
 	}
 
@@ -194,8 +188,7 @@ static int bar_write(struct pci_dev *dev, int offset, u32 value, void *data)
 	u32 mask;
 
 	if (unlikely(!bar)) {
-		pr_warn(DRV_NAME ": driver data not found for %s\n",
-		       pci_name(dev));
+		dev_warn(&dev->dev, "driver data not found\n");
 		return XEN_PCI_ERR_op_failed;
 	}
 
@@ -228,8 +221,7 @@ static int bar_read(struct pci_dev *dev, int offset, u32 * value, void *data)
 	struct pci_bar_info *bar = data;
 
 	if (unlikely(!bar)) {
-		pr_warn(DRV_NAME ": driver data not found for %s\n",
-		       pci_name(dev));
+		dev_warn(&dev->dev, "driver data not found\n");
 		return XEN_PCI_ERR_op_failed;
 	}
 
@@ -433,8 +425,8 @@ int xen_pcibk_config_header_add_fields(struct pci_dev *dev)
 
 	default:
 		err = -EINVAL;
-		pr_err("%s: Unsupported header type %d!\n",
-		       pci_name(dev), dev->hdr_type);
+		dev_err(&dev->dev, "Unsupported header type %d!\n",
+			dev->hdr_type);
 		break;
 	}
 
diff --git a/drivers/xen/xen-pciback/conf_space_quirks.c b/drivers/xen/xen-pciback/conf_space_quirks.c
index ed593d1042a6..7dc281086302 100644
--- a/drivers/xen/xen-pciback/conf_space_quirks.c
+++ b/drivers/xen/xen-pciback/conf_space_quirks.c
@@ -6,6 +6,8 @@
  * Author: Chris Bookholt <hap10@epoch.ncsc.mil>
  */
 
+#define dev_fmt(fmt) DRV_NAME ": " fmt
+
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include "pciback.h"
@@ -35,8 +37,8 @@ static struct xen_pcibk_config_quirk *xen_pcibk_find_quirk(struct pci_dev *dev)
 		if (match_one_device(&tmp_quirk->devid, dev) != NULL)
 			goto out;
 	tmp_quirk = NULL;
-	printk(KERN_DEBUG DRV_NAME
-	       ": quirk didn't match any device known\n");
+	dev_printk(KERN_DEBUG, &dev->dev,
+		   "quirk didn't match any device known\n");
 out:
 	return tmp_quirk;
 }
diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/pci_stub.c
index 7af93d65ed51..e876c3d6dad1 100644
--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
@@ -6,6 +6,7 @@
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#define dev_fmt pr_fmt
 
 #include <linux/module.h>
 #include <linux/init.h>
@@ -626,11 +627,11 @@ static void pcistub_remove(struct pci_dev *dev)
 		if (found_psdev->pdev) {
 			int domid = xen_find_device_domain_owner(dev);
 
-			pr_warn("****** removing device %s while still in-use by domain %d! ******\n",
+			dev_warn(&dev->dev, "****** removing device %s while still in-use by domain %d! ******\n",
 			       pci_name(found_psdev->dev), domid);
-			pr_warn("****** driver domain may still access this device's i/o resources!\n");
-			pr_warn("****** shutdown driver domain before binding device\n");
-			pr_warn("****** to other drivers or domains\n");
+			dev_warn(&dev->dev, "****** driver domain may still access this device's i/o resources!\n");
+			dev_warn(&dev->dev, "****** shutdown driver domain before binding device\n");
+			dev_warn(&dev->dev, "****** to other drivers or domains\n");
 
 			/* N.B. This ends up calling pcistub_put_pci_dev which ends up
 			 * doing the FLR. */
@@ -711,14 +712,12 @@ static pci_ers_result_t common_process(struct pcistub_device *psdev,
 	ret = xen_pcibk_get_pcifront_dev(psdev->dev, psdev->pdev,
 		&aer_op->domain, &aer_op->bus, &aer_op->devfn);
 	if (!ret) {
-		dev_err(&psdev->dev->dev,
-			DRV_NAME ": failed to get pcifront device\n");
+		dev_err(&psdev->dev->dev, "failed to get pcifront device\n");
 		return PCI_ERS_RESULT_NONE;
 	}
 	wmb();
 
-	dev_dbg(&psdev->dev->dev,
-			DRV_NAME ": aer_op %x dom %x bus %x devfn %x\n",
+	dev_dbg(&psdev->dev->dev, "aer_op %x dom %x bus %x devfn %x\n",
 			aer_cmd, aer_op->domain, aer_op->bus, aer_op->devfn);
 	/*local flag to mark there's aer request, xen_pcibk callback will use
 	* this flag to judge whether we need to check pci-front give aer
@@ -754,8 +753,7 @@ static pci_ers_result_t common_process(struct pcistub_device *psdev,
 
 	if (test_bit(_XEN_PCIF_active,
 		(unsigned long *)&sh_info->flags)) {
-		dev_dbg(&psdev->dev->dev,
-			"schedule pci_conf service in " DRV_NAME "\n");
+		dev_dbg(&psdev->dev->dev, "schedule pci_conf service\n");
 		xen_pcibk_test_and_schedule_op(psdev->pdev);
 	}
 
@@ -786,13 +784,12 @@ static pci_ers_result_t xen_pcibk_slot_reset(struct pci_dev *dev)
 				PCI_FUNC(dev->devfn));
 
 	if (!psdev || !psdev->pdev) {
-		dev_err(&dev->dev,
-			DRV_NAME " device is not found/assigned\n");
+		dev_err(&dev->dev, "device is not found/assigned\n");
 		goto end;
 	}
 
 	if (!psdev->pdev->sh_info) {
-		dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
+		dev_err(&dev->dev, "device is not connected or owned"
 			" by HVM, kill it\n");
 		kill_domain_by_device(psdev);
 		goto end;
@@ -844,13 +841,12 @@ static pci_ers_result_t xen_pcibk_mmio_enabled(struct pci_dev *dev)
 				PCI_FUNC(dev->devfn));
 
 	if (!psdev || !psdev->pdev) {
-		dev_err(&dev->dev,
-			DRV_NAME " device is not found/assigned\n");
+		dev_err(&dev->dev, "device is not found/assigned\n");
 		goto end;
 	}
 
 	if (!psdev->pdev->sh_info) {
-		dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
+		dev_err(&dev->dev, "device is not connected or owned"
 			" by HVM, kill it\n");
 		kill_domain_by_device(psdev);
 		goto end;
@@ -902,13 +898,12 @@ static pci_ers_result_t xen_pcibk_error_detected(struct pci_dev *dev,
 				PCI_FUNC(dev->devfn));
 
 	if (!psdev || !psdev->pdev) {
-		dev_err(&dev->dev,
-			DRV_NAME " device is not found/assigned\n");
+		dev_err(&dev->dev, "device is not found/assigned\n");
 		goto end;
 	}
 
 	if (!psdev->pdev->sh_info) {
-		dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
+		dev_err(&dev->dev, "device is not connected or owned"
 			" by HVM, kill it\n");
 		kill_domain_by_device(psdev);
 		goto end;
@@ -956,13 +951,12 @@ static void xen_pcibk_error_resume(struct pci_dev *dev)
 				PCI_FUNC(dev->devfn));
 
 	if (!psdev || !psdev->pdev) {
-		dev_err(&dev->dev,
-			DRV_NAME " device is not found/assigned\n");
+		dev_err(&dev->dev, "device is not found/assigned\n");
 		goto end;
 	}
 
 	if (!psdev->pdev->sh_info) {
-		dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
+		dev_err(&dev->dev, "device is not connected or owned"
 			" by HVM, kill it\n");
 		kill_domain_by_device(psdev);
 		goto end;
diff --git a/drivers/xen/xen-pciback/pciback_ops.c b/drivers/xen/xen-pciback/pciback_ops.c
index 787966f44589..8545ca78c4f1 100644
--- a/drivers/xen/xen-pciback/pciback_ops.c
+++ b/drivers/xen/xen-pciback/pciback_ops.c
@@ -6,6 +6,7 @@
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#define dev_fmt pr_fmt
 
 #include <linux/moduleparam.h>
 #include <linux/wait.h>
@@ -148,7 +149,7 @@ int xen_pcibk_enable_msi(struct xen_pcibk_device *pdev,
 	int status;
 
 	if (unlikely(verbose_request))
-		printk(KERN_DEBUG DRV_NAME ": %s: enable MSI\n", pci_name(dev));
+		dev_printk(KERN_DEBUG, &dev->dev, "enable MSI\n");
 
 	if (dev->msi_enabled)
 		status = -EALREADY;
@@ -158,9 +159,8 @@ int xen_pcibk_enable_msi(struct xen_pcibk_device *pdev,
 		status = pci_enable_msi(dev);
 
 	if (status) {
-		pr_warn_ratelimited("%s: error enabling MSI for guest %u: err %d\n",
-				    pci_name(dev), pdev->xdev->otherend_id,
-				    status);
+		dev_warn_ratelimited(&dev->dev, "error enabling MSI for guest %u: err %d\n",
+				     pdev->xdev->otherend_id, status);
 		op->value = 0;
 		return XEN_PCI_ERR_op_failed;
 	}
@@ -170,8 +170,7 @@ int xen_pcibk_enable_msi(struct xen_pcibk_device *pdev,
 
 	op->value = dev->irq ? xen_pirq_from_irq(dev->irq) : 0;
 	if (unlikely(verbose_request))
-		printk(KERN_DEBUG DRV_NAME ": %s: MSI: %d\n", pci_name(dev),
-			op->value);
+		dev_printk(KERN_DEBUG, &dev->dev, "MSI: %d\n", op->value);
 
 	dev_data = pci_get_drvdata(dev);
 	if (dev_data)
@@ -185,8 +184,7 @@ int xen_pcibk_disable_msi(struct xen_pcibk_device *pdev,
 			  struct pci_dev *dev, struct xen_pci_op *op)
 {
 	if (unlikely(verbose_request))
-		printk(KERN_DEBUG DRV_NAME ": %s: disable MSI\n",
-		       pci_name(dev));
+		dev_printk(KERN_DEBUG, &dev->dev, "disable MSI\n");
 
 	if (dev->msi_enabled) {
 		struct xen_pcibk_dev_data *dev_data;
@@ -199,8 +197,7 @@ int xen_pcibk_disable_msi(struct xen_pcibk_device *pdev,
 	}
 	op->value = dev->irq ? xen_pirq_from_irq(dev->irq) : 0;
 	if (unlikely(verbose_request))
-		printk(KERN_DEBUG DRV_NAME ": %s: MSI: %d\n", pci_name(dev),
-			op->value);
+		dev_printk(KERN_DEBUG, &dev->dev, "MSI: %d\n", op->value);
 	return 0;
 }
 
@@ -214,8 +211,7 @@ int xen_pcibk_enable_msix(struct xen_pcibk_device *pdev,
 	u16 cmd;
 
 	if (unlikely(verbose_request))
-		printk(KERN_DEBUG DRV_NAME ": %s: enable MSI-X\n",
-		       pci_name(dev));
+		dev_printk(KERN_DEBUG, &dev->dev, "enable MSI-X\n");
 
 	if (op->value > SH_INFO_MAX_VEC)
 		return -EINVAL;
@@ -249,16 +245,14 @@ int xen_pcibk_enable_msix(struct xen_pcibk_device *pdev,
 				op->msix_entries[i].vector =
 					xen_pirq_from_irq(entries[i].vector);
 				if (unlikely(verbose_request))
-					printk(KERN_DEBUG DRV_NAME ": %s: " \
-						"MSI-X[%d]: %d\n",
-						pci_name(dev), i,
+					dev_printk(KERN_DEBUG, &dev->dev,
+						"MSI-X[%d]: %d\n", i,
 						op->msix_entries[i].vector);
 			}
 		}
 	} else
-		pr_warn_ratelimited("%s: error enabling MSI-X for guest %u: err %d!\n",
-				    pci_name(dev), pdev->xdev->otherend_id,
-				    result);
+		dev_warn_ratelimited(&dev->dev, "error enabling MSI-X for guest %u: err %d!\n",
+				     pdev->xdev->otherend_id, result);
 	kfree(entries);
 
 	op->value = result;
@@ -274,8 +268,7 @@ int xen_pcibk_disable_msix(struct xen_pcibk_device *pdev,
 			   struct pci_dev *dev, struct xen_pci_op *op)
 {
 	if (unlikely(verbose_request))
-		printk(KERN_DEBUG DRV_NAME ": %s: disable MSI-X\n",
-			pci_name(dev));
+		dev_printk(KERN_DEBUG, &dev->dev, "disable MSI-X\n");
 
 	if (dev->msix_enabled) {
 		struct xen_pcibk_dev_data *dev_data;
@@ -292,8 +285,7 @@ int xen_pcibk_disable_msix(struct xen_pcibk_device *pdev,
 	 */
 	op->value = dev->irq ? xen_pirq_from_irq(dev->irq) : 0;
 	if (unlikely(verbose_request))
-		printk(KERN_DEBUG DRV_NAME ": %s: MSI-X: %d\n",
-		       pci_name(dev), op->value);
+		dev_printk(KERN_DEBUG, &dev->dev, "MSI-X: %d\n", op->value);
 	return 0;
 }
 #endif
@@ -424,7 +416,7 @@ static irqreturn_t xen_pcibk_guest_interrupt(int irq, void *dev_id)
 		dev_data->handled++;
 		if ((dev_data->handled % 1000) == 0) {
 			if (xen_test_irq_shared(irq)) {
-				pr_info("%s IRQ line is not shared "
+				dev_info(&dev->dev, "%s IRQ line is not shared "
 					"with other domains. Turning ISR off\n",
 					 dev_data->irq_name);
 				dev_data->ack_intr = 0;
diff --git a/drivers/xen/xen-pciback/vpci.c b/drivers/xen/xen-pciback/vpci.c
index f6ba18191c0f..5447b5ab7c76 100644
--- a/drivers/xen/xen-pciback/vpci.c
+++ b/drivers/xen/xen-pciback/vpci.c
@@ -7,6 +7,7 @@
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#define dev_fmt pr_fmt
 
 #include <linux/list.h>
 #include <linux/slab.h>
@@ -105,9 +106,8 @@ static int __xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev,
 				       struct pci_dev_entry, list);
 
 			if (match_slot(dev, t->dev)) {
-				pr_info("vpci: %s: assign to virtual slot %d func %d\n",
-					pci_name(dev), slot,
-					PCI_FUNC(dev->devfn));
+				dev_info(&dev->dev, "vpci: assign to virtual slot %d func %d\n",
+					 slot, PCI_FUNC(dev->devfn));
 				list_add_tail(&dev_entry->list,
 					      &vpci_dev->dev_list[slot]);
 				func = PCI_FUNC(dev->devfn);
@@ -119,8 +119,8 @@ static int __xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev,
 	/* Assign to a new slot on the virtual PCI bus */
 	for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
 		if (list_empty(&vpci_dev->dev_list[slot])) {
-			pr_info("vpci: %s: assign to virtual slot %d\n",
-				pci_name(dev), slot);
+			dev_info(&dev->dev, "vpci: assign to virtual slot %d\n",
+				 slot);
 			list_add_tail(&dev_entry->list,
 				      &vpci_dev->dev_list[slot]);
 			func = dev->is_virtfn ? 0 : PCI_FUNC(dev->devfn);
-- 
2.25.1

[PATCH 2/2] xenbus: Use dev_printk() when possible

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

Use dev_printk() when possible to include device and driver information in
the conventional format.

Add "#define dev_fmt" to preserve KBUILD_MODNAME in messages.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/xen/xenbus/xenbus_probe.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
index 8c4d05b687b7..ee9a9170b43a 100644
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -31,6 +31,7 @@
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#define dev_fmt pr_fmt
 
 #define DPRINTK(fmt, args...)				\
 	pr_debug("xenbus_probe (%s:%d) " fmt ".\n",	\
@@ -608,7 +609,7 @@ int xenbus_dev_suspend(struct device *dev)
 	if (drv->suspend)
 		err = drv->suspend(xdev);
 	if (err)
-		pr_warn("suspend %s failed: %i\n", dev_name(dev), err);
+		dev_warn(dev, "suspend failed: %i\n", err);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(xenbus_dev_suspend);
@@ -627,8 +628,7 @@ int xenbus_dev_resume(struct device *dev)
 	drv = to_xenbus_driver(dev->driver);
 	err = talk_to_otherend(xdev);
 	if (err) {
-		pr_warn("resume (talk_to_otherend) %s failed: %i\n",
-			dev_name(dev), err);
+		dev_warn(dev, "resume (talk_to_otherend) failed: %i\n", err);
 		return err;
 	}
 
@@ -637,15 +637,14 @@ int xenbus_dev_resume(struct device *dev)
 	if (drv->resume) {
 		err = drv->resume(xdev);
 		if (err) {
-			pr_warn("resume %s failed: %i\n", dev_name(dev), err);
+			dev_warn(dev, "resume failed: %i\n", err);
 			return err;
 		}
 	}
 
 	err = watch_otherend(xdev);
 	if (err) {
-		pr_warn("resume (watch_otherend) %s failed: %d.\n",
-			dev_name(dev), err);
+		dev_warn(dev, "resume (watch_otherend) failed: %d\n", err);
 		return err;
 	}
 
-- 
2.25.1

Re: [PATCH 1/2] xen-pciback: Use dev_printk() when possible

[Boris Ostrovsky]

On 5/27/20 1:43 PM, Bjorn Helgaas wrote:
> @@ -155,8 +157,8 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
>  	u32 value = 0, tmp_val;
>  
>  	if (unlikely(verbose_request))
> -		printk(KERN_DEBUG DRV_NAME ": %s: read %d bytes at 0x%x\n",
> -		       pci_name(dev), size, offset);
> +		dev_printk(KERN_DEBUG, &dev->dev, "read %d bytes at 0x%x\n",
> +			   size, offset);


Maybe then dev_dbg() ?


-boris

Re: [PATCH 2/2] xenbus: Use dev_printk() when possible

[Boris Ostrovsky]

On 5/27/20 1:43 PM, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@google.com>
>
> Use dev_printk() when possible to include device and driver information in
> the conventional format.
>
> Add "#define dev_fmt" to preserve KBUILD_MODNAME in messages.
>
> No functional change intended.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>


Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

Re: [PATCH 1/2] xen-pciback: Use dev_printk() when possible

[Bjorn Helgaas]

On Wed, May 27, 2020 at 03:34:26PM -0700, Boris Ostrovsky wrote:
> On 5/27/20 1:43 PM, Bjorn Helgaas wrote:
> > @@ -155,8 +157,8 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
> >  	u32 value = 0, tmp_val;
> >  
> >  	if (unlikely(verbose_request))
> > -		printk(KERN_DEBUG DRV_NAME ": %s: read %d bytes at 0x%x\n",
> > -		       pci_name(dev), size, offset);
> > +		dev_printk(KERN_DEBUG, &dev->dev, "read %d bytes at 0x%x\n",
> > +			   size, offset);
> 
> 
> Maybe then dev_dbg() ?

printk(KERN_DEBUG) always produces output, so I used
dev_printk(KERN_DEBUG) to retain that behavior.

dev_dbg() does not always produce output, since it depends on DEBUG or
CONFIG_DYNAMIC_DEBUG and the dynamic debug settings.

If dev_dbg() seems like the right thing, I would probably add a
separate patch on top to convert dev_printk(KERN_DEBUG) to dev_dbg().

Thanks for taking a look!  

Bjorn

Re: [PATCH 1/2] xen-pciback: Use dev_printk() when possible

[Boris Ostrovsky]

On 5/27/20 6:50 PM, Bjorn Helgaas wrote:
> On Wed, May 27, 2020 at 03:34:26PM -0700, Boris Ostrovsky wrote:
>> On 5/27/20 1:43 PM, Bjorn Helgaas wrote:
>>> @@ -155,8 +157,8 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
>>>  	u32 value = 0, tmp_val;
>>>  
>>>  	if (unlikely(verbose_request))
>>> -		printk(KERN_DEBUG DRV_NAME ": %s: read %d bytes at 0x%x\n",
>>> -		       pci_name(dev), size, offset);
>>> +		dev_printk(KERN_DEBUG, &dev->dev, "read %d bytes at 0x%x\n",
>>> +			   size, offset);
>>
>> Maybe then dev_dbg() ?
> printk(KERN_DEBUG) always produces output, so I used
> dev_printk(KERN_DEBUG) to retain that behavior.
>
> dev_dbg() does not always produce output, since it depends on DEBUG or
> CONFIG_DYNAMIC_DEBUG and the dynamic debug settings.


Oh, I didn't realize it needs either of these.


>
> If dev_dbg() seems like the right thing, I would probably add a
> separate patch on top to convert dev_printk(KERN_DEBUG) to dev_dbg().


I think anyone who wants to see those messages ought to have at least
CONFIG_DYNAMIC_DEBUG, especially since they are under verbose_request
(which also should go away IMO). In fact, I wonder whether this code
predates dynamic debugging, it's been there for almost 10 years.


I'll leave it to you whether you want to add another patch.


Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

Re: [PATCH 1/2] xen-pciback: Use dev_printk() when possible

[Joe Perches]

On Wed, 2020-05-27 at 15:34 -0700, Boris Ostrovsky wrote:
> On 5/27/20 1:43 PM, Bjorn Helgaas wrote:
> > @@ -155,8 +157,8 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
> >  	u32 value = 0, tmp_val;
> >  
> >  	if (unlikely(verbose_request))
> > -		printk(KERN_DEBUG DRV_NAME ": %s: read %d bytes at 0x%x\n",
> > -		       pci_name(dev), size, offset);
> > +		dev_printk(KERN_DEBUG, &dev->dev, "read %d bytes at 0x%x\n",
> > +			   size, offset);
> 
> Maybe then dev_dbg() ?

It likely would be better to remove verbose_request altogether
and just use dynamic debugging and dev_dbg for all the output.

$ git grep -w -A3 verbose_request
drivers/pci/xen-pcifront.c:static int verbose_request;
drivers/pci/xen-pcifront.c:module_param(verbose_request, int, 0644);
drivers/pci/xen-pcifront.c-
drivers/pci/xen-pcifront.c-static int errno_to_pcibios_err(int errno)
drivers/pci/xen-pcifront.c-{
--
drivers/pci/xen-pcifront.c:	if (verbose_request)
drivers/pci/xen-pcifront.c-		dev_info(&pdev->xdev->dev,
drivers/pci/xen-pcifront.c-			 "read dev=%04x:%02x:%02x.%d - offset %x size %d\n",
drivers/pci/xen-pcifront.c-			 pci_domain_nr(bus), bus->number, PCI_SLOT(devfn),
--
drivers/pci/xen-pcifront.c:		if (verbose_request)
drivers/pci/xen-pcifront.c-			dev_info(&pdev->xdev->dev, "read got back value %x\n",
drivers/pci/xen-pcifront.c-				 op.value);
drivers/pci/xen-pcifront.c-
--
drivers/pci/xen-pcifront.c:	if (verbose_request)
drivers/pci/xen-pcifront.c-		dev_info(&pdev->xdev->dev,
drivers/pci/xen-pcifront.c-			 "write dev=%04x:%02x:%02x.%d - "
drivers/pci/xen-pcifront.c-			 "offset %x size %d val %x\n",
--
drivers/xen/xen-pciback/conf_space.c:	if (unlikely(verbose_request))
drivers/xen/xen-pciback/conf_space.c-		printk(KERN_DEBUG DRV_NAME ": %s: read %d bytes at 0x%x\n",
drivers/xen/xen-pciback/conf_space.c-		       pci_name(dev), size, offset);
drivers/xen/xen-pciback/conf_space.c-
--
drivers/xen/xen-pciback/conf_space.c:	if (unlikely(verbose_request))
drivers/xen/xen-pciback/conf_space.c-		printk(KERN_DEBUG DRV_NAME ": %s: read %d bytes at 0x%x = %x\n",
drivers/xen/xen-pciback/conf_space.c-		       pci_name(dev), size, offset, value);
drivers/xen/xen-pciback/conf_space.c-
--
drivers/xen/xen-pciback/conf_space.c:	if (unlikely(verbose_request))
drivers/xen/xen-pciback/conf_space.c-		printk(KERN_DEBUG
drivers/xen/xen-pciback/conf_space.c-		       DRV_NAME ": %s: write request %d bytes at 0x%x = %x\n",
drivers/xen/xen-pciback/conf_space.c-		       pci_name(dev), size, offset, value);
--
drivers/xen/xen-pciback/conf_space_header.c:		if (unlikely(verbose_request))
drivers/xen/xen-pciback/conf_space_header.c-			printk(KERN_DEBUG DRV_NAME ": %s: enable\n",
drivers/xen/xen-pciback/conf_space_header.c-			       pci_name(dev));
drivers/xen/xen-pciback/conf_space_header.c-		err = pci_enable_device(dev);
--
drivers/xen/xen-pciback/conf_space_header.c:		if (unlikely(verbose_request))
drivers/xen/xen-pciback/conf_space_header.c-			printk(KERN_DEBUG DRV_NAME ": %s: disable\n",
drivers/xen/xen-pciback/conf_space_header.c-			       pci_name(dev));
drivers/xen/xen-pciback/conf_space_header.c-		pci_disable_device(dev);
--
drivers/xen/xen-pciback/conf_space_header.c:		if (unlikely(verbose_request))
drivers/xen/xen-pciback/conf_space_header.c-			printk(KERN_DEBUG DRV_NAME ": %s: set bus master\n",
drivers/xen/xen-pciback/conf_space_header.c-			       pci_name(dev));
drivers/xen/xen-pciback/conf_space_header.c-		pci_set_master(dev);
--
drivers/xen/xen-pciback/conf_space_header.c:		if (unlikely(verbose_request))
drivers/xen/xen-pciback/conf_space_header.c-			printk(KERN_DEBUG DRV_NAME ": %s: clear bus master\n",
drivers/xen/xen-pciback/conf_space_header.c-			       pci_name(dev));
drivers/xen/xen-pciback/conf_space_header.c-		pci_clear_master(dev);
--
drivers/xen/xen-pciback/conf_space_header.c:		if (unlikely(verbose_request))
drivers/xen/xen-pciback/conf_space_header.c-			printk(KERN_DEBUG
drivers/xen/xen-pciback/conf_space_header.c-			       DRV_NAME ": %s: enable memory-write-invalidate\n",
drivers/xen/xen-pciback/conf_space_header.c-			       pci_name(dev));
--
drivers/xen/xen-pciback/conf_space_header.c:		if (unlikely(verbose_request))
drivers/xen/xen-pciback/conf_space_header.c-			printk(KERN_DEBUG
drivers/xen/xen-pciback/conf_space_header.c-			       DRV_NAME ": %s: disable memory-write-invalidate\n",
drivers/xen/xen-pciback/conf_space_header.c-			       pci_name(dev));
--
drivers/xen/xen-pciback/pciback.h:extern int verbose_request;
drivers/xen/xen-pciback/pciback.h-
drivers/xen/xen-pciback/pciback.h-void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev);
drivers/xen/xen-pciback/pciback.h-#endif
--
drivers/xen/xen-pciback/pciback_ops.c:int verbose_request;
drivers/xen/xen-pciback/pciback_ops.c:module_param(verbose_request, int, 0644);
drivers/xen/xen-pciback/pciback_ops.c-
drivers/xen/xen-pciback/pciback_ops.c-static irqreturn_t xen_pcibk_guest_interrupt(int irq, void *dev_id);
drivers/xen/xen-pciback/pciback_ops.c-
--
drivers/xen/xen-pciback/pciback_ops.c:	if (unlikely(verbose_request))
drivers/xen/xen-pciback/pciback_ops.c-		printk(KERN_DEBUG DRV_NAME ": %s: enable MSI\n", pci_name(dev));
drivers/xen/xen-pciback/pciback_ops.c-
drivers/xen/xen-pciback/pciback_ops.c-	if (dev->msi_enabled)
--
drivers/xen/xen-pciback/pciback_ops.c:	if (unlikely(verbose_request))
drivers/xen/xen-pciback/pciback_ops.c-		printk(KERN_DEBUG DRV_NAME ": %s: MSI: %d\n", pci_name(dev),
drivers/xen/xen-pciback/pciback_ops.c-			op->value);
drivers/xen/xen-pciback/pciback_ops.c-
--
drivers/xen/xen-pciback/pciback_ops.c:	if (unlikely(verbose_request))
drivers/xen/xen-pciback/pciback_ops.c-		printk(KERN_DEBUG DRV_NAME ": %s: disable MSI\n",
drivers/xen/xen-pciback/pciback_ops.c-		       pci_name(dev));
drivers/xen/xen-pciback/pciback_ops.c-
--
drivers/xen/xen-pciback/pciback_ops.c:	if (unlikely(verbose_request))
drivers/xen/xen-pciback/pciback_ops.c-		printk(KERN_DEBUG DRV_NAME ": %s: MSI: %d\n", pci_name(dev),
drivers/xen/xen-pciback/pciback_ops.c-			op->value);
drivers/xen/xen-pciback/pciback_ops.c-	return 0;
--
drivers/xen/xen-pciback/pciback_ops.c:	if (unlikely(verbose_request))
drivers/xen/xen-pciback/pciback_ops.c-		printk(KERN_DEBUG DRV_NAME ": %s: enable MSI-X\n",
drivers/xen/xen-pciback/pciback_ops.c-		       pci_name(dev));
drivers/xen/xen-pciback/pciback_ops.c-
--
drivers/xen/xen-pciback/pciback_ops.c:				if (unlikely(verbose_request))
drivers/xen/xen-pciback/pciback_ops.c-					printk(KERN_DEBUG DRV_NAME ": %s: " \
drivers/xen/xen-pciback/pciback_ops.c-						"MSI-X[%d]: %d\n",
drivers/xen/xen-pciback/pciback_ops.c-						pci_name(dev), i,
--
drivers/xen/xen-pciback/pciback_ops.c:	if (unlikely(verbose_request))
drivers/xen/xen-pciback/pciback_ops.c-		printk(KERN_DEBUG DRV_NAME ": %s: disable MSI-X\n",
drivers/xen/xen-pciback/pciback_ops.c-			pci_name(dev));
drivers/xen/xen-pciback/pciback_ops.c-
--
drivers/xen/xen-pciback/pciback_ops.c:	if (unlikely(verbose_request))
drivers/xen/xen-pciback/pciback_ops.c-		printk(KERN_DEBUG DRV_NAME ": %s: MSI-X: %d\n",
drivers/xen/xen-pciback/pciback_ops.c-		       pci_name(dev), op->value);
drivers/xen/xen-pciback/pciback_ops.c-	return 0;