[PATCH 5/8] staging: gasket: core: add subsystem and device info to error logs

[Todd Poynor <toddpoynor@gmail.com>]

From: Todd Poynor <toddpoynor@google.com>

Identify gasket as the subsystem printing various error messages.
Add the driver name to appropriate messages to indicate which driver
has a problem.

Signed-off-by: Todd Poynor <toddpoynor@google.com>
---
 drivers/staging/gasket/gasket_core.c | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/gasket/gasket_core.c b/drivers/staging/gasket/gasket_core.c
index 36c077fffc41c..19331feb9b09f 100644
--- a/drivers/staging/gasket/gasket_core.c
+++ b/drivers/staging/gasket/gasket_core.c
@@ -160,7 +160,7 @@ static int gasket_find_dev_slot(struct gasket_internal_desc *internal_desc,
 	for (i = 0; i < GASKET_DEV_MAX; i++) {
 		if (internal_desc->devs[i] &&
 		    strcmp(internal_desc->devs[i]->kobj_name, kobj_name) == 0) {
-			pr_err("Duplicate device %s\n", kobj_name);
+			pr_err("gasket: Duplicate device %s\n", kobj_name);
 			mutex_unlock(&internal_desc->mutex);
 			return -EBUSY;
 		}
@@ -173,7 +173,8 @@ static int gasket_find_dev_slot(struct gasket_internal_desc *internal_desc,
 	}
 
 	if (i == GASKET_DEV_MAX) {
-		pr_err("Too many registered devices; max %d\n", GASKET_DEV_MAX);
+		pr_err("gasket: Too many registered devices, max %d\n",
+		       GASKET_DEV_MAX);
 		mutex_unlock(&internal_desc->mutex);
 		return -EBUSY;
 	}
@@ -208,7 +209,7 @@ static int gasket_alloc_dev(struct gasket_internal_desc *internal_desc,
 
 	gasket_dev = *pdev = kzalloc(sizeof(*gasket_dev), GFP_KERNEL);
 	if (!gasket_dev) {
-		pr_err("no memory for device\n");
+		pr_err("gasket: no memory for device %s\n",  kobj_name);
 		return -ENOMEM;
 	}
 	internal_desc->devs[dev_idx] = gasket_dev;
@@ -1464,7 +1465,7 @@ static int gasket_pci_probe(struct pci_dev *pci_dev,
 	internal_desc = lookup_internal_desc(pci_dev);
 	mutex_unlock(&g_mutex);
 	if (!internal_desc) {
-		pr_err("PCI probe called for unknown driver type\n");
+		pr_err("gasket: PCI probe called for unknown driver type\n");
 		return -ENODEV;
 	}
 
@@ -1476,7 +1477,7 @@ static int gasket_pci_probe(struct pci_dev *pci_dev,
 		return ret;
 	gasket_dev->pci_dev = pci_dev_get(pci_dev);
 	if (IS_ERR_OR_NULL(gasket_dev->dev_info.device)) {
-		pr_err("Cannot create %s device %s [ret = %ld]\n",
+		pr_err("gasket: Cannot create %s device %s [ret = %ld]\n",
 		       driver_desc->name, gasket_dev->dev_info.name,
 		       PTR_ERR(gasket_dev->dev_info.device));
 		ret = -ENODEV;
@@ -1523,7 +1524,7 @@ static int gasket_pci_probe(struct pci_dev *pci_dev,
 
 	ret = gasket_enable_dev(internal_desc, gasket_dev);
 	if (ret) {
-		pr_err("cannot setup %s device\n", driver_desc->name);
+		pr_err("gasket: cannot setup %s device\n", driver_desc->name);
 		gasket_disable_dev(gasket_dev);
 		goto fail5;
 	}
@@ -1743,7 +1744,7 @@ int gasket_register_device(const struct gasket_driver_desc *driver_desc)
 
 	for (i = 0; i < GASKET_FRAMEWORK_DESC_MAX; i++) {
 		if (g_descs[i].driver_desc == driver_desc) {
-			pr_err("%s driver already loaded/registered\n",
+			pr_err("gasket: %s driver already loaded/registered\n",
 			       driver_desc->name);
 			mutex_unlock(&g_mutex);
 			return -EBUSY;
@@ -1761,7 +1762,7 @@ int gasket_register_device(const struct gasket_driver_desc *driver_desc)
 	mutex_unlock(&g_mutex);
 
 	if (desc_idx == -1) {
-		pr_err("Too many Gasket drivers loaded: %d\n",
+		pr_err("gasket: too many drivers loaded, max %d\n",
 		       GASKET_FRAMEWORK_DESC_MAX);
 		return -EBUSY;
 	}
@@ -1778,7 +1779,7 @@ int gasket_register_device(const struct gasket_driver_desc *driver_desc)
 		class_create(driver_desc->module, driver_desc->name);
 
 	if (IS_ERR(internal->class)) {
-		pr_err("Cannot register %s class [ret=%ld]\n",
+		pr_err("gasket: Cannot register %s class [ret=%ld]\n",
 		       driver_desc->name, PTR_ERR(internal->class));
 		ret = PTR_ERR(internal->class);
 		goto unregister_gasket_driver;
@@ -1791,7 +1792,8 @@ int gasket_register_device(const struct gasket_driver_desc *driver_desc)
 	ret = __pci_register_driver(&internal->pci, driver_desc->module,
 				    driver_desc->name);
 	if (ret) {
-		pr_err("cannot register pci driver [ret=%d]\n", ret);
+		pr_err("gasket: cannot register %s pci driver [ret=%d]\n",
+		       driver_desc->name, ret);
 		goto fail1;
 	}
 
@@ -1799,7 +1801,8 @@ int gasket_register_device(const struct gasket_driver_desc *driver_desc)
 					   driver_desc->minor), GASKET_DEV_MAX,
 				     driver_desc->name);
 	if (ret) {
-		pr_err("cannot register char driver [ret=%d]\n", ret);
+		pr_err("gasket: cannot register %s char driver [ret=%d]\n",
+		       driver_desc->name, ret);
 		goto fail2;
 	}
 
@@ -1840,7 +1843,7 @@ void gasket_unregister_device(const struct gasket_driver_desc *driver_desc)
 	mutex_unlock(&g_mutex);
 
 	if (!internal_desc) {
-		pr_err("request to unregister unknown desc: %s, %d:%d\n",
+		pr_err("gasket: request to unregister unknown desc: %s, %d:%d\n",
 		       driver_desc->name, driver_desc->major,
 		       driver_desc->minor);
 		return;
-- 
2.18.0.597.ga71716f1ad-goog