[PATCH v3 0/5] staging: vme_user: Remove printk's & clean up log messages

[PATCH v3 0/5] staging: vme_user: Remove printk's & clean up log messages

[Soumya Negi]

Staging driver vme_user has a bunch of printk() calls in vme.c which
triggers checkpatch warnings. Remove all printk's by either changing
them to the appropriate logging mechanism i.e dev_err()/dev_warn() or
by dropping the unneeded printk's.

Also, clean up the messages further by using __func__ in the string
instead of function names.

This patchset fixes all checkpatch warnings like:

    WARNING: Prefer [subsystem eg: netdev]_err([subsystem]dev, ... then
             dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
&
    WARNING: Prefer using '"%s...", __func__' to using 'vme_lm_get',
             this function's name, in a string

Patches must be applied in order.

Changes in v3:
 1. Patch 1: Use only dev_err() to replace printk(). v2 replaced some
    of the printk's using pr_err(). Leave the calls as printk's. New 
    patches added in v3 handle these printk's. 
    (as per feedback from gregkh@linuxfoundation.org)
 2. Added Patch 3: Remove unneeded printk.
    (suggested by gregkh@linuxfoundation.org)
 3. Added Patch 4: Remove NULL-checks for bridge device & resource.
    Corresponding printk's(part of the check blocks) are removed too.
    (as per feedback from gregkh@linuxfoundation.org)
 4. Added Patch 5: Replace printk with dev_err() in vme_check_window()
    Since vme_check_window() doesn't have access to bridge device, pass
    the bridge pointer to it.
    (suggested by gregkh@linuxfoundation.org) 
 5. Edit cover letter subject & body according to patches added in v3.

Changes in v2:
 1. Correct "cleanup" to "clean up" in cover letter.   (as per feedback
    from julia.lawall@inria.fr)
 2. Patch 1: Change the pr_*() calls used to replace printk's in v1 to 
    dev_*() wherever possible, as it adds more context to the messages.
    (as per feedback from julia.lawall@inria.fr & 
    gregkh@linuxfoundation.org)

Soumya Negi (5):
  staging: vme_user: Replace printk() with dev_*()
  staging: vme_user: Use __func__ instead of function name
  staging: vme_user: Remove printk() in find_bridge()
  staging: vme_user: Remove NULL-checks
  staging: vme_user: Use dev_err() in vme_check_window()

 drivers/staging/vme_user/vme.c | 222 ++++++++++++++++-----------------
 drivers/staging/vme_user/vme.h |   4 +-
 2 files changed, 108 insertions(+), 118 deletions(-)

-- 
2.42.0

[PATCH v3 1/5] staging: vme_user: Replace printk() with dev_*()

[Soumya Negi]

vme.c uses printk() to log messages. To improve and standardize message
formatting, use logging mechanisms dev_err()/dev_warn() instead. Retain
the printk log levels of the messages during replacement.

Issue found by checkpatch.pl

Signed-off-by: Soumya Negi <soumya.negi97@gmail.com>
Acked-by: Andi Shyti <andi.shyti@linux.intel.com>
---
 drivers/staging/vme_user/vme.c | 175 +++++++++++++++++++--------------
 1 file changed, 99 insertions(+), 76 deletions(-)

diff --git a/drivers/staging/vme_user/vme.c b/drivers/staging/vme_user/vme.c
index 6519a7c994a0..25f3cac641ed 100644
--- a/drivers/staging/vme_user/vme.c
+++ b/drivers/staging/vme_user/vme.c
@@ -100,8 +100,9 @@ void *vme_alloc_consistent(struct vme_resource *resource, size_t size,
 	}
 
 	if (!bridge->alloc_consistent) {
-		printk(KERN_ERR "alloc_consistent not supported by bridge %s\n",
-		       bridge->name);
+		dev_err(bridge->parent,
+			"alloc_consistent not supported by bridge %s\n",
+			bridge->name);
 		return NULL;
 	}
 
@@ -140,8 +141,9 @@ void vme_free_consistent(struct vme_resource *resource, size_t size,
 	}
 
 	if (!bridge->free_consistent) {
-		printk(KERN_ERR "free_consistent not supported by bridge %s\n",
-		       bridge->name);
+		dev_err(bridge->parent,
+			"free_consistent not supported by bridge %s\n",
+			bridge->name);
 		return;
 	}
 
@@ -161,6 +163,7 @@ EXPORT_SYMBOL(vme_free_consistent);
  */
 size_t vme_get_size(struct vme_resource *resource)
 {
+	struct vme_bridge *bridge = find_bridge(resource);
 	int enabled, retval;
 	unsigned long long base, size;
 	dma_addr_t buf_base;
@@ -184,7 +187,7 @@ size_t vme_get_size(struct vme_resource *resource)
 	case VME_DMA:
 		return 0;
 	default:
-		printk(KERN_ERR "Unknown resource type\n");
+		dev_err(bridge->parent, "Unknown resource type\n");
 		return 0;
 	}
 }
@@ -288,14 +291,15 @@ struct vme_resource *vme_slave_request(struct vme_dev *vdev, u32 address,
 
 	bridge = vdev->bridge;
 	if (!bridge) {
-		printk(KERN_ERR "Can't find VME bus\n");
+		dev_err(&vdev->dev, "Can't find VME bus\n");
 		goto err_bus;
 	}
 
 	/* Loop through slave resources */
 	list_for_each_entry(slave_image, &bridge->slave_resources, list) {
 		if (!slave_image) {
-			printk(KERN_ERR "Registered NULL Slave resource\n");
+			dev_err(bridge->parent,
+				"Registered NULL Slave resource\n");
 			continue;
 		}
 
@@ -362,20 +366,20 @@ int vme_slave_set(struct vme_resource *resource, int enabled,
 	int retval;
 
 	if (resource->type != VME_SLAVE) {
-		printk(KERN_ERR "Not a slave resource\n");
+		dev_err(bridge->parent, "Not a slave resource\n");
 		return -EINVAL;
 	}
 
 	image = list_entry(resource->entry, struct vme_slave_resource, list);
 
 	if (!bridge->slave_set) {
-		printk(KERN_ERR "Function not supported\n");
+		dev_err(bridge->parent, "Function not supported\n");
 		return -ENOSYS;
 	}
 
 	if (!(((image->address_attr & aspace) == aspace) &&
 	      ((image->cycle_attr & cycle) == cycle))) {
-		printk(KERN_ERR "Invalid attributes\n");
+		dev_err(bridge->parent, "Invalid attributes\n");
 		return -EINVAL;
 	}
 
@@ -411,14 +415,14 @@ int vme_slave_get(struct vme_resource *resource, int *enabled,
 	struct vme_slave_resource *image;
 
 	if (resource->type != VME_SLAVE) {
-		printk(KERN_ERR "Not a slave resource\n");
+		dev_err(bridge->parent, "Not a slave resource\n");
 		return -EINVAL;
 	}
 
 	image = list_entry(resource->entry, struct vme_slave_resource, list);
 
 	if (!bridge->slave_get) {
-		printk(KERN_ERR "vme_slave_get not supported\n");
+		dev_err(bridge->parent, "vme_slave_get not supported\n");
 		return -EINVAL;
 	}
 
@@ -435,24 +439,25 @@ EXPORT_SYMBOL(vme_slave_get);
  */
 void vme_slave_free(struct vme_resource *resource)
 {
+	struct vme_bridge *bridge = find_bridge(resource);
 	struct vme_slave_resource *slave_image;
 
 	if (resource->type != VME_SLAVE) {
-		printk(KERN_ERR "Not a slave resource\n");
+		dev_err(bridge->parent, "Not a slave resource\n");
 		return;
 	}
 
 	slave_image = list_entry(resource->entry, struct vme_slave_resource,
 				 list);
 	if (!slave_image) {
-		printk(KERN_ERR "Can't find slave resource\n");
+		dev_err(bridge->parent, "Can't find slave resource\n");
 		return;
 	}
 
 	/* Unlock image */
 	mutex_lock(&slave_image->mtx);
 	if (slave_image->locked == 0)
-		printk(KERN_ERR "Image is already free\n");
+		dev_err(bridge->parent, "Image is already free\n");
 
 	slave_image->locked = 0;
 	mutex_unlock(&slave_image->mtx);
@@ -484,14 +489,15 @@ struct vme_resource *vme_master_request(struct vme_dev *vdev, u32 address,
 
 	bridge = vdev->bridge;
 	if (!bridge) {
-		printk(KERN_ERR "Can't find VME bus\n");
+		dev_err(&vdev->dev, "Can't find VME bus\n");
 		goto err_bus;
 	}
 
 	/* Loop through master resources */
 	list_for_each_entry(master_image, &bridge->master_resources, list) {
 		if (!master_image) {
-			printk(KERN_WARNING "Registered NULL master resource\n");
+			dev_warn(bridge->parent,
+				 "Registered NULL master resource\n");
 			continue;
 		}
 
@@ -511,7 +517,7 @@ struct vme_resource *vme_master_request(struct vme_dev *vdev, u32 address,
 
 	/* Check to see if we found a resource */
 	if (!allocated_image) {
-		printk(KERN_ERR "Can't find a suitable resource\n");
+		dev_err(&vdev->dev, "Can't find a suitable resource\n");
 		goto err_image;
 	}
 
@@ -561,21 +567,21 @@ int vme_master_set(struct vme_resource *resource, int enabled,
 	int retval;
 
 	if (resource->type != VME_MASTER) {
-		printk(KERN_ERR "Not a master resource\n");
+		dev_err(bridge->parent, "Not a master resource\n");
 		return -EINVAL;
 	}
 
 	image = list_entry(resource->entry, struct vme_master_resource, list);
 
 	if (!bridge->master_set) {
-		printk(KERN_WARNING "vme_master_set not supported\n");
+		dev_warn(bridge->parent, "vme_master_set not supported\n");
 		return -EINVAL;
 	}
 
 	if (!(((image->address_attr & aspace) == aspace) &&
 	      ((image->cycle_attr & cycle) == cycle) &&
 	      ((image->width_attr & dwidth) == dwidth))) {
-		printk(KERN_WARNING "Invalid attributes\n");
+		dev_warn(bridge->parent, "Invalid attributes\n");
 		return -EINVAL;
 	}
 
@@ -611,14 +617,14 @@ int vme_master_get(struct vme_resource *resource, int *enabled,
 	struct vme_master_resource *image;
 
 	if (resource->type != VME_MASTER) {
-		printk(KERN_ERR "Not a master resource\n");
+		dev_err(bridge->parent, "Not a master resource\n");
 		return -EINVAL;
 	}
 
 	image = list_entry(resource->entry, struct vme_master_resource, list);
 
 	if (!bridge->master_get) {
-		printk(KERN_WARNING "%s not supported\n", __func__);
+		dev_warn(bridge->parent, "%s not supported\n", __func__);
 		return -EINVAL;
 	}
 
@@ -650,12 +656,13 @@ ssize_t vme_master_read(struct vme_resource *resource, void *buf, size_t count,
 	size_t length;
 
 	if (!bridge->master_read) {
-		printk(KERN_WARNING "Reading from resource not supported\n");
+		dev_warn(bridge->parent,
+			 "Reading from resource not supported\n");
 		return -EINVAL;
 	}
 
 	if (resource->type != VME_MASTER) {
-		printk(KERN_ERR "Not a master resource\n");
+		dev_err(bridge->parent, "Not a master resource\n");
 		return -EINVAL;
 	}
 
@@ -664,7 +671,7 @@ ssize_t vme_master_read(struct vme_resource *resource, void *buf, size_t count,
 	length = vme_get_size(resource);
 
 	if (offset > length) {
-		printk(KERN_WARNING "Invalid Offset\n");
+		dev_warn(bridge->parent, "Invalid Offset\n");
 		return -EFAULT;
 	}
 
@@ -698,12 +705,12 @@ ssize_t vme_master_write(struct vme_resource *resource, void *buf,
 	size_t length;
 
 	if (!bridge->master_write) {
-		printk(KERN_WARNING "Writing to resource not supported\n");
+		dev_warn(bridge->parent, "Writing to resource not supported\n");
 		return -EINVAL;
 	}
 
 	if (resource->type != VME_MASTER) {
-		printk(KERN_ERR "Not a master resource\n");
+		dev_err(bridge->parent, "Not a master resource\n");
 		return -EINVAL;
 	}
 
@@ -712,7 +719,7 @@ ssize_t vme_master_write(struct vme_resource *resource, void *buf,
 	length = vme_get_size(resource);
 
 	if (offset > length) {
-		printk(KERN_WARNING "Invalid Offset\n");
+		dev_warn(bridge->parent, "Invalid Offset\n");
 		return -EFAULT;
 	}
 
@@ -749,12 +756,12 @@ unsigned int vme_master_rmw(struct vme_resource *resource, unsigned int mask,
 	struct vme_master_resource *image;
 
 	if (!bridge->master_rmw) {
-		printk(KERN_WARNING "Writing to resource not supported\n");
+		dev_warn(bridge->parent, "Writing to resource not supported\n");
 		return -EINVAL;
 	}
 
 	if (resource->type != VME_MASTER) {
-		printk(KERN_ERR "Not a master resource\n");
+		dev_err(bridge->parent, "Not a master resource\n");
 		return -EINVAL;
 	}
 
@@ -777,12 +784,13 @@ EXPORT_SYMBOL(vme_master_rmw);
  */
 int vme_master_mmap(struct vme_resource *resource, struct vm_area_struct *vma)
 {
+	struct vme_bridge *bridge = find_bridge(resource);
 	struct vme_master_resource *image;
 	phys_addr_t phys_addr;
 	unsigned long vma_size;
 
 	if (resource->type != VME_MASTER) {
-		pr_err("Not a master resource\n");
+		dev_err(bridge->parent, "Not a master resource\n");
 		return -EINVAL;
 	}
 
@@ -791,7 +799,7 @@ int vme_master_mmap(struct vme_resource *resource, struct vm_area_struct *vma)
 	vma_size = vma->vm_end - vma->vm_start;
 
 	if (phys_addr + vma_size > image->bus_resource.end + 1) {
-		pr_err("Map size cannot exceed the window size\n");
+		dev_err(bridge->parent, "Map size cannot exceed the window size\n");
 		return -EFAULT;
 	}
 
@@ -809,24 +817,25 @@ EXPORT_SYMBOL(vme_master_mmap);
  */
 void vme_master_free(struct vme_resource *resource)
 {
+	struct vme_bridge *bridge = find_bridge(resource);
 	struct vme_master_resource *master_image;
 
 	if (resource->type != VME_MASTER) {
-		printk(KERN_ERR "Not a master resource\n");
+		dev_err(bridge->parent, "Not a master resource\n");
 		return;
 	}
 
 	master_image = list_entry(resource->entry, struct vme_master_resource,
 				  list);
 	if (!master_image) {
-		printk(KERN_ERR "Can't find master resource\n");
+		dev_err(bridge->parent, "Can't find master resource\n");
 		return;
 	}
 
 	/* Unlock image */
 	spin_lock(&master_image->lock);
 	if (master_image->locked == 0)
-		printk(KERN_ERR "Image is already free\n");
+		dev_err(bridge->parent, "Image is already free\n");
 
 	master_image->locked = 0;
 	spin_unlock(&master_image->lock);
@@ -854,18 +863,19 @@ struct vme_resource *vme_dma_request(struct vme_dev *vdev, u32 route)
 	struct vme_resource *resource = NULL;
 
 	/* XXX Not checking resource attributes */
-	printk(KERN_ERR "No VME resource Attribute tests done\n");
+	dev_err(&vdev->dev, "No VME resource Attribute tests done\n");
 
 	bridge = vdev->bridge;
 	if (!bridge) {
-		printk(KERN_ERR "Can't find VME bus\n");
+		dev_err(&vdev->dev, "Can't find VME bus\n");
 		goto err_bus;
 	}
 
 	/* Loop through DMA resources */
 	list_for_each_entry(dma_ctrlr, &bridge->dma_resources, list) {
 		if (!dma_ctrlr) {
-			printk(KERN_ERR "Registered NULL DMA resource\n");
+			dev_err(bridge->parent,
+				"Registered NULL DMA resource\n");
 			continue;
 		}
 
@@ -917,10 +927,11 @@ EXPORT_SYMBOL(vme_dma_request);
  */
 struct vme_dma_list *vme_new_dma_list(struct vme_resource *resource)
 {
+	struct vme_bridge *bridge = find_bridge(resource);
 	struct vme_dma_list *dma_list;
 
 	if (resource->type != VME_DMA) {
-		printk(KERN_ERR "Not a DMA resource\n");
+		dev_err(bridge->parent, "Not a DMA resource\n");
 		return NULL;
 	}
 
@@ -1098,12 +1109,13 @@ int vme_dma_list_add(struct vme_dma_list *list, struct vme_dma_attr *src,
 	int retval;
 
 	if (!bridge->dma_list_add) {
-		printk(KERN_WARNING "Link List DMA generation not supported\n");
+		dev_warn(bridge->parent,
+			 "Link List DMA generation not supported\n");
 		return -EINVAL;
 	}
 
 	if (!mutex_trylock(&list->mtx)) {
-		printk(KERN_ERR "Link List already submitted\n");
+		dev_err(bridge->parent, "Link List already submitted\n");
 		return -EINVAL;
 	}
 
@@ -1131,7 +1143,8 @@ int vme_dma_list_exec(struct vme_dma_list *list)
 	int retval;
 
 	if (!bridge->dma_list_exec) {
-		printk(KERN_ERR "Link List DMA execution not supported\n");
+		dev_err(bridge->parent,
+			"Link List DMA execution not supported\n");
 		return -EINVAL;
 	}
 
@@ -1160,12 +1173,13 @@ int vme_dma_list_free(struct vme_dma_list *list)
 	int retval;
 
 	if (!bridge->dma_list_empty) {
-		printk(KERN_WARNING "Emptying of Link Lists not supported\n");
+		dev_warn(bridge->parent,
+			 "Emptying of Link Lists not supported\n");
 		return -EINVAL;
 	}
 
 	if (!mutex_trylock(&list->mtx)) {
-		printk(KERN_ERR "Link List in use\n");
+		dev_err(bridge->parent, "Link List in use\n");
 		return -EBUSY;
 	}
 
@@ -1175,7 +1189,7 @@ int vme_dma_list_free(struct vme_dma_list *list)
 	 */
 	retval = bridge->dma_list_empty(list);
 	if (retval) {
-		printk(KERN_ERR "Unable to empty link-list entries\n");
+		dev_err(bridge->parent, "Unable to empty link-list entries\n");
 		mutex_unlock(&list->mtx);
 		return retval;
 	}
@@ -1197,22 +1211,24 @@ EXPORT_SYMBOL(vme_dma_list_free);
  */
 int vme_dma_free(struct vme_resource *resource)
 {
+	struct vme_bridge *bridge = find_bridge(resource);
 	struct vme_dma_resource *ctrlr;
 
 	if (resource->type != VME_DMA) {
-		printk(KERN_ERR "Not a DMA resource\n");
+		dev_err(bridge->parent, "Not a DMA resource\n");
 		return -EINVAL;
 	}
 
 	ctrlr = list_entry(resource->entry, struct vme_dma_resource, list);
 
 	if (!mutex_trylock(&ctrlr->mtx)) {
-		printk(KERN_ERR "Resource busy, can't free\n");
+		dev_err(bridge->parent, "Resource busy, can't free\n");
 		return -EBUSY;
 	}
 
 	if (!(list_empty(&ctrlr->pending) && list_empty(&ctrlr->running))) {
-		printk(KERN_WARNING "Resource still processing transfers\n");
+		dev_warn(bridge->parent,
+			 "Resource still processing transfers\n");
 		mutex_unlock(&ctrlr->mtx);
 		return -EBUSY;
 	}
@@ -1290,8 +1306,9 @@ void vme_irq_handler(struct vme_bridge *bridge, int level, int statid)
 	if (call)
 		call(level, statid, priv_data);
 	else
-		printk(KERN_WARNING "Spurious VME interrupt, level:%x, vector:%x\n",
-		       level, statid);
+		dev_warn(bridge->parent,
+			 "Spurious VME interrupt, level:%x, vector:%x\n", level,
+			 statid);
 }
 EXPORT_SYMBOL(vme_irq_handler);
 
@@ -1319,17 +1336,18 @@ int vme_irq_request(struct vme_dev *vdev, int level, int statid,
 
 	bridge = vdev->bridge;
 	if (!bridge) {
-		printk(KERN_ERR "Can't find VME bus\n");
+		dev_err(&vdev->dev, "Can't find VME bus\n");
 		return -EINVAL;
 	}
 
 	if ((level < 1) || (level > 7)) {
-		printk(KERN_ERR "Invalid interrupt level\n");
+		dev_err(bridge->parent, "Invalid interrupt level\n");
 		return -EINVAL;
 	}
 
 	if (!bridge->irq_set) {
-		printk(KERN_ERR "Configuring interrupts not supported\n");
+		dev_err(bridge->parent,
+			"Configuring interrupts not supported\n");
 		return -EINVAL;
 	}
 
@@ -1337,7 +1355,7 @@ int vme_irq_request(struct vme_dev *vdev, int level, int statid,
 
 	if (bridge->irq[level - 1].callback[statid].func) {
 		mutex_unlock(&bridge->irq_mtx);
-		printk(KERN_WARNING "VME Interrupt already taken\n");
+		dev_warn(bridge->parent, "VME Interrupt already taken\n");
 		return -EBUSY;
 	}
 
@@ -1368,17 +1386,18 @@ void vme_irq_free(struct vme_dev *vdev, int level, int statid)
 
 	bridge = vdev->bridge;
 	if (!bridge) {
-		printk(KERN_ERR "Can't find VME bus\n");
+		dev_err(&vdev->dev, "Can't find VME bus\n");
 		return;
 	}
 
 	if ((level < 1) || (level > 7)) {
-		printk(KERN_ERR "Invalid interrupt level\n");
+		dev_err(bridge->parent, "Invalid interrupt level\n");
 		return;
 	}
 
 	if (!bridge->irq_set) {
-		printk(KERN_ERR "Configuring interrupts not supported\n");
+		dev_err(bridge->parent,
+			"Configuring interrupts not supported\n");
 		return;
 	}
 
@@ -1415,17 +1434,18 @@ int vme_irq_generate(struct vme_dev *vdev, int level, int statid)
 
 	bridge = vdev->bridge;
 	if (!bridge) {
-		printk(KERN_ERR "Can't find VME bus\n");
+		dev_err(&vdev->dev, "Can't find VME bus\n");
 		return -EINVAL;
 	}
 
 	if ((level < 1) || (level > 7)) {
-		printk(KERN_WARNING "Invalid interrupt level\n");
+		dev_warn(bridge->parent, "Invalid interrupt level\n");
 		return -EINVAL;
 	}
 
 	if (!bridge->irq_generate) {
-		printk(KERN_WARNING "Interrupt generation not supported\n");
+		dev_warn(bridge->parent,
+			 "Interrupt generation not supported\n");
 		return -EINVAL;
 	}
 
@@ -1452,14 +1472,15 @@ struct vme_resource *vme_lm_request(struct vme_dev *vdev)
 
 	bridge = vdev->bridge;
 	if (!bridge) {
-		printk(KERN_ERR "Can't find VME bus\n");
+		dev_err(&vdev->dev, "Can't find VME bus\n");
 		goto err_bus;
 	}
 
 	/* Loop through LM resources */
 	list_for_each_entry(lm, &bridge->lm_resources, list) {
 		if (!lm) {
-			printk(KERN_ERR "Registered NULL Location Monitor resource\n");
+			dev_err(bridge->parent,
+				"Registered NULL Location Monitor resource\n");
 			continue;
 		}
 
@@ -1511,10 +1532,11 @@ EXPORT_SYMBOL(vme_lm_request);
  */
 int vme_lm_count(struct vme_resource *resource)
 {
+	struct vme_bridge *bridge = find_bridge(resource);
 	struct vme_lm_resource *lm;
 
 	if (resource->type != VME_LM) {
-		printk(KERN_ERR "Not a Location Monitor resource\n");
+		dev_err(bridge->parent, "Not a Location Monitor resource\n");
 		return -EINVAL;
 	}
 
@@ -1545,14 +1567,14 @@ int vme_lm_set(struct vme_resource *resource, unsigned long long lm_base,
 	struct vme_lm_resource *lm;
 
 	if (resource->type != VME_LM) {
-		printk(KERN_ERR "Not a Location Monitor resource\n");
+		dev_err(bridge->parent, "Not a Location Monitor resource\n");
 		return -EINVAL;
 	}
 
 	lm = list_entry(resource->entry, struct vme_lm_resource, list);
 
 	if (!bridge->lm_set) {
-		printk(KERN_ERR "vme_lm_set not supported\n");
+		dev_err(bridge->parent, "vme_lm_set not supported\n");
 		return -EINVAL;
 	}
 
@@ -1581,14 +1603,14 @@ int vme_lm_get(struct vme_resource *resource, unsigned long long *lm_base,
 	struct vme_lm_resource *lm;
 
 	if (resource->type != VME_LM) {
-		printk(KERN_ERR "Not a Location Monitor resource\n");
+		dev_err(bridge->parent, "Not a Location Monitor resource\n");
 		return -EINVAL;
 	}
 
 	lm = list_entry(resource->entry, struct vme_lm_resource, list);
 
 	if (!bridge->lm_get) {
-		printk(KERN_ERR "vme_lm_get not supported\n");
+		dev_err(bridge->parent, "vme_lm_get not supported\n");
 		return -EINVAL;
 	}
 
@@ -1618,14 +1640,14 @@ int vme_lm_attach(struct vme_resource *resource, int monitor,
 	struct vme_lm_resource *lm;
 
 	if (resource->type != VME_LM) {
-		printk(KERN_ERR "Not a Location Monitor resource\n");
+		dev_err(bridge->parent, "Not a Location Monitor resource\n");
 		return -EINVAL;
 	}
 
 	lm = list_entry(resource->entry, struct vme_lm_resource, list);
 
 	if (!bridge->lm_attach) {
-		printk(KERN_ERR "vme_lm_attach not supported\n");
+		dev_err(bridge->parent, "vme_lm_attach not supported\n");
 		return -EINVAL;
 	}
 
@@ -1651,14 +1673,14 @@ int vme_lm_detach(struct vme_resource *resource, int monitor)
 	struct vme_lm_resource *lm;
 
 	if (resource->type != VME_LM) {
-		printk(KERN_ERR "Not a Location Monitor resource\n");
+		dev_err(bridge->parent, "Not a Location Monitor resource\n");
 		return -EINVAL;
 	}
 
 	lm = list_entry(resource->entry, struct vme_lm_resource, list);
 
 	if (!bridge->lm_detach) {
-		printk(KERN_ERR "vme_lm_detach not supported\n");
+		dev_err(bridge->parent, "vme_lm_detach not supported\n");
 		return -EINVAL;
 	}
 
@@ -1680,10 +1702,11 @@ EXPORT_SYMBOL(vme_lm_detach);
  */
 void vme_lm_free(struct vme_resource *resource)
 {
+	struct vme_bridge *bridge = find_bridge(resource);
 	struct vme_lm_resource *lm;
 
 	if (resource->type != VME_LM) {
-		printk(KERN_ERR "Not a Location Monitor resource\n");
+		dev_err(bridge->parent, "Not a Location Monitor resource\n");
 		return;
 	}
 
@@ -1720,12 +1743,12 @@ int vme_slot_num(struct vme_dev *vdev)
 
 	bridge = vdev->bridge;
 	if (!bridge) {
-		printk(KERN_ERR "Can't find VME bus\n");
+		dev_err(&vdev->dev, "Can't find VME bus\n");
 		return -EINVAL;
 	}
 
 	if (!bridge->slot_get) {
-		printk(KERN_WARNING "vme_slot_num not supported\n");
+		dev_warn(bridge->parent, "vme_slot_num not supported\n");
 		return -EINVAL;
 	}
 
@@ -1748,7 +1771,7 @@ int vme_bus_num(struct vme_dev *vdev)
 
 	bridge = vdev->bridge;
 	if (!bridge) {
-		pr_err("Can't find VME bus\n");
+		dev_err(&vdev->dev, "Can't find VME bus\n");
 		return -EINVAL;
 	}
 
-- 
2.42.0

[PATCH v3 2/5] staging: vme_user: Use __func__ instead of function name

[Soumya Negi]

Replace function names in message strings with __func__ to fix
all checkpatch warnings like:

    WARNING: Prefer using '"%s...", __func__' to using 'vme_lm_get',
             this function's name, in a string

Signed-off-by: Soumya Negi <soumya.negi97@gmail.com>
Acked-by: Andi Shyti <andi.shyti@linux.intel.com>
---
 drivers/staging/vme_user/vme.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/vme_user/vme.c b/drivers/staging/vme_user/vme.c
index 25f3cac641ed..c36c2dc095c5 100644
--- a/drivers/staging/vme_user/vme.c
+++ b/drivers/staging/vme_user/vme.c
@@ -422,7 +422,7 @@ int vme_slave_get(struct vme_resource *resource, int *enabled,
 	image = list_entry(resource->entry, struct vme_slave_resource, list);
 
 	if (!bridge->slave_get) {
-		dev_err(bridge->parent, "vme_slave_get not supported\n");
+		dev_err(bridge->parent, "%s not supported\n", __func__);
 		return -EINVAL;
 	}
 
@@ -574,7 +574,7 @@ int vme_master_set(struct vme_resource *resource, int enabled,
 	image = list_entry(resource->entry, struct vme_master_resource, list);
 
 	if (!bridge->master_set) {
-		dev_warn(bridge->parent, "vme_master_set not supported\n");
+		dev_warn(bridge->parent, "%s not supported\n", __func__);
 		return -EINVAL;
 	}
 
@@ -1574,7 +1574,7 @@ int vme_lm_set(struct vme_resource *resource, unsigned long long lm_base,
 	lm = list_entry(resource->entry, struct vme_lm_resource, list);
 
 	if (!bridge->lm_set) {
-		dev_err(bridge->parent, "vme_lm_set not supported\n");
+		dev_err(bridge->parent, "%s not supported\n", __func__);
 		return -EINVAL;
 	}
 
@@ -1610,7 +1610,7 @@ int vme_lm_get(struct vme_resource *resource, unsigned long long *lm_base,
 	lm = list_entry(resource->entry, struct vme_lm_resource, list);
 
 	if (!bridge->lm_get) {
-		dev_err(bridge->parent, "vme_lm_get not supported\n");
+		dev_err(bridge->parent, "%s not supported\n", __func__);
 		return -EINVAL;
 	}
 
@@ -1647,7 +1647,7 @@ int vme_lm_attach(struct vme_resource *resource, int monitor,
 	lm = list_entry(resource->entry, struct vme_lm_resource, list);
 
 	if (!bridge->lm_attach) {
-		dev_err(bridge->parent, "vme_lm_attach not supported\n");
+		dev_err(bridge->parent, "%s not supported\n", __func__);
 		return -EINVAL;
 	}
 
@@ -1680,7 +1680,7 @@ int vme_lm_detach(struct vme_resource *resource, int monitor)
 	lm = list_entry(resource->entry, struct vme_lm_resource, list);
 
 	if (!bridge->lm_detach) {
-		dev_err(bridge->parent, "vme_lm_detach not supported\n");
+		dev_err(bridge->parent, "%s not supported\n", __func__);
 		return -EINVAL;
 	}
 
@@ -1748,7 +1748,7 @@ int vme_slot_num(struct vme_dev *vdev)
 	}
 
 	if (!bridge->slot_get) {
-		dev_warn(bridge->parent, "vme_slot_num not supported\n");
+		dev_warn(bridge->parent, "%s not supported\n", __func__);
 		return -EINVAL;
 	}
 
-- 
2.42.0

[PATCH v3 3/5] staging: vme_user: Remove printk() in find_bridge()

[Soumya Negi]

Don't log error message in find_bridge(). The printk() triggers a
checkpatch warning:
    WARNING: Prefer [subsystem eg: netdev]_err([subsystem]dev, ... then
             dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...

It can't be replaced by dev_err() & using pr_err() is not helpful as it
doesn't give much context to the user. It is better to remove it.

Signed-off-by: Soumya Negi <soumya.negi97@gmail.com>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/staging/vme_user/vme.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/staging/vme_user/vme.c b/drivers/staging/vme_user/vme.c
index c36c2dc095c5..5efcdf15a068 100644
--- a/drivers/staging/vme_user/vme.c
+++ b/drivers/staging/vme_user/vme.c
@@ -62,7 +62,6 @@ static struct vme_bridge *find_bridge(struct vme_resource *resource)
 		return list_entry(resource->entry, struct vme_lm_resource,
 			list)->parent;
 	default:
-		printk(KERN_ERR "Unknown resource type\n");
 		return NULL;
 	}
 }
-- 
2.42.0

[PATCH v3 4/5] staging: vme_user: Remove NULL-checks

[Soumya Negi]

Don't check for empty bridge device & resource in vme_alloc_consistent()
& vme_free_consistent() since they can not be NULL. Both the VME bridge
device and the VME resource that are used in these functions are set at
probe time.

Signed-off-by: Soumya Negi <soumya.negi97@gmail.com>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/staging/vme_user/vme.c | 36 ++--------------------------------
 1 file changed, 2 insertions(+), 34 deletions(-)

diff --git a/drivers/staging/vme_user/vme.c b/drivers/staging/vme_user/vme.c
index 5efcdf15a068..661d1edfa26a 100644
--- a/drivers/staging/vme_user/vme.c
+++ b/drivers/staging/vme_user/vme.c
@@ -80,23 +80,7 @@ static struct vme_bridge *find_bridge(struct vme_resource *resource)
 void *vme_alloc_consistent(struct vme_resource *resource, size_t size,
 			   dma_addr_t *dma)
 {
-	struct vme_bridge *bridge;
-
-	if (!resource) {
-		printk(KERN_ERR "No resource\n");
-		return NULL;
-	}
-
-	bridge = find_bridge(resource);
-	if (!bridge) {
-		printk(KERN_ERR "Can't find bridge\n");
-		return NULL;
-	}
-
-	if (!bridge->parent) {
-		printk(KERN_ERR "Dev entry NULL for bridge %s\n", bridge->name);
-		return NULL;
-	}
+	struct vme_bridge *bridge = find_bridge(resource);
 
 	if (!bridge->alloc_consistent) {
 		dev_err(bridge->parent,
@@ -121,23 +105,7 @@ EXPORT_SYMBOL(vme_alloc_consistent);
 void vme_free_consistent(struct vme_resource *resource, size_t size,
 			 void *vaddr, dma_addr_t dma)
 {
-	struct vme_bridge *bridge;
-
-	if (!resource) {
-		printk(KERN_ERR "No resource\n");
-		return;
-	}
-
-	bridge = find_bridge(resource);
-	if (!bridge) {
-		printk(KERN_ERR "Can't find bridge\n");
-		return;
-	}
-
-	if (!bridge->parent) {
-		printk(KERN_ERR "Dev entry NULL for bridge %s\n", bridge->name);
-		return;
-	}
+	struct vme_bridge *bridge = find_bridge(resource);
 
 	if (!bridge->free_consistent) {
 		dev_err(bridge->parent,
-- 
2.42.0

[PATCH v3 5/5] staging: vme_user: Use dev_err() in vme_check_window()

[Soumya Negi]

vme_check_window() uses printk() for logging error message. This
leads to the following checkpatch warning:
   WARNING: Prefer [subsystem eg: netdev]_err([subsystem]dev, ... then
            dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...

Use dev_err() instead. Pass VME bridge device to vme_check_window() so
that the error message can be logged with the bridge device context.

Signed-off-by: Soumya Negi <soumya.negi97@gmail.com>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/staging/vme_user/vme.c | 10 +++++-----
 drivers/staging/vme_user/vme.h |  4 ++--
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/vme_user/vme.c b/drivers/staging/vme_user/vme.c
index 661d1edfa26a..5c416c31ec57 100644
--- a/drivers/staging/vme_user/vme.c
+++ b/drivers/staging/vme_user/vme.c
@@ -160,8 +160,8 @@ size_t vme_get_size(struct vme_resource *resource)
 }
 EXPORT_SYMBOL(vme_get_size);
 
-int vme_check_window(u32 aspace, unsigned long long vme_base,
-		     unsigned long long size)
+int vme_check_window(struct vme_bridge *bridge, u32 aspace,
+		     unsigned long long vme_base, unsigned long long size)
 {
 	int retval = 0;
 
@@ -195,7 +195,7 @@ int vme_check_window(u32 aspace, unsigned long long vme_base,
 		/* User Defined */
 		break;
 	default:
-		printk(KERN_ERR "Invalid address space\n");
+		dev_err(bridge->parent, "Invalid address space\n");
 		retval = -EINVAL;
 		break;
 	}
@@ -350,7 +350,7 @@ int vme_slave_set(struct vme_resource *resource, int enabled,
 		return -EINVAL;
 	}
 
-	retval = vme_check_window(aspace, vme_base, size);
+	retval = vme_check_window(bridge, aspace, vme_base, size);
 	if (retval)
 		return retval;
 
@@ -552,7 +552,7 @@ int vme_master_set(struct vme_resource *resource, int enabled,
 		return -EINVAL;
 	}
 
-	retval = vme_check_window(aspace, vme_base, size);
+	retval = vme_check_window(bridge, aspace, vme_base, size);
 	if (retval)
 		return retval;
 
diff --git a/drivers/staging/vme_user/vme.h b/drivers/staging/vme_user/vme.h
index fbcbd0204453..06504dccd5ff 100644
--- a/drivers/staging/vme_user/vme.h
+++ b/drivers/staging/vme_user/vme.h
@@ -133,8 +133,8 @@ void vme_free_consistent(struct vme_resource *, size_t,  void *,
 	dma_addr_t);
 
 size_t vme_get_size(struct vme_resource *);
-int vme_check_window(u32 aspace, unsigned long long vme_base,
-		     unsigned long long size);
+int vme_check_window(struct vme_bridge *bridge, u32 aspace,
+		     unsigned long long vme_base, unsigned long long size);
 
 struct vme_resource *vme_slave_request(struct vme_dev *, u32, u32);
 int vme_slave_set(struct vme_resource *, int, unsigned long long,
-- 
2.42.0