[PATCH v2] drm/amd/amdgpu: Fix assingment in if condition in amdgpu_irq.c

[Srinivasan Shanmugam <srinivasan.shanmugam@xxxxxxx>]

Assignments in if condition are less readable and error-prone.

Fixes below error & warnings reported by checkpatch"

ERROR: do not use assignment in if condition
+       } else if ((src = adev->irq.client[client_id].sources[src_id])) {

WARNING: braces {} are not necessary for any arm of this statement
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'

Cc: Christian König <christian.koenig@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@xxxxxxx>
---

v2:

- Validate the client_id and src_id values or otherwise
  this can crash (Christian)

 drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 29 +++++++++++++------------
 1 file changed, 15 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index c8413470e057..dfaedb0243ba 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
@@ -110,7 +110,7 @@ const char *soc15_ih_clientid_name[] = {
 void amdgpu_irq_disable_all(struct amdgpu_device *adev)
 {
 	unsigned long irqflags;
-	unsigned i, j, k;
+	unsigned int i, j, k;
 	int r;
 
 	spin_lock_irqsave(&adev->irq.lock, irqflags);
@@ -269,11 +269,11 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
 		int nvec = pci_msix_vec_count(adev->pdev);
 		unsigned int flags;
 
-		if (nvec <= 0) {
+		if (nvec <= 0)
 			flags = PCI_IRQ_MSI;
-		} else {
+		else
 			flags = PCI_IRQ_MSI | PCI_IRQ_MSIX;
-		}
+
 		/* we only need one vector */
 		nvec = pci_alloc_irq_vectors(adev->pdev, 1, 1, flags);
 		if (nvec > 0) {
@@ -332,7 +332,7 @@ void amdgpu_irq_fini_hw(struct amdgpu_device *adev)
  */
 void amdgpu_irq_fini_sw(struct amdgpu_device *adev)
 {
-	unsigned i, j;
+	unsigned int i, j;
 
 	for (i = 0; i < AMDGPU_IRQ_CLIENTID_MAX; ++i) {
 		if (!adev->irq.client[i].sources)
@@ -366,7 +366,7 @@ void amdgpu_irq_fini_sw(struct amdgpu_device *adev)
  * 0 on success or error code otherwise
  */
 int amdgpu_irq_add_id(struct amdgpu_device *adev,
-		      unsigned client_id, unsigned src_id,
+		      unsigned int client_id, unsigned int src_id,
 		      struct amdgpu_irq_src *source)
 {
 	if (client_id >= AMDGPU_IRQ_CLIENTID_MAX)
@@ -418,8 +418,8 @@ void amdgpu_irq_dispatch(struct amdgpu_device *adev,
 {
 	u32 ring_index = ih->rptr >> 2;
 	struct amdgpu_iv_entry entry;
-	unsigned client_id, src_id;
-	struct amdgpu_irq_src *src;
+	unsigned int client_id, src_id;
+	struct amdgpu_irq_src *src = NULL;
 	bool handled = false;
 	int r;
 
@@ -446,7 +446,8 @@ void amdgpu_irq_dispatch(struct amdgpu_device *adev,
 		DRM_DEBUG("Unregistered interrupt client_id: %d src_id: %d\n",
 			  client_id, src_id);
 
-	} else if ((src = adev->irq.client[client_id].sources[src_id])) {
+	} else if (client_id < AMDGPU_IRQ_CLIENTID_MAX && src_id < AMDGPU_MAX_IRQ_SRC_ID) {
+		src = adev->irq.client[client_id].sources[src_id];
 		r = src->funcs->process(adev, src, &entry);
 		if (r < 0)
 			DRM_ERROR("error processing interrupt (%d)\n", r);
@@ -493,7 +494,7 @@ void amdgpu_irq_delegate(struct amdgpu_device *adev,
  * Updates interrupt state for the specific source (all ASICs).
  */
 int amdgpu_irq_update(struct amdgpu_device *adev,
-			     struct amdgpu_irq_src *src, unsigned type)
+			     struct amdgpu_irq_src *src, unsigned int type)
 {
 	unsigned long irqflags;
 	enum amdgpu_interrupt_state state;
@@ -556,7 +557,7 @@ void amdgpu_irq_gpu_reset_resume_helper(struct amdgpu_device *adev)
  * 0 on success or error code otherwise
  */
 int amdgpu_irq_get(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
-		   unsigned type)
+		   unsigned int type)
 {
 	if (!adev->irq.installed)
 		return -ENOENT;
@@ -586,7 +587,7 @@ int amdgpu_irq_get(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
  * 0 on success or error code otherwise
  */
 int amdgpu_irq_put(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
-		   unsigned type)
+		   unsigned int type)
 {
 	if (!adev->irq.installed)
 		return -ENOENT;
@@ -620,7 +621,7 @@ int amdgpu_irq_put(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
  * invalid parameters
  */
 bool amdgpu_irq_enabled(struct amdgpu_device *adev, struct amdgpu_irq_src *src,
-			unsigned type)
+			unsigned int type)
 {
 	if (!adev->irq.installed)
 		return false;
@@ -733,7 +734,7 @@ void amdgpu_irq_remove_domain(struct amdgpu_device *adev)
  * Returns:
  * Linux IRQ
  */
-unsigned amdgpu_irq_create_mapping(struct amdgpu_device *adev, unsigned src_id)
+unsigned int amdgpu_irq_create_mapping(struct amdgpu_device *adev, unsigned int src_id)
 {
 	adev->irq.virq[src_id] = irq_create_mapping(adev->irq.domain, src_id);
 
-- 
2.25.1