linux-kernel - [PATCH -next v2] habanalabs/gaudi2: fix free irq in error path in gaudi2_enable

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Date:   Tue, 13 Sep 2022 11:07:14 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-kernel@...r.kernel.org>
CC:     <ogabbay@...nel.org>
Subject: [PATCH -next v2] habanalabs/gaudi2: fix free irq in error path in gaudi2_enable_msix()

Add two variables to store completion irq and event queue irq. And add
a new lable to free event queue irq in error path in gaudi2_enable_msix().

Fixes: d7bb1ac89b2f ("habanalabs: add gaudi2 asic-specific code")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
v2:
  print correct irq in error prints.
---
 drivers/misc/habanalabs/gaudi2/gaudi2.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/drivers/misc/habanalabs/gaudi2/gaudi2.c b/drivers/misc/habanalabs/gaudi2/gaudi2.c
index 98336a1a84b0..8f521d8a1aa1 100644
--- a/drivers/misc/habanalabs/gaudi2/gaudi2.c
+++ b/drivers/misc/habanalabs/gaudi2/gaudi2.c
@@ -3518,6 +3518,7 @@ static int gaudi2_enable_msix(struct hl_device *hdev)
 	struct asic_fixed_properties *prop = &hdev->asic_prop;
 	struct gaudi2_device *gaudi2 = hdev->asic_specific;
 	int rc, irq, i, j, user_irq_init_cnt;
+	int completion_irq, event_queue_irq;
 	irq_handler_t irq_handler;
 	struct hl_cq *cq;
 
@@ -3532,26 +3533,28 @@ static int gaudi2_enable_msix(struct hl_device *hdev)
 		return rc;
 	}
 
-	irq = pci_irq_vector(hdev->pdev, GAUDI2_IRQ_NUM_COMPLETION);
+	completion_irq = pci_irq_vector(hdev->pdev, GAUDI2_IRQ_NUM_COMPLETION);
 	cq = &hdev->completion_queue[GAUDI2_RESERVED_CQ_CS_COMPLETION];
-	rc = request_irq(irq, hl_irq_handler_cq, 0, gaudi2_irq_name(GAUDI2_IRQ_NUM_COMPLETION), cq);
+	rc = request_irq(completion_irq, hl_irq_handler_cq, 0,
+			 gaudi2_irq_name(GAUDI2_IRQ_NUM_COMPLETION), cq);
 	if (rc) {
-		dev_err(hdev->dev, "Failed to request IRQ %d", irq);
+		dev_err(hdev->dev, "Failed to request IRQ %d", completion_irq);
 		goto free_irq_vectors;
 	}
 
-	irq = pci_irq_vector(hdev->pdev, GAUDI2_IRQ_NUM_EVENT_QUEUE);
-	rc = request_irq(irq, hl_irq_handler_eq, 0, gaudi2_irq_name(GAUDI2_IRQ_NUM_EVENT_QUEUE),
-			&hdev->event_queue);
+	event_queue_irq = pci_irq_vector(hdev->pdev, GAUDI2_IRQ_NUM_EVENT_QUEUE);
+	rc = request_irq(event_queue_irq, hl_irq_handler_eq, 0,
+			 gaudi2_irq_name(GAUDI2_IRQ_NUM_EVENT_QUEUE),
+			 &hdev->event_queue);
 	if (rc) {
-		dev_err(hdev->dev, "Failed to request IRQ %d", irq);
+		dev_err(hdev->dev, "Failed to request IRQ %d", event_queue_irq);
 		goto free_completion_irq;
 	}
 
 	rc = gaudi2_dec_enable_msix(hdev);
 	if (rc) {
 		dev_err(hdev->dev, "Failed to enable decoder IRQ");
-		goto free_completion_irq;
+		goto free_event_queue_irq;
 	}
 
 	for (i = GAUDI2_IRQ_NUM_USER_FIRST, j = prop->user_dec_intr_count, user_irq_init_cnt = 0;
@@ -3582,9 +3585,11 @@ static int gaudi2_enable_msix(struct hl_device *hdev)
 
 	gaudi2_dec_disable_msix(hdev, GAUDI2_IRQ_NUM_SHARED_DEC1_ABNRM + 1);
 
+free_event_queue_irq:
+	free_irq(event_queue_irq, &hdev->event_queue);
+
 free_completion_irq:
-	irq = pci_irq_vector(hdev->pdev, GAUDI2_IRQ_NUM_COMPLETION);
-	free_irq(irq, cq);
+	free_irq(completion_irq, cq);
 
 free_irq_vectors:
 	pci_free_irq_vectors(hdev->pdev);
-- 
2.25.1