linux-kernel - [tip: irq/core] PCI/MSI: Consolidate error handling in msi_capability

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Date:   Tue, 10 Aug 2021 09:07:39 -0000
From:   "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: irq/core] PCI/MSI: Consolidate error handling in msi_capability_init()

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     8eb5ce3f78a5e5d3f1a12248f6b7dc64ebf71da6
Gitweb:        https://git.kernel.org/tip/8eb5ce3f78a5e5d3f1a12248f6b7dc64ebf71da6
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Thu, 29 Jul 2021 23:51:54 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Tue, 10 Aug 2021 11:03:29 +02:00

PCI/MSI: Consolidate error handling in msi_capability_init()

Three error exits doing exactly the same ask for a common error exit point.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Tested-by: Marc Zyngier <maz@...nel.org>
Reviewed-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/20210729222543.098828720@linutronix.de

---
 drivers/pci/msi.c | 26 +++++++++++---------------
 1 file changed, 11 insertions(+), 15 deletions(-)

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 175f4d6..d2821bb 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -659,25 +659,16 @@ static int msi_capability_init(struct pci_dev *dev, int nvec,
 
 	/* Configure MSI capability structure */
 	ret = pci_msi_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSI);
-	if (ret) {
-		msi_mask_irq(entry, mask, 0);
-		free_msi_irqs(dev);
-		return ret;
-	}
+	if (ret)
+		goto err;
 
 	ret = msi_verify_entries(dev);
-	if (ret) {
-		msi_mask_irq(entry, mask, 0);
-		free_msi_irqs(dev);
-		return ret;
-	}
+	if (ret)
+		goto err;
 
 	ret = populate_msi_sysfs(dev);
-	if (ret) {
-		msi_mask_irq(entry, mask, 0);
-		free_msi_irqs(dev);
-		return ret;
-	}
+	if (ret)
+		goto err;
 
 	/* Set MSI enabled bits	*/
 	pci_intx_for_msi(dev, 0);
@@ -687,6 +678,11 @@ static int msi_capability_init(struct pci_dev *dev, int nvec,
 	pcibios_free_irq(dev);
 	dev->irq = entry->irq;
 	return 0;
+
+err:
+	msi_mask_irq(entry, mask, 0);
+	free_msi_irqs(dev);
+	return ret;
 }
 
 static void __iomem *msix_map_region(struct pci_dev *dev, unsigned nr_entries)