linux-kernel - [PATCH review for 4.9 12/50] PCI/MSI: Return failure when msix_setup

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Date:   Sat, 7 Oct 2017 22:36:49 +0000
From:   "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
Subject: [PATCH review for 4.9 12/50] PCI/MSI: Return failure when
 msix_setup_entries() fails

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

[ Upstream commit 3adfb572f2978a980b250a9e1a56f84f3a031001 ]

If alloc_msi_entry() fails, we free resources and set ret = -ENOMEM.

However, msix_setup_entries() returns 0 unconditionally.  Return the error
code instead.

Fixes: e75eafb9b039 ("genirq/msi: Switch to new irq spreading infrastructure")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/pci/msi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 3455f752d5e4..0e9a9dbeb184 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -730,7 +730,7 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
 	ret = 0;
 out:
 	kfree(masks);
-	return 0;
+	return ret;
 }
 
 static void msix_program_entries(struct pci_dev *dev,
-- 
2.11.0