Patch "PCI/MSI: Return failure when msix_setup_entries() fails" has been added to the 4.9-stable tree

Patch "PCI/MSI: Return failure when msix_setup_entries() fails" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    PCI/MSI: Return failure when msix_setup_entries() fails

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     pci-msi-return-failure-when-msix_setup_entries-fails.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Nov  6 10:07:35 CET 2017
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Sat, 7 Oct 2017 22:36:49 +0000
Subject: PCI/MSI: Return failure when msix_setup_entries() fails

From: Christophe JAILLET <christophe.jaillet@wanadoo.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@wanadoo.fr>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/pci/msi.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -730,7 +730,7 @@ static int msix_setup_entries(struct pci
 	ret = 0;
 out:
 	kfree(masks);
-	return 0;
+	return ret;
 }
 
 static void msix_program_entries(struct pci_dev *dev,


Patches currently in stable-queue which might be from christophe.jaillet@wanadoo.fr are

queue-4.9/pci-msi-return-failure-when-msix_setup_entries-fails.patch