Patch "PCI: hv: Allocate interrupt descriptors with GFP_ATOMIC" has been added to the 4.9-stable tree

Patch "PCI: hv: Allocate interrupt descriptors with GFP_ATOMIC" 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: hv: Allocate interrupt descriptors with GFP_ATOMIC

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-hv-allocate-interrupt-descriptors-with-gfp_atomic.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 59c58ceeea9cdc6144d7b0303753e6bd26d87455 Mon Sep 17 00:00:00 2001
From: "K. Y. Srinivasan" <kys@microsoft.com>
Date: Fri, 24 Mar 2017 11:07:22 -0700
Subject: PCI: hv: Allocate interrupt descriptors with GFP_ATOMIC

From: K. Y. Srinivasan <kys@microsoft.com>

commit 59c58ceeea9cdc6144d7b0303753e6bd26d87455 upstream.

The memory allocation here needs to be non-blocking.  Fix the issue.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Long Li <longli@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/pci/host/pci-hyperv.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/pci/host/pci-hyperv.c
+++ b/drivers/pci/host/pci-hyperv.c
@@ -868,7 +868,7 @@ static void hv_compose_msi_msg(struct ir
 		hv_int_desc_free(hpdev, int_desc);
 	}
 
-	int_desc = kzalloc(sizeof(*int_desc), GFP_KERNEL);
+	int_desc = kzalloc(sizeof(*int_desc), GFP_ATOMIC);
 	if (!int_desc)
 		goto drop_reference;
 


Patches currently in stable-queue which might be from kys@microsoft.com are

queue-4.9/pci-hv-allocate-interrupt-descriptors-with-gfp_atomic.patch
queue-4.9/pci-hv-specify-cpu_affinity_all-for-msi-affinity-when-32-cpus.patch