Patch "Revert "phy: IRQ cannot be shared"" has been added to the 4.7-stable tree

Patch "Revert "phy: IRQ cannot be shared"" has been added to the 4.7-stable tree

[gregkh]

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

    Revert "phy: IRQ cannot be shared"

to the 4.7-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:
     revert-phy-irq-cannot-be-shared.patch
and it can be found in the queue-4.7 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 Wed Sep 21 10:05:18 CEST 2016
From: Xander Huff <xander.huff@ni.com>
Date: Wed, 24 Aug 2016 16:47:53 -0500
Subject: Revert "phy: IRQ cannot be shared"

From: Xander Huff <xander.huff@ni.com>


[ Upstream commit c3e70edd7c2eed6acd234627a6007627f5c76e8e ]

This reverts:
  commit 33c133cc7598 ("phy: IRQ cannot be shared")

On hardware with multiple PHY devices hooked up to the same IRQ line, allow
them to share it.

Sergei Shtylyov says:
  "I'm not sure now what was the reason I concluded that the IRQ sharing
  was impossible... most probably I thought that the kernel IRQ handling
  code exited the loop over the IRQ actions once IRQ_HANDLED was returned
  -- which is obviously not so in reality..."

Signed-off-by: Xander Huff <xander.huff@ni.com>
Signed-off-by: Nathan Sullivan <nathan.sullivan@ni.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/phy/phy.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -722,8 +722,10 @@ phy_err:
 int phy_start_interrupts(struct phy_device *phydev)
 {
 	atomic_set(&phydev->irq_disable, 0);
-	if (request_irq(phydev->irq, phy_interrupt, 0, "phy_interrupt",
-			phydev) < 0) {
+	if (request_irq(phydev->irq, phy_interrupt,
+				IRQF_SHARED,
+				"phy_interrupt",
+				phydev) < 0) {
 		pr_warn("%s: Can't get IRQ %d (PHY)\n",
 			phydev->mdio.bus->name, phydev->irq);
 		phydev->irq = PHY_POLL;


Patches currently in stable-queue which might be from xander.huff@ni.com are

queue-4.7/revert-phy-irq-cannot-be-shared.patch