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Revert "phy: IRQ cannot be shared"

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This reverts:
  commit 33c133cc75 ("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>
This commit is contained in:
Xander Huff 2016-08-24 16:47:53 -05:00 committed by David S. Miller
parent 4f101c4779
commit c3e70edd7c
1 changed files with 4 additions and 2 deletions
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6
drivers/net/phy/phy.c
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@ -722,8 +722,10 @@ phy_err:
int phy_start_interrupts(struct phy_device *phydev) int phy_start_interrupts(struct phy_device *phydev)
{ {
atomic_set(&phydev->irq_disable, 0); atomic_set(&phydev->irq_disable, 0);
if (request_irq(phydev->irq, phy_interrupt, 0, "phy_interrupt", if (request_irq(phydev->irq, phy_interrupt,
phydev) < 0) { IRQF_SHARED,
"phy_interrupt",
phydev) < 0) {
pr_warn("%s: Can't get IRQ %d (PHY)\n", pr_warn("%s: Can't get IRQ %d (PHY)\n",
phydev->mdio.bus->name, phydev->irq); phydev->mdio.bus->name, phydev->irq);
phydev->irq = PHY_POLL; phydev->irq = PHY_POLL;