linux-kernel - [PATCH v2 6/8] PCI: pciehp: Remove unnecessary guard

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Date:   Mon, 12 Sep 2016 16:09:36 -0500
From:   Bjorn Helgaas <bhelgaas@...gle.com>
To:     Mayurkumar Patel <mayurkumar.patel@...el.com>
Cc:     Rajat Jain <rajatja@...gle.com>, MikaWesterberg@...ux.intel.com,
        linux-pci@...r.kernel.org,
        Rafael J Wysocki <rafael.j.wysocki@...el.com>,
        linux-kernel@...r.kernel.org, Keith Busch <keith.busch@...el.com>,
        Luis Antonio Tarazona-Duarte 
        <luis.antonio.tarazona-duarte@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        mika.westerberg@...ux.intel.com
Subject: [PATCH v2 6/8] PCI: pciehp: Remove unnecessary guard

In pcie_isr(), we return early if no status bits other than
PCI_EXP_SLTSTA_CC are set.  This was introduced by dbd79aed1aea ("pciehp:
fix NULL dereference in interrupt handler"), but it is no longer necessary
because all the subsequent pcie_isr() code is already predicated on a
status bit being set.

Remove the unnecessary test for ~PCI_EXP_SLTSTA_CC.  No functional change
intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 drivers/pci/hotplug/pciehp_hpc.c |    3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index fe99b45..60e1d55 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -590,9 +590,6 @@ static irqreturn_t pciehp_isr(int irq, void *dev_id)
 		}
 	}
 
-	if (!(events & ~PCI_EXP_SLTSTA_CC))
-		return IRQ_HANDLED;
-
 	/* Check Attention Button Pressed */
 	if (events & PCI_EXP_SLTSTA_ABP) {
 		ctrl_info(ctrl, "Button pressed on Slot(%s)\n",