linux-kernel - [PATCH 4.9 123/137] usb: gadget: udc: net2272: Fix bitwise and boolean operations

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Message-Id: <20190211141823.588396356@linuxfoundation.org>
Date:   Mon, 11 Feb 2019 15:20:04 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>
Subject: [PATCH 4.9 123/137] usb: gadget: udc: net2272: Fix bitwise and boolean operations

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Gustavo A. R. Silva <gustavo@...eddedor.com>

commit 07c69f1148da7de3978686d3af9263325d9d60bd upstream.

(!x & y) strikes again.

Fix bitwise and boolean operations by enclosing the expression:

	intcsr & (1 << NET2272_PCI_IRQ)

in parentheses, before applying the boolean operator '!'.

Notice that this code has been there since 2011. So, it would
be helpful if someone can double-check this.

This issue was detected with the help of Coccinelle.

Fixes: ceb80363b2ec ("USB: net2272: driver for PLX NET2272 USB device controller")
Cc: stable@...r.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/gadget/udc/net2272.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -2096,7 +2096,7 @@ static irqreturn_t net2272_irq(int irq,
 #if defined(PLX_PCI_RDK2)
 	/* see if PCI int for us by checking irqstat */
 	intcsr = readl(dev->rdk2.fpga_base_addr + RDK2_IRQSTAT);
-	if (!intcsr & (1 << NET2272_PCI_IRQ)) {
+	if (!(intcsr & (1 << NET2272_PCI_IRQ))) {
 		spin_unlock(&dev->lock);
 		return IRQ_NONE;
 	}