From: Greg Ungerer <gerg@snapgear.com>
Date: Tue, 4 Mar 2008 06:52:01 +0000 (+1000)
Subject: m68knommu: fix fec driver interrupt races
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0a504779d312ab20b9dbe3c8f1c66f395f80e2eb;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

m68knommu: fix fec driver interrupt races

The FEC driver has a common interrupt handler for all interrupt event
types. It is raised on a number of distinct interrupt vectors.
This handler can't be re-entered while processing an interrupt, so
make sure all requested vectors are flagged as IRQF_DISABLED.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index 0fbf1bbbaee9..d7a3ea88eddb 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -1253,7 +1253,7 @@ static void __inline__ fec_request_intrs(struct net_device *dev)
 
 	/* Setup interrupt handlers. */
 	for (idp = id; idp->name; idp++) {
-		if (request_irq(idp->irq, idp->handler, 0, idp->name, dev) != 0)
+		if (request_irq(idp->irq, idp->handler, IRQF_DISABLED, idp->name, dev) != 0)
 			printk("FEC: Could not allocate %s IRQ(%d)!\n", idp->name, idp->irq);
 	}
 
@@ -1382,7 +1382,7 @@ static void __inline__ fec_request_intrs(struct net_device *dev)
 
 	/* Setup interrupt handlers. */
 	for (idp = id; idp->name; idp++) {
-		if (request_irq(b+idp->irq, fec_enet_interrupt, 0, idp->name, dev) != 0)
+		if (request_irq(b+idp->irq, fec_enet_interrupt, IRQF_DISABLED, idp->name, dev) != 0)
 			printk("FEC: Could not allocate %s IRQ(%d)!\n", idp->name, b+idp->irq);
 	}
 
@@ -1553,7 +1553,7 @@ static void __inline__ fec_request_intrs(struct net_device *dev)
 
 	/* Setup interrupt handlers. */
 	for (idp = id; idp->name; idp++) {
-		if (request_irq(b+idp->irq,fec_enet_interrupt,0,idp->name,dev)!=0)
+		if (request_irq(b+idp->irq, fec_enet_interrupt, IRQF_DISABLED, idp->name,dev) != 0)
 			printk("FEC: Could not allocate %s IRQ(%d)!\n", idp->name, b+idp->irq);
 	}
 
@@ -1680,7 +1680,7 @@ static void __inline__ fec_request_intrs(struct net_device *dev)
 
 	/* Setup interrupt handlers. */
 	for (idp = id; idp->name; idp++) {
-		if (request_irq(b+idp->irq,fec_enet_interrupt,0,idp->name,dev)!=0)
+		if (request_irq(b+idp->irq, fec_enet_interrupt, IRQF_DISABLED, idp->name,dev) != 0)
 			printk("FEC: Could not allocate %s IRQ(%d)!\n",
 				idp->name, b+idp->irq);
 	}