This is a note to let you know that I've just added the patch titled
staging: vt6655: Fix Warning on boot handle_irq_event_percpu.
to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>From 6cff1f6ad4c615319c1a146b2aa0af1043c5e9f5 Mon Sep 17 00:00:00 2001
From: Malcolm Priestley <[email protected]>
Date: Wed, 23 Jul 2014 21:35:11 +0100
Subject: staging: vt6655: Fix Warning on boot handle_irq_event_percpu.
WARNING: CPU: 0 PID: 929 at /home/apw/COD/linux/kernel/irq/handle.c:147
handle_irq_event_percpu+0x1d1/0x1e0()
irq 17 handler device_intr+0x0/0xa80 [vt6655_stage] enabled interrupts
Using spin_lock_irqsave appears to fix this.
Signed-off-by: Malcolm Priestley <[email protected]>
Cc: <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/staging/vt6655/device_main.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/vt6655/device_main.c
b/drivers/staging/vt6655/device_main.c
index 1d3908d044d0..5a5fd937a442 100644
--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -2318,6 +2318,7 @@ static irqreturn_t device_intr(int irq, void
*dev_instance) {
int handled = 0;
unsigned char byData = 0;
int ii = 0;
+ unsigned long flags;
MACvReadISR(pDevice->PortOffset, &pDevice->dwIsr);
@@ -2331,7 +2332,8 @@ static irqreturn_t device_intr(int irq, void
*dev_instance) {
handled = 1;
MACvIntDisable(pDevice->PortOffset);
- spin_lock_irq(&pDevice->lock);
+
+ spin_lock_irqsave(&pDevice->lock, flags);
//Make sure current page is 0
VNSvInPortB(pDevice->PortOffset + MAC_REG_PAGE1SEL, &byOrgPageSel);
@@ -2560,7 +2562,8 @@ static irqreturn_t device_intr(int irq, void
*dev_instance) {
if (byOrgPageSel == 1)
MACvSelectPage1(pDevice->PortOffset);
- spin_unlock_irq(&pDevice->lock);
+ spin_unlock_irqrestore(&pDevice->lock, flags);
+
MACvIntEnable(pDevice->PortOffset, IMR_MASK_VALUE);
return IRQ_RETVAL(handled);
--
2.0.2
--
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