4.9-stable review patch. If anyone has any objections, please let me know.
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From: Malcolm Priestley tvboxspy@gmail.com
commit 3b9c2f2e0e99bb67c96abcb659b3465efe3bee1f upstream.
It appears on some slower systems that the driver can find its way out of the workqueue while the interrupt is disabled by continuous polling by it.
Move MACvIntEnable to vnt_interrupt_work so that it is always enabled on all routes out of vnt_interrupt_process.
Move MACvIntDisable so that the device doesn't keep polling the system while the workqueue is being processed.
Signed-off-by: Malcolm Priestley tvboxspy@gmail.com CC: stable@vger.kernel.org # v4.2+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/staging/vt6655/device_main.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/staging/vt6655/device_main.c +++ b/drivers/staging/vt6655/device_main.c @@ -977,8 +977,6 @@ static void vnt_interrupt_process(struct return; }
- MACvIntDisable(priv->PortOffset); - spin_lock_irqsave(&priv->lock, flags);
/* Read low level stats */ @@ -1067,8 +1065,6 @@ static void vnt_interrupt_process(struct }
spin_unlock_irqrestore(&priv->lock, flags); - - MACvIntEnable(priv->PortOffset, IMR_MASK_VALUE); }
static void vnt_interrupt_work(struct work_struct *work) @@ -1078,6 +1074,8 @@ static void vnt_interrupt_work(struct wo
if (priv->vif) vnt_interrupt_process(priv); + + MACvIntEnable(priv->PortOffset, IMR_MASK_VALUE); }
static irqreturn_t vnt_interrupt(int irq, void *arg) @@ -1086,6 +1084,8 @@ static irqreturn_t vnt_interrupt(int irq
schedule_work(&priv->interrupt_work);
+ MACvIntDisable(priv->PortOffset); + return IRQ_HANDLED; }