From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Greg Kroah-Hartman" , "Malcolm Priestley" Date: Thu, 11 Sep 2014 13:32:13 +0100 Message-ID: Subject: [PATCH 3.2 019/131] staging: vt6655: Fix Warning on boot handle_irq_event_percpu. In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.2.63-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Malcolm Priestley commit 6cff1f6ad4c615319c1a146b2aa0af1043c5e9f5 upstream. 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 Signed-off-by: Greg Kroah-Hartman [bwh: Backported to 3.2: adjust context, indentation] Signed-off-by: Ben Hutchings --- drivers/staging/vt6655/device_main.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/drivers/staging/vt6655/device_main.c +++ b/drivers/staging/vt6655/device_main.c @@ -2679,6 +2679,7 @@ static irqreturn_t device_intr(int irq unsigned char byData = 0; int ii= 0; // unsigned char byRSSI; + unsigned long flags; MACvReadISR(pDevice->PortOffset, &pDevice->dwIsr); @@ -2704,7 +2705,8 @@ static irqreturn_t device_intr(int irq 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); @@ -2952,7 +2954,8 @@ static irqreturn_t device_intr(int irq MACvSelectPage1(pDevice->PortOffset); } - spin_unlock_irq(&pDevice->lock); + spin_unlock_irqrestore(&pDevice->lock, flags); + MACvIntEnable(pDevice->PortOffset, IMR_MASK_VALUE); return IRQ_RETVAL(handled);