From: Hendrik Borghorst Date: Thu, 5 Apr 2007 17:28:11 +0000 (-0300) Subject: V4L/DVB (5505): Fix Kernel Bugzilla #8301: spinlock fix for flexcop-pci X-Git-Tag: v2.6.22-rc1~1118^2~44 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4f210e072235c3c123b068d348a1a02e624ff5be;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git V4L/DVB (5505): Fix Kernel Bugzilla #8301: spinlock fix for flexcop-pci If you modprobe the b2c2-flexcop-pci module you got a hardlock of your system. This is due the usage of spin_lock before spin_lock_init is called. Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/dvb/b2c2/flexcop-pci.c b/drivers/media/dvb/b2c2/flexcop-pci.c index 6e16680..01af4d2 100644 --- a/drivers/media/dvb/b2c2/flexcop-pci.c +++ b/drivers/media/dvb/b2c2/flexcop-pci.c @@ -127,10 +127,11 @@ static irqreturn_t flexcop_pci_isr(int irq, void *dev_id) { struct flexcop_pci *fc_pci = dev_id; struct flexcop_device *fc = fc_pci->fc_dev; + unsigned long flags; flexcop_ibi_value v; irqreturn_t ret = IRQ_HANDLED; - spin_lock_irq(&fc_pci->irq_lock); + spin_lock_irqsave(&fc_pci->irq_lock,flags); v = fc->read_ibi_reg(fc,irq_20c); @@ -194,7 +195,7 @@ static irqreturn_t flexcop_pci_isr(int irq, void *dev_id) ret = IRQ_NONE; } - spin_unlock_irq(&fc_pci->irq_lock); + spin_unlock_irqrestore(&fc_pci->irq_lock,flags); return ret; } @@ -293,12 +294,12 @@ static int flexcop_pci_init(struct flexcop_pci *fc_pci) } pci_set_drvdata(fc_pci->pdev, fc_pci); - + spin_lock_init(&fc_pci->irq_lock); if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_isr, IRQF_SHARED, DRIVER_NAME, fc_pci)) != 0) goto err_pci_iounmap; - spin_lock_init(&fc_pci->irq_lock); + fc_pci->init_state |= FC_PCI_INIT; return ret;