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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 <mchehab@infradead.org>
This commit is contained in:
Hendrik Borghorst 2007-04-05 14:28:11 -03:00 committed by Mauro Carvalho Chehab
parent 990e3743b5
commit 4f210e0722
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/media/dvb/b2c2/flexcop-pci.c
View File

@ -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;