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| author | Valentine Barshak <vbarshak@ru.mvista.com> | 2007-11-14 07:25:21 +1100 |
|---|---|---|
| committer | Josh Boyer <jwboyer@linux.vnet.ibm.com> | 2007-11-19 08:22:03 -0600 |
| commit | b8b799a497e4a4bfd5fca8abc526e908b26c71e8 (patch) | |
| tree | 82ed79a7ba809a3fde7fb8f0a57efcd50af27e13 /arch/powerpc | |
| parent | 2ae24c521a9793e36b1a2311fa64915c2e7b1b7b (diff) | |
| download | linux-stable-b8b799a497e4a4bfd5fca8abc526e908b26c71e8.tar.gz linux-stable-b8b799a497e4a4bfd5fca8abc526e908b26c71e8.tar.bz2 linux-stable-b8b799a497e4a4bfd5fca8abc526e908b26c71e8.zip | |
[POWERPC] 4xx: UIC add mask_ack callback
This adds uic_mask_ack_irq() callback to PowerPC 4xx uic code
to avoid kernel crash. It is used for edge-triggered interrupts
by handle_uic_irq().
Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/sysdev/uic.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/uic.c b/arch/powerpc/sysdev/uic.c index 5149716c734d..847a5496b869 100644 --- a/arch/powerpc/sysdev/uic.c +++ b/arch/powerpc/sysdev/uic.c @@ -97,6 +97,22 @@ static void uic_ack_irq(unsigned int virq) spin_unlock_irqrestore(&uic->lock, flags); } +static void uic_mask_ack_irq(unsigned int virq) +{ + struct uic *uic = get_irq_chip_data(virq); + unsigned int src = uic_irq_to_hw(virq); + unsigned long flags; + u32 er, sr; + + sr = 1 << (31-src); + spin_lock_irqsave(&uic->lock, flags); + er = mfdcr(uic->dcrbase + UIC_ER); + er &= ~sr; + mtdcr(uic->dcrbase + UIC_ER, er); + mtdcr(uic->dcrbase + UIC_SR, sr); + spin_unlock_irqrestore(&uic->lock, flags); +} + static int uic_set_irq_type(unsigned int virq, unsigned int flow_type) { struct uic *uic = get_irq_chip_data(virq); @@ -152,7 +168,7 @@ static struct irq_chip uic_irq_chip = { .typename = " UIC ", .unmask = uic_unmask_irq, .mask = uic_mask_irq, -/* .mask_ack = uic_mask_irq_and_ack, */ + .mask_ack = uic_mask_ack_irq, .ack = uic_ack_irq, .set_type = uic_set_irq_type, }; |