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| author | Mark Lord <liml@rtr.ca> | 2008-05-17 13:37:07 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2008-05-19 17:30:05 -0400 |
| commit | a44253d24a97ec3efe601267274a5fb64d8696c1 (patch) | |
| tree | 313d0c34eaff675a2924576e355a114d941fdeff /drivers/ata | |
| parent | 88e675e193159b9891c1c576de4348eaf490f5d0 (diff) | |
| download | kernel_samsung_smdk4412-a44253d24a97ec3efe601267274a5fb64d8696c1.zip kernel_samsung_smdk4412-a44253d24a97ec3efe601267274a5fb64d8696c1.tar.gz kernel_samsung_smdk4412-a44253d24a97ec3efe601267274a5fb64d8696c1.tar.bz2 | |
sata_mv: disregard masked irqs
Part four of simplifying/fixing handling of the main_irq_mask register
to resolve unexpected interrupt issues observed in 2.6.26-rc*.
Ignore masked IRQs in mv_interrupt().
This prevents "unexpected device interrupt while idle" messages.
Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/sata_mv.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index 47dae7a..eb7f3da 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -2200,20 +2200,21 @@ static irqreturn_t mv_interrupt(int irq, void *dev_instance) struct ata_host *host = dev_instance; struct mv_host_priv *hpriv = host->private_data; unsigned int handled = 0; - u32 main_irq_cause, main_irq_mask; + u32 main_irq_cause, main_irq_mask, pending_irqs; spin_lock(&host->lock); main_irq_cause = readl(hpriv->main_irq_cause_addr); main_irq_mask = readl(hpriv->main_irq_mask_addr); + pending_irqs = main_irq_cause & main_irq_mask; /* * Deal with cases where we either have nothing pending, or have read * a bogus register value which can indicate HW removal or PCI fault. */ - if ((main_irq_cause & main_irq_mask) && (main_irq_cause != 0xffffffffU)) { - if (unlikely((main_irq_cause & PCI_ERR) && HAS_PCI(host))) + if (pending_irqs && main_irq_cause != 0xffffffffU) { + if (unlikely((pending_irqs & PCI_ERR) && HAS_PCI(host))) handled = mv_pci_error(host, hpriv->base); else - handled = mv_host_intr(host, main_irq_cause); + handled = mv_host_intr(host, pending_irqs); } spin_unlock(&host->lock); return IRQ_RETVAL(handled); |