MIPS: IP22/IP28: Improve GIO support
- added interrupt support for GIO devices
- improved detection of GIO cards on Indigo2
- added more known GIO cards
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7055/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/sgi-ip22/ip22-int.c b/arch/mips/sgi-ip22/ip22-int.c
index 58b40ae..c66889f 100644
--- a/arch/mips/sgi-ip22/ip22-int.c
+++ b/arch/mips/sgi-ip22/ip22-int.c
@@ -119,9 +119,14 @@
} else
irq = lc0msk_to_irqnr[mask];
- /* if irq == 0, then the interrupt has already been cleared */
+ /*
+ * workaround for INT2 bug; if irq == 0, INT2 has seen a fifo full
+ * irq, but failed to latch it into status register
+ */
if (irq)
do_IRQ(irq);
+ else
+ do_IRQ(SGINT_LOCAL0 + 0);
}
static void indy_local1_irqdispatch(void)