Blackfin arch: Update adeos blackfin arch patch to 1.9-00

Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 9 insertions, 5 deletions

diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c
index 75724eee6494..7fd126564846 100644
--- a/arch/blackfin/kernel/irqchip.c
+++ b/arch/blackfin/kernel/irqchip.c
@@ -144,11 +144,15 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
 #endif
         generic_handle_irq(irq);
 
-#ifndef CONFIG_IPIPE    /* Useless and bugous over the I-pipe: IRQs are threaded. */
-        /* If we're the only interrupt running (ignoring IRQ15 which is for
-           syscalls), lower our priority to IRQ14 so that softirqs run at
-           that level.  If there's another, lower-level interrupt, irq_exit
-           will defer softirqs to that.  */
+#ifndef CONFIG_IPIPE
+        /*
+         * If we're the only interrupt running (ignoring IRQ15 which
+         * is for syscalls), lower our priority to IRQ14 so that
+         * softirqs run at that level.  If there's another,
+         * lower-level interrupt, irq_exit will defer softirqs to
+         * that. If the interrupt pipeline is enabled, we are already
+         * running at IRQ14 priority, so we don't need this code.
+         */
         CSYNC();
         pending = bfin_read_IPEND() & ~0x8000;
         other_ints = pending & (pending - 1);