sparc64: Set IRQF_DISABLED on LDC channel IRQs.

[ Upstream commit c58543c869606532c2382f027d6466f4672ea756 ]

With lots of virtual devices it's easy to generate a lot of
events and chew up the kernel IRQ stack.

Reported-by: hyl <heyongli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/arch/sparc/kernel/ldc.c b/arch/sparc/kernel/ldc.c
index adf5f273868aaf1f461a47a97f2be4b3a217518d..cb3c72c45aab441786c6ad5274cfb9aa056f735c 100644 (file)
--- a/arch/sparc/kernel/ldc.c
+++ b/arch/sparc/kernel/ldc.c
@@ -1242,13 +1242,13 @@ int ldc_bind(struct ldc_channel *lp, const char *name)
        snprintf(lp->tx_irq_name, LDC_IRQ_NAME_MAX, "%s TX", name);
 
        err = request_irq(lp->cfg.rx_irq, ldc_rx,
-                         IRQF_SAMPLE_RANDOM | IRQF_SHARED,
+                         IRQF_SAMPLE_RANDOM | IRQF_DISABLED | IRQF_SHARED,
                          lp->rx_irq_name, lp);
        if (err)
                return err;
 
        err = request_irq(lp->cfg.tx_irq, ldc_tx,
-                         IRQF_SAMPLE_RANDOM | IRQF_SHARED,
+                         IRQF_SAMPLE_RANDOM | IRQF_DISABLED | IRQF_SHARED,
                          lp->tx_irq_name, lp);
        if (err) {
                free_irq(lp->cfg.rx_irq, lp);