[Bluetooth] Eliminate checks for impossible conditions in IRQ handler

Our info structure and info->hdev is always passed to the IRQ handler,
so we don't have to worry about these checks in every interrupt.

Leave a BUG_ON() just to help unwary programmers, but these could
probably be removed as well.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/bluetooth/btuart_cs.c b/drivers/bluetooth/btuart_cs.c
index d7d2ea0d86a1..08f48d577aba 100644
--- a/drivers/bluetooth/btuart_cs.c
+++ b/drivers/bluetooth/btuart_cs.c
@@ -294,10 +294,7 @@ static irqreturn_t btuart_interrupt(int irq, void *dev_inst)
         int boguscount = 0;
         int iir, lsr;
 
-        if (!info || !info->hdev) {
-                BT_ERR("Call of irq %d for unknown device", irq);
-                return IRQ_NONE;
-        }
+        BUG_ON(!info->hdev);
 
         iobase = info->p_dev->io.BasePort1;