wl1271: Don't mask interrupts while handling interrupt

Don't mask firmware interrupts while processing interrupts. This allows the
interrupt handler looping to work efficiently thus reducing interrupt
processing latency.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Teemu Paasikivi <ext-teemu.3.paasikivi@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1271_main.c

@@ -424,8 +424,6 @@ static void wl1271_irq_work(struct work_struct *work)
 	if (ret < 0)
 		goto out;
 
-	wl1271_write32(wl, ACX_REG_INTERRUPT_MASK, WL1271_ACX_INTR_ALL);
-
 	wl1271_fw_status(wl, wl->fw_status);
 	intr = le32_to_cpu(wl->fw_status->intr);
 	if (!intr) {
@@ -464,8 +462,6 @@ static void wl1271_irq_work(struct work_struct *work)
 	}
 
 out_sleep:
-	wl1271_write32(wl, ACX_REG_INTERRUPT_MASK,
-		       WL1271_ACX_INTR_ALL & ~(WL1271_INTR_MASK));
 	wl1271_ps_elp_sleep(wl);
 
 out: