MIPS: Loongson: irq.c: Misc cleanups

* Remove unnecessary 'if (int_status & (1 <<10))' statement
* s/if (foo != 0)/if (foo)/
* Remove unused 'inst_status &= ~(1 << i);' line

Signed-off-by: Shinya Kuribayashi <skuribay@pobox.com>
To: wuzhangjin@gmail.com
CC: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1433/
Acked-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 4 insertions, 7 deletions

diff --git a/arch/mips/loongson/common/irq.c b/arch/mips/loongson/common/irq.c
index 20e732831978..25a11df03482 100644
--- a/arch/mips/loongson/common/irq.c
+++ b/arch/mips/loongson/common/irq.c
@@ -21,19 +21,16 @@ void bonito_irqdispatch(void)
 
         /* workaround the IO dma problem: let cpu looping to allow DMA finish */
         int_status = LOONGSON_INTISR;
-        if (int_status & (1 << 10)) {
-                while (int_status & (1 << 10)) {
-                        udelay(1);
-                        int_status = LOONGSON_INTISR;
-                }
+        while (int_status & (1 << 10)) {
+                udelay(1);
+                int_status = LOONGSON_INTISR;
         }
 
         /* Get pending sources, masked by current enables */
         int_status = LOONGSON_INTISR & LOONGSON_INTEN;
 
-        if (int_status != 0) {
+        if (int_status) {
                 i = __ffs(int_status);
-                int_status &= ~(1 << i);
                 do_IRQ(LOONGSON_IRQ_BASE + i);
         }
 }