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>

diff --git a/arch/mips/loongson/common/irq.c b/arch/mips/loongson/common/irq.c
index 20e7328..25a11df 100644 (file)
--- 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);
        }
 }