[PATCH] isdn: mISDN: remove unneeded variable 'ret'

[Yang Li]

Fix the following coccicheck warning:
./drivers/isdn/mISDN/dsp_core.c:956:6-9: Unneeded variable: "err".
Return "0" on line 1001

Reported-by: Abaci Robot <ab...@linux.alibaba.com>
Signed-off-by: Yang Li <yang....@linux.alibaba.com>
---
 drivers/isdn/mISDN/dsp_core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/isdn/mISDN/dsp_core.c b/drivers/isdn/mISDN/dsp_core.c
index 038e72a..4946ea1 100644
--- a/drivers/isdn/mISDN/dsp_core.c
+++ b/drivers/isdn/mISDN/dsp_core.c
@@ -953,7 +953,6 @@
 {
        struct dsp              *dsp = container_of(ch, struct dsp, ch);
        u_long          flags;
-       int             err = 0;
 
        if (debug & DEBUG_DSP_CTRL)
                printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd);
@@ -998,7 +997,7 @@
                module_put(THIS_MODULE);
                break;
        }
-       return err;
+       return 0;
 }
 
 static void
-- 
1.8.3.1