mISDN: Fix overlapping data access

Remove code rewriting a buffer by itself.
This fix bug 12970 on bugzilla.kernel.org.

Signed-off-by: Karsten Keil <keil@b1-systems.de>

1 files changed, 5 insertions, 6 deletions

diff --git a/drivers/isdn/mISDN/dsp_pipeline.c b/drivers/isdn/mISDN/dsp_pipeline.c
index ac61f198eb32..e9941678edfa 100644
--- a/drivers/isdn/mISDN/dsp_pipeline.c
+++ b/drivers/isdn/mISDN/dsp_pipeline.c
@@ -55,20 +55,19 @@ static ssize_t
 attr_show_args(struct device *dev, struct device_attribute *attr, char *buf)
 {
         struct mISDN_dsp_element *elem = dev_get_drvdata(dev);
-        ssize_t len = 0;
-        int i = 0;
+        int i;
+        char *p = buf;
 
         *buf = 0;
-        for (; i < elem->num_args; ++i)
-                len = sprintf(buf, "%sName:        %s\n%s%s%sDescription: %s\n"
-                        "\n", buf,
+        for (i = 0; i < elem->num_args; i++)
+                p += sprintf(p, "Name:        %s\n%s%s%sDescription: %s\n\n",
                           elem->args[i].name,
                           elem->args[i].def ? "Default:     " : "",
                           elem->args[i].def ? elem->args[i].def : "",
                           elem->args[i].def ? "\n" : "",
                           elem->args[i].desc);
 
-        return len;
+        return p - buf;
 }
 
 static struct device_attribute element_attributes[] = {