make mt-sosd use the newly added dispatch reason

[archipelago] / xseg / sys / kernel / segdev.c

diff --git a/xseg/sys/kernel/segdev.c b/xseg/sys/kernel/segdev.c
index 022372e..bb1a6ab 100644 (file)
--- a/xseg/sys/kernel/segdev.c
+++ b/xseg/sys/kernel/segdev.c
@@ -214,24 +214,21 @@ static ssize_t segdev_write(struct file *file, const char __user *buf,
 {
        struct segdev_file *vf = file->private_data;
        struct segdev *dev = segdev_get(vf->minor);
-       char buffer[SEGDEV_BUFSIZE];
        uint32_t portno;
        int ret = -ENODEV;
        if (!dev)
                goto out;
 
-       if (count > SEGDEV_BUFSIZE)
-               count = SEGDEV_BUFSIZE;
+       if (count != sizeof(uint32_t))
+               goto out;
 
-       ret = copy_from_user(buffer, buf, count);
+       ret = copy_from_user(&portno, buf, sizeof(uint32_t));
        if (ret < 0)
                goto out;
 
        if((count - ret) != sizeof(uint32_t))
                goto out;
 
-       portno = *(uint32_t *)buffer;
-
        ret = 0;
        if (dev->callback)
                dev->callback(dev, portno);