xen/xenbus: Remove BUG_ON() when error string trucated

xenbus_va_dev_error() is for printing error, so when error string is
too long to be truncated, need not BUG_ON(), still return truncation
string is OK.

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index aa9b2fc..ca74410 100644 (file)
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -259,7 +259,6 @@ static char *error_path(struct xenbus_device *dev)
 static void xenbus_va_dev_error(struct xenbus_device *dev, int err,
                                const char *fmt, va_list ap)
 {
-       int ret;
        unsigned int len;
        char *printf_buffer = NULL;
        char *path_buffer = NULL;
@@ -270,9 +269,7 @@ static void xenbus_va_dev_error(struct xenbus_device *dev, int err,
                goto fail;
 
        len = sprintf(printf_buffer, "%i ", -err);
-       ret = vsnprintf(printf_buffer+len, PRINTF_BUFFER_SIZE-len, fmt, ap);
-
-       BUG_ON(len + ret > PRINTF_BUFFER_SIZE-1);
+       vsnprintf(printf_buffer+len, PRINTF_BUFFER_SIZE-len, fmt, ap);
 
        dev_err(&dev->dev, "%s\n", printf_buffer);