greybus: es1: no BUG_ON() code, report an error and recover.

diff --git a/drivers/staging/greybus/es1-ap-usb.c b/drivers/staging/greybus/es1-ap-usb.c
index 410acd3..f23c674 100644 (file)
--- a/drivers/staging/greybus/es1-ap-usb.c
+++ b/drivers/staging/greybus/es1-ap-usb.c
@@ -116,7 +116,13 @@ static int alloc_gbuf_data(struct gbuf *gbuf, unsigned int size, gfp_t gfp_mask)
         * we will encode the cport number in the first byte of the buffer, so
         * set the second byte to be the "transfer buffer"
         */
-       BUG_ON(gbuf->cport_id > (u16)U8_MAX);
+       if (gbuf->cport_id > (u16)U8_MAX) {
+               pr_err("gbuf->cport_id is '%d' and is out of range!\n",
+                       gbuf->cport_id);
+               kfree(buffer);
+               return -EINVAL;
+       }
+
        buffer[0] = gbuf->cport_id;
        gbuf->transfer_buffer = &buffer[1];
        gbuf->transfer_buffer_length = size;