imsm: imsm_read_serial check for zero-length response

VMWare virtual disks successfully run the inquiry but return a zero response.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/super-intel.c b/super-intel.c
index 4eaca9d63047362da75f9c9bb72110fa3dfcdb38..ce9a5c1226e97b580f0b618c554decc723a1165b 100644 (file)
--- a/super-intel.c
+++ b/super-intel.c
@@ -1415,6 +1415,13 @@ static int imsm_read_serial(int fd, char *devname,
 
        /* trim leading whitespace */
        rsp_len = scsi_serial[3];
+       if (!rsp_len) {
+               if (devname)
+                       fprintf(stderr,
+                               Name ": Failed to retrieve serial for %s\n",
+                               devname);
+               return 2;
+       }
        rsp_buf = (char *) &scsi_serial[4];
        c = rsp_buf;
        while (isspace(*c))