thunderbolt: Do not try to read UID if DROM offset is read as 0
authorMika Westerberg <mika.westerberg@linux.intel.com>
Tue, 6 Jun 2017 12:24:55 +0000 (15:24 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 9 Jun 2017 09:42:41 +0000 (11:42 +0200)
commitdf1421b5f72979e48096f68c253f59aa7e8e7468
tree5a456484095181ef3a2cb3bb0152b377fa707200
parent08a5e4cebec543bfa4a6d119fc18f0ed8fd9d8ce
thunderbolt: Do not try to read UID if DROM offset is read as 0

At least Falcon Ridge when in host mode does not have any kind of DROM
available and reading DROM offset returns 0 for these. Do not try to
read DROM any further in that case.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
Reviewed-by: Michael Jamet <michael.jamet@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/thunderbolt/eeprom.c