diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2017-06-06 15:24:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-09 11:42:41 +0200 |
| commit | df1421b5f72979e48096f68c253f59aa7e8e7468 (patch) | |
| tree | 5a456484095181ef3a2cb3bb0152b377fa707200 /drivers/thunderbolt | |
| parent | 08a5e4cebec543bfa4a6d119fc18f0ed8fd9d8ce (diff) | |
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>
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/eeprom.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/thunderbolt/eeprom.c b/drivers/thunderbolt/eeprom.c index 6392990c984d..e4e64b130514 100644 --- a/drivers/thunderbolt/eeprom.c +++ b/drivers/thunderbolt/eeprom.c @@ -276,6 +276,9 @@ int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid) if (res) return res; + if (drom_offset == 0) + return -ENODEV; + /* read uid */ res = tb_eeprom_read_n(sw, drom_offset, data, 9); if (res) |