Commit df1421b5 authored Jun 06, 2017 by Mika Westerberg Committed by Greg Kroah-Hartman Jun 09, 2017

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>

parent 08a5e4ce

drivers/thunderbolt/eeprom.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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)