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usb: typec: Don't try to register component master without components 

This fixes NULL pointer dereference that happens if
component master is registered with empty component match
list.

Fixes: 730b49aac4 ("usb: typec: port-mapper: Convert to the component framework")
Reported-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Tested-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20220124090228.41396-3-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heikki Krogerus 2022-01-24 12:02:28 +03:00 committed by Greg Kroah-Hartman
parent 7817adb03c
commit 147ab5376f
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/typec/port-mapper.c
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@ -60,6 +60,8 @@ int typec_link_ports(struct typec_port *con)
return 0;
bus_for_each_dev(&acpi_bus_type, NULL, &arg, typec_port_match);
if (!arg.match)
return 0;
/*
* REVISIT: Now each connector can have only a single component master.