diff options
| author | Prashant Malani <pmalani@chromium.org> | 2020-10-30 01:27:32 +0300 |
|---|---|---|
| committer | Enric Balletbo i Serra <enric.balletbo@collabora.com> | 2020-11-12 23:32:08 +0300 |
| commit | 7ab5a673f4ce65875c76e9812d2e6da063b87fb7 (patch) | |
| tree | 40cfdbed6f41712552a61754d13ee3adf8393671 /drivers/platform/chrome | |
| parent | 0498710be002b35bcb43895c4133a4c4bbfd837e (diff) | |
| download | linux-7ab5a673f4ce65875c76e9812d2e6da063b87fb7.tar.xz | |
platform/chrome: cros_ec_typec: Fix remove partner logic
The cros_unregister_ports() function can be called in situations where
the partner has not been registered yet, and so its related data
structures would not have been initialized. Calling
cros_typec_remove_partner() in such a situation can lead to null pointer
dereferences. So, only call cros_typec_remove_partner() if there is a
valid registered partner pointer.
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20201029222738.482366-3-pmalani@chromium.org
Diffstat (limited to 'drivers/platform/chrome')
| -rw-r--r-- | drivers/platform/chrome/cros_ec_typec.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c index 49083e21317d..2665d8125910 100644 --- a/drivers/platform/chrome/cros_ec_typec.c +++ b/drivers/platform/chrome/cros_ec_typec.c @@ -190,7 +190,10 @@ static void cros_unregister_ports(struct cros_typec_data *typec) for (i = 0; i < typec->num_ports; i++) { if (!typec->ports[i]) continue; - cros_typec_remove_partner(typec, i); + + if (typec->ports[i]->partner) + cros_typec_remove_partner(typec, i); + usb_role_switch_put(typec->ports[i]->role_sw); typec_switch_put(typec->ports[i]->ori_sw); typec_mux_put(typec->ports[i]->mux); |