diff options
| author | Nick Crews <ncrews@chromium.org> | 2019-03-11 18:58:38 +0300 |
|---|---|---|
| committer | Benson Leung <bleung@chromium.org> | 2019-03-18 20:29:40 +0300 |
| commit | 6f8f89ce1e18de1e391c9c1c14e7738881d1c00c (patch) | |
| tree | e17e26e215c3fb454afa41633ab4408f04f36b2c /drivers/platform | |
| parent | 2794449576a6024e203eca5cc2c1a3ae33102b8e (diff) | |
| download | linux-6f8f89ce1e18de1e391c9c1c14e7738881d1c00c.tar.xz | |
platform/chrome: Fix locking pattern in wilco_ec_mailbox()
Before, ec->data_buffer could be written to from multiple
contexts at the same time. Since the ec is shared data,
it needs to be inside the mutex as well.
Fixes: 7b3d4f44abf0 ("platform/chrome: Add new driver for Wilco EC")
Signed-off-by: Nick Crews <ncrews@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/chrome/wilco_ec/mailbox.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/platform/chrome/wilco_ec/mailbox.c b/drivers/platform/chrome/wilco_ec/mailbox.c index f6ff29a11f1a..14355668ddfa 100644 --- a/drivers/platform/chrome/wilco_ec/mailbox.c +++ b/drivers/platform/chrome/wilco_ec/mailbox.c @@ -223,11 +223,11 @@ int wilco_ec_mailbox(struct wilco_ec_device *ec, struct wilco_ec_message *msg) msg->command, msg->type, msg->flags, msg->response_size, msg->request_size); + mutex_lock(&ec->mailbox_lock); /* Prepare request packet */ rq = ec->data_buffer; wilco_ec_prepare(msg, rq); - mutex_lock(&ec->mailbox_lock); ret = wilco_ec_transfer(ec, msg, rq); mutex_unlock(&ec->mailbox_lock); |