From: Jason Hrycay Date: Tue, 20 Dec 2016 20:49:27 +0000 (-0600) Subject: staging: greybus: add host device function pointer checks X-Git-Tag: v4.11-rc1~116^2~473 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f05a88a39c5b5f226e08e626998bb920723b7d85;p=karo-tx-linux.git staging: greybus: add host device function pointer checks Add sanity checks for cport_quiesce and cport_clear before invoking the callbacks as these function pointers are not required during the host device registration. This follows the logic implemented elsewhere for various other function pointers. Signed-off-by: Jason Hrycay Reviewed-by: Bryan O'Donoghue Acked-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/greybus/connection.c b/drivers/staging/greybus/connection.c index 557075147f2d..1bf0ee403106 100644 --- a/drivers/staging/greybus/connection.c +++ b/drivers/staging/greybus/connection.c @@ -357,6 +357,9 @@ static int gb_connection_hd_cport_quiesce(struct gb_connection *connection) size_t peer_space; int ret; + if (!hd->driver->cport_quiesce) + return 0; + peer_space = sizeof(struct gb_operation_msg_hdr) + sizeof(struct gb_cport_shutdown_request); @@ -380,6 +383,9 @@ static int gb_connection_hd_cport_clear(struct gb_connection *connection) struct gb_host_device *hd = connection->hd; int ret; + if (!hd->driver->cport_clear) + return 0; + ret = hd->driver->cport_clear(hd, connection->hd_cport_id); if (ret) { dev_err(&hd->dev, "%s: failed to clear host cport: %d\n",