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Patch in this message | | | From | "Levin, Alexander (Sasha Levin)" <> | Subject | [PATCH AUTOSEL for-4.9 47/53] staging: greybus: add host device function pointer checks | Date | Wed, 8 Nov 2017 20:50:06 +0000 |
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From: Jason Hrycay <jhrycay@gmail.com>
[ Upstream commit f05a88a39c5b5f226e08e626998bb920723b7d85 ]
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 <jhrycay@gmail.com> Reviewed-by: Bryan O'Donoghue <pure.logic@nexus-software.ie> Acked-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> --- drivers/staging/greybus/connection.c | 6 ++++++ 1 file changed, 6 insertions(+)
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", -- 2.11.0
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