4.4-stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit a39284ae9d2ad09975c8ae33f1bd0f05fbfbf6ee ]
There are only 2 callers of scif_get_new_port() and both appear to get the error handling wrong. Both treat zero returns as error, but it actually returns negative error codes and >= 0 on success.
Fixes: e9089f43c9a7 ("misc: mic: SCIF open close bind and listen APIs") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/misc/mic/scif/scif_api.c | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-)
--- a/drivers/misc/mic/scif/scif_api.c +++ b/drivers/misc/mic/scif/scif_api.c @@ -370,11 +370,10 @@ int scif_bind(scif_epd_t epd, u16 pn) goto scif_bind_exit; } } else { - pn = scif_get_new_port(); - if (!pn) { - ret = -ENOSPC; + ret = scif_get_new_port(); + if (ret < 0) goto scif_bind_exit; - } + pn = ret; }
ep->state = SCIFEP_BOUND; @@ -648,13 +647,12 @@ int __scif_connect(scif_epd_t epd, struc err = -EISCONN; break; case SCIFEP_UNBOUND: - ep->port.port = scif_get_new_port(); - if (!ep->port.port) { - err = -ENOSPC; - } else { - ep->port.node = scif_info.nodeid; - ep->conn_async_state = ASYNC_CONN_IDLE; - } + err = scif_get_new_port(); + if (err < 0) + break; + ep->port.port = err; + ep->port.node = scif_info.nodeid; + ep->conn_async_state = ASYNC_CONN_IDLE; /* Fall through */ case SCIFEP_BOUND: /*