From: Guangguan Wang guangguan.wang@linux.alibaba.com
[ Upstream commit f3c46e41b32b6266cf60b0985c61748f53bf1c61 ]
Non blocking sendmsg will return -EAGAIN when any signal pending and no send space left, while non blocking recvmsg return -EINTR when signal pending and no data received. This may makes confused. As TCP returns -EAGAIN in the conditions described above. Align the behavior of smc with TCP.
Fixes: 846e344eb722 ("net/smc: add receive timeout check") Signed-off-by: Guangguan Wang guangguan.wang@linux.alibaba.com Reviewed-by: Tony Lu tonylu@linux.alibaba.com Acked-by: Karsten Graul kgraul@linux.ibm.com Link: https://lore.kernel.org/r/20220512030820.73848-1-guangguan.wang@linux.alibab... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/smc/smc_rx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/smc/smc_rx.c b/net/smc/smc_rx.c index 97e8369002d7..9e89bd1f706b 100644 --- a/net/smc/smc_rx.c +++ b/net/smc/smc_rx.c @@ -348,12 +348,12 @@ int smc_rx_recvmsg(struct smc_sock *smc, struct msghdr *msg, } break; } + if (!timeo) + return -EAGAIN; if (signal_pending(current)) { read_done = sock_intr_errno(timeo); break; } - if (!timeo) - return -EAGAIN; }
if (!smc_rx_data_available(conn)) {