[dpdk-dev] [PATCH] app/testpmd: add port check before manual detach

[Thomas Monjalon <thomas@monjalon.net>]

User may try to run "port detach <port_id>"
for an already detached device.
It has been decided to protect from such usage in testpmd,
so a check was added to detach_port_device() in DPDK 19.11.
This check might be removed to allow hotplug path detaching
the device of a closed port.
Whatever will be decided in future, this check is also added
before the call to detach_port_device().

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
 app/test-pmd/cmdline.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index de7a695d74..99e4168103 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -1497,10 +1497,12 @@ static void cmd_operate_detach_port_parsed(void *parsed_result,
 {
 	struct cmd_operate_detach_port_result *res = parsed_result;
 
-	if (!strcmp(res->keyword, "detach"))
+	if (!strcmp(res->keyword, "detach")) {
+		RTE_ETH_VALID_PORTID_OR_RET(res->port_id);
 		detach_port_device(res->port_id);
-	else
+	} else {
 		printf("Unknown parameter\n");
+	}
 }
 
 cmdline_parse_token_string_t cmd_operate_detach_port_port =
-- 
2.25.0