From: Evgeny Novikov <novikov@ispras.ru>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Evgeny Novikov <novikov@ispras.ru>,
linux-usb@vger.kernel.org (open list:USB SUBSYSTEM),
linux-kernel@vger.kernel.org, ldv-project@linuxtesting.org
Subject: [PATCH] USB: lvtest: return proper error code in probe
Date: Wed, 5 Aug 2020 12:06:43 +0300 [thread overview]
Message-ID: <20200805090643.3432-1-novikov@ispras.ru> (raw)
lvs_rh_probe() can return some nonnegative value from usb_control_msg()
when it is less than "USB_DT_HUB_NONVAR_SIZE + 2" that is considered as
a failure. Make lvs_rh_probe() return -EINVAL in this case.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
---
drivers/usb/misc/lvstest.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/misc/lvstest.c b/drivers/usb/misc/lvstest.c
index 407fe7570f3b..f8686139d6f3 100644
--- a/drivers/usb/misc/lvstest.c
+++ b/drivers/usb/misc/lvstest.c
@@ -426,7 +426,7 @@ static int lvs_rh_probe(struct usb_interface *intf,
USB_DT_SS_HUB_SIZE, USB_CTRL_GET_TIMEOUT);
if (ret < (USB_DT_HUB_NONVAR_SIZE + 2)) {
dev_err(&hdev->dev, "wrong root hub descriptor read %d\n", ret);
- return ret;
+ return ret < 0 ? ret : -EINVAL;
}
/* submit urb to poll interrupt endpoint */
--
2.26.2
reply other threads:[~2020-08-05 9:06 UTC|newest]
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