linux-kernel - [PATCH v2 19/25] usb: gadget: f_tcm: Decrement command ref count on cleanup

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Message-Id: <b0cc1bbc9a8325600419e7057e61e492db677041.1658192351.git.Thinh.Nguyen@synopsys.com>
Date:   Mon, 18 Jul 2022 18:28:04 -0700
From:   Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To:     Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dmitry Bogdanov <d.bogdanov@...ro.com>,
        Nicholas Bellinger <nab@...ux-iscsi.org>
Cc:     linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        Andrzej Pietrasiewicz <andrzej.p@...sung.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH v2 19/25] usb: gadget: f_tcm: Decrement command ref count on cleanup

We submitted the command with TARGET_SCF_ACK_KREF, which requires
acknowledgment of command completion. If the command fails, make sure to
decrement the ref count.

Fixes: cff834c16d23 ("usb-gadget/tcm: Convert to TARGET_SCF_ACK_KREF I/O krefs")
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@...opsys.com>
---
 Changes in v2:
 - New patch

 drivers/usb/gadget/function/f_tcm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/gadget/function/f_tcm.c b/drivers/usb/gadget/function/f_tcm.c
index a8a730e5126d..6cf95c9723a3 100644
--- a/drivers/usb/gadget/function/f_tcm.c
+++ b/drivers/usb/gadget/function/f_tcm.c
@@ -955,6 +955,7 @@ static void usbg_data_write_cmpl(struct usb_ep *ep, struct usb_request *req)
 	return;
 
 cleanup:
+	target_put_sess_cmd(se_cmd);
 	transport_generic_free_cmd(&cmd->se_cmd, 0);
 }
 
-- 
2.28.0