linux-kernel - [PATCH v1 1/5] tty: rpmsg: Assign returned id to a local variable

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Date:   Mon, 25 Oct 2021 16:51:44 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>,
        linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>
Subject: [PATCH v1 1/5] tty: rpmsg: Assign returned id to a local variable

Instead of putting garbage in the data structure, assign allocated id
or an error code to a temporary variable. This makes code cleaner.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/tty/rpmsg_tty.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/rpmsg_tty.c b/drivers/tty/rpmsg_tty.c
index 813076341ffd..8c17ddbf371d 100644
--- a/drivers/tty/rpmsg_tty.c
+++ b/drivers/tty/rpmsg_tty.c
@@ -121,15 +121,16 @@ static struct rpmsg_tty_port *rpmsg_tty_alloc_cport(void)
 		return ERR_PTR(-ENOMEM);
 
 	mutex_lock(&idr_lock);
-	cport->id = idr_alloc(&tty_idr, cport, 0, MAX_TTY_RPMSG, GFP_KERNEL);
+	err = idr_alloc(&tty_idr, cport, 0, MAX_TTY_RPMSG, GFP_KERNEL);
 	mutex_unlock(&idr_lock);
 
-	if (cport->id < 0) {
-		err = cport->id;
+	if (err < 0) {
 		kfree(cport);
 		return ERR_PTR(err);
 	}
 
+	cport->id = err;
+
 	return cport;
 }
 
-- 
2.33.0