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Message-Id: <20230825143112.16184-1-adiupina@astralinux.ru>
Date: Fri, 25 Aug 2023 17:31:12 +0300
From: Alexandra Diupina <adiupina@...ralinux.ru>
To: Zhao Qiang <qiang.zhao@....com>
Cc: Alexandra Diupina <adiupina@...ralinux.ru>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
lvc-project@...uxtesting.org
Subject: [PATCH] fsl_ucc_hdlc: add a check of the return value from hdlc_open
Process the result of hold_open() and return it from
uhdlc_open() in case of an error
It is necessary to pass the error code up the control flow,
similar to a possible error in request_irq()
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: c19b6d246a35 ("drivers/net: support hdlc function for QE-UCC")
Signed-off-by: Alexandra Diupina <adiupina@...ralinux.ru>
---
drivers/net/wan/fsl_ucc_hdlc.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
index 47c2ad7a3e42..cdd9489c712e 100644
--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c
@@ -708,6 +708,7 @@ static int uhdlc_open(struct net_device *dev)
hdlc_device *hdlc = dev_to_hdlc(dev);
struct ucc_hdlc_private *priv = hdlc->priv;
struct ucc_tdm *utdm = priv->utdm;
+ int rc = 0;
if (priv->hdlc_busy != 1) {
if (request_irq(priv->ut_info->uf_info.irq,
@@ -731,10 +732,12 @@ static int uhdlc_open(struct net_device *dev)
napi_enable(&priv->napi);
netdev_reset_queue(dev);
netif_start_queue(dev);
- hdlc_open(dev);
+ rc = hdlc_open(dev);
+ if (rc)
+ return rc;
}
- return 0;
+ return rc;
}
static void uhdlc_memclean(struct ucc_hdlc_private *priv)
--
2.30.2
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