From: Alexandra Winter Date: Tue, 10 May 2022 09:05:06 +0200 Subject: s390/ctcm: fix variable dereferenced before check Git-commit: 2c50c6867c85afee6f2b3bcbc50fc9d0083d1343 Patch-mainline: v5.18-rc7 References: git-fixes Found by cppcheck and smatch. smatch complains about drivers/s390/net/ctcm_sysfs.c:43 ctcm_buffer_write() warn: variable dereferenced before check 'priv' (see line 42) Fixes: 3c09e2647b5e ("ctcm: rename READ/WRITE defines to avoid redefinitions") Reported-by: Colin Ian King Signed-off-by: Alexandra Winter Signed-off-by: David S. Miller Acked-by: Petr Tesarik --- drivers/s390/net/ctcm_sysfs.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/s390/net/ctcm_sysfs.c +++ b/drivers/s390/net/ctcm_sysfs.c @@ -39,11 +39,12 @@ static ssize_t ctcm_buffer_write(struct struct ctcm_priv *priv = dev_get_drvdata(dev); int rc; - ndev = priv->channel[CTCM_READ]->netdev; - if (!(priv && priv->channel[CTCM_READ] && ndev)) { + if (!(priv && priv->channel[CTCM_READ] && + priv->channel[CTCM_READ]->netdev)) { CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev"); return -ENODEV; } + ndev = priv->channel[CTCM_READ]->netdev; rc = kstrtouint(buf, 0, &bs1); if (rc)