From: trix@redhat.com
To: michael.hennerich@analog.com, alex.aring@gmail.com,
stefan@datenfreihafen.org, davem@davemloft.net, kuba@kernel.org,
marcel@holtmann.org
Cc: linux-wpan@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, Tom Rix <trix@redhat.com>
Subject: [PATCH] ieee802154/adf7242: check status of adf7242_read_reg
Date: Sun, 2 Aug 2020 07:23:39 -0700 [thread overview]
Message-ID: <20200802142339.21091-1-trix@redhat.com> (raw)
From: Tom Rix <trix@redhat.com>
Clang static analysis reports this error
adf7242.c:887:6: warning: Assigned value is garbage or undefined
len = len_u8;
^ ~~~~~~
len_u8 is set in
adf7242_read_reg(lp, 0, &len_u8);
When this call fails, len_u8 is not set.
So check the return code.
Fixes: 7302b9d90117 ("ieee802154/adf7242: Driver for ADF7242 MAC IEEE802154")
Signed-off-by: Tom Rix <trix@redhat.com>
---
drivers/net/ieee802154/adf7242.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ieee802154/adf7242.c b/drivers/net/ieee802154/adf7242.c
index c11f32f644db..7db9cbd0f5de 100644
--- a/drivers/net/ieee802154/adf7242.c
+++ b/drivers/net/ieee802154/adf7242.c
@@ -882,7 +882,9 @@ static int adf7242_rx(struct adf7242_local *lp)
int ret;
u8 lqi, len_u8, *data;
- adf7242_read_reg(lp, 0, &len_u8);
+ ret = adf7242_read_reg(lp, 0, &len_u8);
+ if (ret)
+ return ret;
len = len_u8;
--
2.18.1
next reply other threads:[~2020-08-02 14:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-02 14:23 trix [this message]
2020-08-03 6:20 ` [PATCH] ieee802154/adf7242: check status of adf7242_read_reg Hennerich, Michael
2020-08-03 18:27 ` Stefan Schmidt
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