[PATCH net] wifi: airo: avoid uninitialized warning in airo_get_rate()

Randy Dunlap
2023-07-09T13:32:00Z

Quieten a gcc (11.3.0) build error or warning by checking the function
call status and returning -EBUSY if the function call failed.
This is similar to what several other wireless drivers do for the
SIOCGIWRATE ioctl call when there is a locking problem.

drivers/net/wireless/cisco/airo.c: error: 'status_rid.currentXmitRate' is used uninitialized [-Werror=uninitialized]

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: lore.kernel.org/r/39abf2c7-24a-f167-91da-ed4c5435d1c4@linux-m68k.org
Cc: Kalle Valo <kvalo@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org
---
drivers/net/wireless/cisco/airo.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff -- a/drivers/net/wireless/cisco/airo.c b/drivers/net/wireless/cisco/airo.c
--- a/drivers/net/wireless/cisco/airo.c
+++ b/drivers/net/wireless/cisco/airo.c
@@ -6157,8 +6157,11 @@ static int airo_get_rate(struct net_devi
struct iw_param *vwrq = &wrqu->bitrate;
struct airo_info *local = dev->ml_priv;
StatusRid status_rid; /* Card status info */
+ int ret;

- readStatusRid(local, &status_rid, 1);
+ ret = readStatusRid(local, &status_rid, 1);
+ if (ret)
+ return -EBUSY;

vwrq->value = le16_to_cpu(status_rid.currentXmitRate) * 500000;
/* If more than one rate, set auto */