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| author | Arnd Bergmann <arnd@arndb.de> | 2017-09-06 16:38:58 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-09-08 06:03:54 +0300 |
| commit | eef5a7cc2a571eb2176c8b9260d4ccfc9f6be127 (patch) | |
| tree | 3f93b7efd189c7842a26af83341d597dce44edac | |
| parent | ca2c1418efe9f7fe37aa1f355efdf4eb293673ce (diff) | |
| download | linux-eef5a7cc2a571eb2176c8b9260d4ccfc9f6be127.tar.xz | |
isdn: isdnloop: fix logic error in isdnloop_sendbuf
gcc-7 found an ancient bug in the loop driver, leading to a condition that
is always false, meaning we ignore the contents of 'card->flags' here:
drivers/isdn/isdnloop/isdnloop.c:412:37: error: ?: using integer constants in boolean context, the expression will always evaluate to 'true' [-Werror=int-in-bool-context]
This changes the braces in the expression to ensure we actually
compare the flag bits, rather than comparing a constant. As Joe Perches
pointed out, an earlier patch of mine incorrectly assumed this was a
false-positive warning.
Cc: Joe Perches <joe@perches.com>
Link: https://patchwork.kernel.org/patch/9840289/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/isdn/isdnloop/isdnloop.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/isdn/isdnloop/isdnloop.c b/drivers/isdn/isdnloop/isdnloop.c index 6ffd13466b8c..e97232646ba1 100644 --- a/drivers/isdn/isdnloop/isdnloop.c +++ b/drivers/isdn/isdnloop/isdnloop.c @@ -409,7 +409,7 @@ isdnloop_sendbuf(int channel, struct sk_buff *skb, isdnloop_card *card) return -EINVAL; } if (len) { - if (!(card->flags & (channel) ? ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE)) + if (!(card->flags & (channel ? ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE))) return 0; if (card->sndcount[channel] > ISDNLOOP_MAX_SQUEUE) return 0; |