diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2016-05-27 17:08:33 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2016-06-16 18:06:08 +0300 |
| commit | 2683f7dd9aaddf2ab8d41fe597bfffda2d6f4ab6 (patch) | |
| tree | 87ec0f865a6005db53e08256fdc0eb2031f995f0 /drivers | |
| parent | 5e94913f676af0dddeb6e0f3de241de5bd92f3f1 (diff) | |
| download | linux-2683f7dd9aaddf2ab8d41fe597bfffda2d6f4ab6.tar.bz2 | |
wl3501_cs: avoid bogus gcc-6 warning
gcc-6 on x86 started warning about wl3501_get_encode when building
with -O2:
drivers/net/wireless/wl3501_cs.c: In function ‘wl3501_get_encode’:
drivers/net/wireless/wl3501_cs.c:1769:5: warning: ‘implemented’ may be used uninitialized in this function
drivers/net/wireless/wl3501_cs.c:1686:19: warning: ‘threshold’ may be used uninitialized in this function
drivers/net/wireless/wl3501_cs.c:1702:20: warning: ‘threshold’ may be used uninitialized in this function
drivers/net/wireless/wl3501_cs.c:1719:23: warning: ‘txpow’ may be used uninitialized in this function
drivers/net/wireless/wl3501_cs.c:1752:20: warning: ‘retry’ may be used uninitialized in this function
drivers/net/wireless/wl3501_cs.c:1806:25: warning: ‘pwr_state’ may be used uninitialized in this function
drivers/net/wireless/wl3501_cs.c:1383:24: warning: ‘value’ may be used uninitialized in this function
I could not figure out what exactly confuses gcc here, but splitting the
wl3501_get_mib_value function into two helps the compiler to figure out
that the variables are not actually used uninitialized, and makes it
slightly clearer to a human reader what the function actually does and
which parts of it are under the spinlock.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/wl3501_cs.c | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/drivers/net/wireless/wl3501_cs.c b/drivers/net/wireless/wl3501_cs.c index 13fd734b61ec..82d94f83b6b4 100644 --- a/drivers/net/wireless/wl3501_cs.c +++ b/drivers/net/wireless/wl3501_cs.c @@ -378,8 +378,7 @@ static int wl3501_esbq_exec(struct wl3501_card *this, void *sig, int sig_size) return rc; } -static int wl3501_get_mib_value(struct wl3501_card *this, u8 index, - void *bf, int size) +static int wl3501_request_mib(struct wl3501_card *this, u8 index, void *bf) { struct wl3501_get_req sig = { .sig_id = WL3501_SIG_GET_REQ, @@ -395,20 +394,32 @@ static int wl3501_get_mib_value(struct wl3501_card *this, u8 index, wl3501_set_to_wla(this, ptr, &sig, sizeof(sig)); wl3501_esbq_req(this, &ptr); this->sig_get_confirm.mib_status = 255; - spin_unlock_irqrestore(&this->lock, flags); - rc = wait_event_interruptible(this->wait, - this->sig_get_confirm.mib_status != 255); - if (!rc) - memcpy(bf, this->sig_get_confirm.mib_value, - size); - goto out; + rc = 0; } } spin_unlock_irqrestore(&this->lock, flags); -out: + return rc; } +static int wl3501_get_mib_value(struct wl3501_card *this, u8 index, + void *bf, int size) +{ + int rc; + + rc = wl3501_request_mib(this, index, bf); + if (rc) + return rc; + + rc = wait_event_interruptible(this->wait, + this->sig_get_confirm.mib_status != 255); + if (rc) + return rc; + + memcpy(bf, this->sig_get_confirm.mib_value, size); + return 0; +} + static int wl3501_pwr_mgmt(struct wl3501_card *this, int suspend) { struct wl3501_pwr_mgmt_req sig = { |