diff options
| author | Dong Du <Dd_nirvana@sjtu.edu.cn> | 2021-08-27 22:46:28 +0800 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-09-03 11:59:35 +0530 |
| commit | 1718b1642ee8c31eb2c49d78b5834e06f3324394 (patch) | |
| tree | 9be55a03f345e11b6bd3fa1d2626e3d28ec621f1 /lib | |
| parent | c2623065331a9ae93f7dbd9d1bc7b4d46d0415a6 (diff) | |
lib: sbi: Checking fifo validness in sbi_fifo_is_empty and is_full
As other exported fifo functions, we should check whether the fifo is
valid in sbi_fifo_is_empty and sbi_fifo_is_full. To this end, this patch
changes the retval from bool to int, and the two functions will return
SBI_EINVAL in the case the fifo is invalid.
Signed-off-by: Dong Du <Dd_nirvana@sjtu.edu.cn>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/sbi/sbi_fifo.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/sbi/sbi_fifo.c b/lib/sbi/sbi_fifo.c index b2395f3..589cc18 100644 --- a/lib/sbi/sbi_fifo.c +++ b/lib/sbi/sbi_fifo.c @@ -43,10 +43,13 @@ u16 sbi_fifo_avail(struct sbi_fifo *fifo) return ret; } -bool sbi_fifo_is_full(struct sbi_fifo *fifo) +int sbi_fifo_is_full(struct sbi_fifo *fifo) { bool ret; + if (!fifo) + return SBI_EINVAL; + spin_lock(&fifo->qlock); ret = __sbi_fifo_is_full(fifo); spin_unlock(&fifo->qlock); @@ -75,10 +78,13 @@ static inline bool __sbi_fifo_is_empty(struct sbi_fifo *fifo) return (fifo->avail == 0) ? TRUE : FALSE; } -bool sbi_fifo_is_empty(struct sbi_fifo *fifo) +int sbi_fifo_is_empty(struct sbi_fifo *fifo) { bool ret; + if (!fifo) + return SBI_EINVAL; + spin_lock(&fifo->qlock); ret = __sbi_fifo_is_empty(fifo); spin_unlock(&fifo->qlock); |