In this driver, both function the same way, but we want to eventually
kill off semaphores, so a completion is the better choice here.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/staging/speakup/spk_ttyio.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/speakup/spk_ttyio.c b/drivers/staging/speakup/spk_ttyio.c
index 979e3ae249c1..c92bbd05516e 100644
--- a/drivers/staging/speakup/spk_ttyio.c
+++ b/drivers/staging/speakup/spk_ttyio.c
@@ -10,7 +10,7 @@
struct spk_ldisc_data {
char buf;
- struct semaphore sem;
+ struct completion completion;
bool buf_free;
};
@@ -55,7 +55,7 @@ static int spk_ttyio_ldisc_open(struct tty_struct *tty)
if (!ldisc_data)
return -ENOMEM;
- sema_init(&ldisc_data->sem, 0);
+ init_completion(&ldisc_data->completion);
ldisc_data->buf_free = true;
speakup_tty->disc_data = ldisc_data;
@@ -95,7 +95,7 @@ static int spk_ttyio_receive_buf2(struct tty_struct *tty,
ldisc_data->buf = cp[0];
ldisc_data->buf_free = false;
- up(&ldisc_data->sem);
+ complete(&ldisc_data->completion);
return 1;
}
@@ -286,7 +286,8 @@ static unsigned char ttyio_in(int timeout)
struct spk_ldisc_data *ldisc_data = speakup_tty->disc_data;
char rv;
- if (down_timeout(&ldisc_data->sem, usecs_to_jiffies(timeout)) == -ETIME) {
+ if (wait_for_completion_timeout(&ldisc_data->completion,
+ usecs_to_jiffies(timeout)) == 0) {
if (timeout)
pr_warn("spk_ttyio: timeout (%d) while waiting for input\n",
timeout);
--
2.20.0
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