[PATCH 34-and-three-quarters/36] tty: gdm724x: simplify gdm_tty_write()
From: Jiri Slaby (SUSE)
Date: Thu Aug 10 2023 - 06:39:08 EST
len and remain can never be negative in gdm_tty_write(). So remove such
a check and move the check of remaining bytes to the loop condition.
This way, the preceding 'if' is now superfluous too. Fix all that and
make the code cleaner.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Cc: linux-staging@xxxxxxxxxxxxxxx
---
drivers/staging/gdm724x/gdm_tty.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/drivers/staging/gdm724x/gdm_tty.c b/drivers/staging/gdm724x/gdm_tty.c
index cbaaa8fa7474..67d9bf41e836 100644
--- a/drivers/staging/gdm724x/gdm_tty.c
+++ b/drivers/staging/gdm724x/gdm_tty.c
@@ -158,10 +158,7 @@ static ssize_t gdm_tty_write(struct tty_struct *tty, const u8 *buf, size_t len)
if (!gdm_tty_ready(gdm))
return -ENODEV;
- if (!len)
- return 0;
-
- while (1) {
+ while (remain) {
size_t sending_len = min(MUX_TX_MAX_SIZE, remain);
gdm->tty_dev->send_func(gdm->tty_dev->priv_dev,
(void *)(buf + sent_len),
@@ -171,8 +168,6 @@ static ssize_t gdm_tty_write(struct tty_struct *tty, const u8 *buf, size_t len)
gdm);
sent_len += sending_len;
remain -= sending_len;
- if (remain <= 0)
- break;
}
return len;
--
2.41.0