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tty: gdm724x: simplify gdm_tty_write() 

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@kernel.org>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Cc: linux-staging@lists.linux.dev
Link: https://lore.kernel.org/r/20230810103900.19353-1-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby (SUSE) 2023-08-10 12:39:00 +02:00 committed by Greg Kroah-Hartman
parent c70fd7c0e9
commit e67d7f60d2
1 changed files with 1 additions and 6 deletions
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7
drivers/staging/gdm724x/gdm_tty.c
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@ -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;