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speakup: Simplify spk_ttyio_out error handling. 

This avoids most code indentation

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Link: https://lore.kernel.org/r/20210126222147.3848175-4-samuel.thibault@ens-lyon.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Samuel Thibault 2021-01-26 23:21:46 +01:00 committed by Greg Kroah-Hartman
parent 4f2a81f3a8
commit 117422521e
1 changed files with 19 additions and 17 deletions
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36
drivers/accessibility/speakup/spk_ttyio.c
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@ -225,27 +225,29 @@ void spk_ttyio_unregister_ldisc(void)
static int spk_ttyio_out(struct spk_synth *in_synth, const char ch)
{
struct tty_struct *tty = in_synth->dev;
int ret;
if (in_synth->alive && tty->ops->write) {
int ret = tty->ops->write(tty, &ch, 1);
if (!in_synth->alive || !tty->ops->write)
return 0;
if (ret == 0)
/* No room */
return 0;
if (ret < 0) {
pr_warn("%s: I/O error, deactivating speakup\n",
in_synth->long_name);
/* No synth any more, so nobody will restart TTYs,
* and we thus need to do it ourselves. Now that there
* is no synth we can let application flood anyway
*/
in_synth->alive = 0;
speakup_start_ttys();
return 0;
}
ret = tty->ops->write(tty, &ch, 1);
if (ret == 0)
/* No room */
return 0;
if (ret > 0)
/* Success */
return 1;
}
pr_warn("%s: I/O error, deactivating speakup\n",
in_synth->long_name);
/* No synth any more, so nobody will restart TTYs,
* and we thus need to do it ourselves. Now that there
* is no synth we can let application flood anyway
*/
in_synth->alive = 0;
speakup_start_ttys();
return 0;
}