Hi,
static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
int count)
{
int rval = -EINVAL;
struct nozomi *dc = get_dc_by_tty(tty);
struct port *port = (struct port *)tty->driver_data;
unsigned long flags;
/* DBG1( "WRITEx: %d, index = %d", count, index); */
if (!dc || !port)
return -ENODEV;
if (unlikely(down_trylock(&port->tty_sem))) {
/*
* must test lock as tty layer wraps calls
* to this function with BKL
*/
dev_err(&dc->pdev->dev, "Would have deadlocked - "
"return ERESTARTSYS\n");
return -ERESTARTSYS;
}
The use of ERESTARTSYS seems bogus to me, no signal is pending and this flag
would reach userspace (that is not permitted), am I right?
--js
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