提交 c61fae96 编写于 作者: J Julia Lawall 提交者: Greg Kroah-Hartman

serial: drivers/serial/pmac_zilog.c: add missing unlock

In an error handling case the lock is not unlocked.

A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression E1;
identifier f;
@@

f (...) { <+...
* spin_lock_irqsave (E1,...);
... when != E1
* return ...;
...+> }
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
上级 d9901660
......@@ -752,8 +752,10 @@ static void pmz_break_ctl(struct uart_port *port, int break_state)
uap->curregs[R5] = new_reg;
/* NOTE: Not subject to 'transmitter active' rule. */
if (ZS_IS_ASLEEP(uap))
if (ZS_IS_ASLEEP(uap)) {
spin_unlock_irqrestore(&port->lock, flags);
return;
}
write_zsreg(uap, R5, uap->curregs[R5]);
}
......
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