提交 8f56a31a 编写于 作者: I Ingo Molnar 提交者: Linus Torvalds

[PATCH] drivers/char/esp.c spinlock fix

There's incorrect spinlock usage in espserial_init(): autoconfig() uses
info->lock before it's initialized.  The fix is to initialize the spinlock
earlier.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 fd279197
......@@ -2492,6 +2492,7 @@ static int __init espserial_init(void)
}
memset((void *)info, 0, sizeof(struct esp_struct));
spin_lock_init(&info->lock);
/* rx_trigger, tx_trigger are needed by autoconfig */
info->config.rx_trigger = rx_trigger;
info->config.tx_trigger = tx_trigger;
......@@ -2528,7 +2529,6 @@ static int __init espserial_init(void)
init_waitqueue_head(&info->close_wait);
init_waitqueue_head(&info->delta_msr_wait);
init_waitqueue_head(&info->break_wait);
spin_lock_init(&info->lock);
ports = info;
printk(KERN_INFO "ttyP%d at 0x%04x (irq = %d) is an ESP ",
info->line, info->port, info->irq);
......
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