[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: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/esp.c b/drivers/char/esp.c
index dd5dc8f..3f3ac03 100644
--- a/drivers/char/esp.c
+++ b/drivers/char/esp.c
@@ -2492,6 +2492,7 @@
}
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 @@
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);