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-rw-r--r--arch/mips/kernel/rtlx.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index e14ae09eda2..16d3fdecf3e 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -146,7 +146,7 @@ static void stopping(int vpe)
int rtlx_open(int index, int can_sleep)
{
- volatile struct rtlx_info **p;
+ struct rtlx_info **p;
struct rtlx_channel *chan;
enum rtlx_state state;
int ret = 0;
@@ -179,13 +179,24 @@ int rtlx_open(int index, int can_sleep)
}
}
+ smp_rmb();
if (*p == NULL) {
if (can_sleep) {
- __wait_event_interruptible(channel_wqs[index].lx_queue,
- *p != NULL,
- ret);
- if (ret)
+ DEFINE_WAIT(wait);
+
+ for (;;) {
+ prepare_to_wait(&channel_wqs[index].lx_queue, &wait, TASK_INTERRUPTIBLE);
+ smp_rmb();
+ if (*p != NULL)
+ break;
+ if (!signal_pending(current)) {
+ schedule();
+ continue;
+ }
+ ret = -ERESTARTSYS;
goto out_fail;
+ }
+ finish_wait(&channel_wqs[index].lx_queue, &wait);
} else {
printk(" *vpe_get_shared is NULL. "
"Has an SP program been loaded?\n");