[ARM] Fix "apm -s" command hang

Fix an apparant hang with the "apm -s" command.  We omitted to wake up
this process once resume had completed.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 8 insertions, 1 deletions

diff --git a/arch/arm/kernel/apm.c b/arch/arm/kernel/apm.c
index bbe98e3b860b..845af0bc1108 100644
--- a/arch/arm/kernel/apm.c
+++ b/arch/arm/kernel/apm.c
@@ -340,6 +340,7 @@ apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
                         wait_event(apm_suspend_waitqueue,
                                    as->suspend_state == SUSPEND_DONE);
                 } else {
+                        as->suspend_state = SUSPEND_WAIT;
                         up(&state_lock);
 
                         /*
@@ -349,8 +350,14 @@ apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
                          * acknowledged.
                          */
                         err = queue_suspend_event(APM_USER_SUSPEND, as);
-                        if (err < 0)
+                        if (err < 0) {
+                                /*
+                                 * Avoid taking the lock here - this
+                                 * should be fine.
+                                 */
+                                as->suspend_state = SUSPEND_NONE;
                                 break;
+                        }
 
                         if (err > 0)
                                 apm_suspend();