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authorDuncan Sands <baldrick@free.fr>2006-10-05 09:56:44 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2006-10-17 14:46:31 -0700
commitccf40d62c70128990cf2e8775853cc3287cd7ce3 (patch)
tree1f9ee5f3da100404be153f6d2a563b682d3f2ecc
parente4a20daa7b44ab9805979eb716f6bb7532bc67b9 (diff)
usbatm: fix tiny race
If usbatm_do_heavy_init finishes before usbatm_heavy_init writes the pid, the disconnect method could shoot down the wrong process if the pid has been recycled. Signed-off-by: Duncan Sands <baldrick@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/usb/atm/usbatm.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
index 309073f6433a..ab091fa4c86b 100644
--- a/drivers/usb/atm/usbatm.c
+++ b/drivers/usb/atm/usbatm.c
@@ -1001,6 +1001,7 @@ static int usbatm_do_heavy_init(void *arg)
daemonize(instance->driver->driver_name);
allow_signal(SIGTERM);
+ instance->thread_pid = get_current()->pid;
complete(&instance->thread_started);
@@ -1025,10 +1026,6 @@ static int usbatm_heavy_init(struct usbatm_data *instance)
return ret;
}
- mutex_lock(&instance->serialize);
- instance->thread_pid = ret;
- mutex_unlock(&instance->serialize);
-
wait_for_completion(&instance->thread_started);
return 0;