From 2a540edf7bb02f3e968d1ce7cb355e740ba7de13 Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Sun, 26 Aug 2012 21:34:19 +0200 Subject: [PATCH] usb: dwc3: core: memory ordering fix in close As a bitmap is used for free/used. As a device freed all memory operations must be scheduled before the bitmap is manipulated. Signed-off-by: Oliver Neukum Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 4f2ef5345392..08a5738a6e1b 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -99,6 +99,7 @@ void dwc3_put_device_id(int id) ret = test_bit(id, dwc3_devs); WARN(!ret, "dwc3: ID %d not in use\n", id); + smp_mb__before_clear_bit(); clear_bit(id, dwc3_devs); } EXPORT_SYMBOL_GPL(dwc3_put_device_id); -- 2.20.1