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authorOliver Neukum <oliver@neukum.org>2012-08-26 21:34:19 +0200
committerFelipe Balbi <balbi@ti.com>2012-08-31 12:25:21 +0300
commit2a540edf7bb02f3e968d1ce7cb355e740ba7de13 (patch)
tree13a0b718c53bd92a85ccb1385712a362bb2c451e /drivers/usb/dwc3
parentc6f83f386c2f7987a344368e33e55840c12bd38f (diff)
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 <oneukum@suse.de> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3')
-rw-r--r--drivers/usb/dwc3/core.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 4f2ef534539..08a5738a6e1 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);