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usb: dwc3: core: memory ordering fix in close
author
Oliver Neukum
<oliver@neukum.org>
Sun, 26 Aug 2012 19:34:19 +0000
(21:34 +0200)
committer
Felipe Balbi
<balbi@ti.com>
Fri, 31 Aug 2012 09:25:21 +0000
(12:25 +0300)
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>
drivers/usb/dwc3/core.c
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diff --git
a/drivers/usb/dwc3/core.c
b/drivers/usb/dwc3/core.c
index 4f2ef5345392026c7d12e8a24e04376c04acac33..08a5738a6e1bb96f0e0f78888be3e5f639a41071 100644
(file)
--- 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);