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dm: usb: Unbind old block devices when shutting down USB

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When 'usb start' is used, block devices are created for any USB flash sticks
and disks, etc. When 'usb stop' is used, these block devices are currently
not removed.

We don't want old block devices hanging around since they can still be
visible to U-Boot. Therefore, when USB is shut down, remove and unbind all
the block devices created by the USB subsystem.

Possibly we should unbind all devices which don't cause problems by being
unbound. Most likely we can remove everything except USB controllers, hubs
and emulators. We can consider that later.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Simon Glass 2016-03-13 08:22:33 -06:00
parent c81d0d215e
commit 9b9775687f
1 changed files with 5 additions and 1 deletions
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6
drivers/usb/host/usb-uclass.c
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@ -159,7 +159,11 @@ int usb_stop(void)
if (ret && !err)
err = ret;
}
#ifdef CONFIG_BLK
ret = blk_unbind_all(IF_TYPE_USB);
if (ret && !err)
err = ret;
#endif
#ifdef CONFIG_SANDBOX
struct udevice *dev;