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cmd: usb: ignore blk, emulation devices in usb tree/info display

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Usb tree/info commands iterate over all usb uclass devices recursively.
Blk uclass devices based on struct blk_desc are created for mass storage
device, treating them as usb uclass devices based on struct usb_device
and referencing usb config interface descriptors cause crash.
To fix, ignore blk and usb_emul uclass devices in usb_show_info
and usb_tree_graph. Also avoid addition of preamble for blk uclass
child devices, otherwise tree dump gets messed up.

Signed-off-by: Suneel Garapati <suneelglinux@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Suneel Garapati 2017-10-23 17:28:40 -07:00 • committed by Marek Vasut
parent 93a51d301a
commit abd7cedb19
1 changed files with 19 additions and 3 deletions
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22
cmd/usb.c
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@ -349,6 +349,16 @@ static void usb_show_tree_graph(struct usb_device *dev, char *pre)
printf(" %s", pre);
#ifdef CONFIG_DM_USB
has_child = device_has_active_children(dev->dev);
if (device_get_uclass_id(dev->dev) == UCLASS_MASS_STORAGE) {
struct udevice *child;
for (device_find_first_child(dev->dev, &child);
child;
device_find_next_child(&child)) {
if (device_get_uclass_id(child) == UCLASS_BLK)
has_child = 0;
}
}
#else
/* check if the device has connected children */
int i;
@ -414,8 +424,12 @@ static void usb_show_tree_graph(struct usb_device *dev, char *pre)
udev = dev_get_parent_priv(child);
/* Ignore emulators, we only want real devices */
if (device_get_uclass_id(child) != UCLASS_USB_EMUL) {
/*
* Ignore emulators and block child devices, we only want
* real devices
*/
if ((device_get_uclass_id(child) != UCLASS_USB_EMUL) &&
(device_get_uclass_id(child) != UCLASS_BLK)) {
usb_show_tree_graph(udev, pre);
pre[index] = 0;
}
@ -605,7 +619,9 @@ static void usb_show_info(struct usb_device *udev)
for (device_find_first_child(udev->dev, &child);
child;
device_find_next_child(&child)) {
if (device_active(child)) {
if (device_active(child) &&
(device_get_uclass_id(child) != UCLASS_USB_EMUL) &&
(device_get_uclass_id(child) != UCLASS_BLK)) {
udev = dev_get_parent_priv(child);
usb_show_info(udev);
}