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authorPeng Fan <van.freenix@gmail.com>2016-06-17 14:18:11 +0800
committerMarek Vasut <marex@denx.de>2016-06-18 00:48:31 +0200
commit7839f5f8092762f048076c6c7b010c10f2ee8a0b (patch)
tree6bce194048f0a09be82743d43769f7528aa938ec /cmd/usb.c
parentef53b8c4ce2919d6685d2dc0c51a91a180433ff0 (diff)
cmd: usb: check if_type before using this device
For legacy usb storage driver, USB_MAX_STOR_DEV is defined as 7. If we only have one usb disk on board, `usb dev 0` is ok. But if `usb dev 1`, still ok, then `usb read xxx` will trigger system fault and reboot. So check if_type before using this device. Signed-off-by: Peng Fan <peng.fan@nxp.com> Cc: Simon Glass <sjg@chromium.org> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Bin Meng <bmeng.cn@gmail.com> Cc: Marek Vasut <marex@denx.de> Cc: Stefan Roese <sr@denx.de> Cc: Marcel Ziswiler <marcel.ziswiler@toradex.com> Cc: Peng Fan <peng.fan@nxp.com> Cc: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'cmd/usb.c')
-rw-r--r--cmd/usb.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/cmd/usb.c b/cmd/usb.c
index b83d3233b7..58d9db29d7 100644
--- a/cmd/usb.c
+++ b/cmd/usb.c
@@ -800,7 +800,8 @@ static int do_usb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
int dev = (int)simple_strtoul(argv[2], NULL, 10);
printf("\nUSB device %d: ", dev);
stor_dev = blk_get_devnum_by_type(IF_TYPE_USB, dev);
- if (stor_dev == NULL) {
+ if ((stor_dev == NULL) ||
+ (stor_dev->if_type == IF_TYPE_UNKNOWN)) {
printf("unknown device\n");
return 1;
}