diff options
| author | Johan Hovold <johan@kernel.org> | 2017-05-10 19:18:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-24 08:11:15 +0300 |
| commit | 12bfbe157d066696a8b34406cb0e3353346f6fc6 (patch) | |
| tree | 98a25a555eefe2fda779f5507e48da414ebad65d /drivers | |
| parent | cb53a4e03b2f2341f1b24d8c6785d4ff57928f41 (diff) | |
| download | linux-12bfbe157d066696a8b34406cb0e3353346f6fc6.tar.xz | |
USB: hub: fix SS max number of ports
commit 93491ced3c87c94b12220dbac0527e1356702179 upstream.
Add define for the maximum number of ports on a SuperSpeed hub as per
USB 3.1 spec Table 10-5, and use it when verifying the retrieved hub
descriptor.
This specifically avoids benign attempts to update the DeviceRemovable
mask for non-existing ports (should we get that far).
Fixes: dbe79bbe9dcb ("USB 3.0 Hub Changes")
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/core/hub.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 8714b352e57f..f953d6d647f2 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1334,7 +1334,13 @@ static int hub_configure(struct usb_hub *hub, if (ret < 0) { message = "can't read hub descriptor"; goto fail; - } else if (hub->descriptor->bNbrPorts > USB_MAXCHILDREN) { + } + + maxchild = USB_MAXCHILDREN; + if (hub_is_superspeed(hdev)) + maxchild = min_t(unsigned, maxchild, USB_SS_MAXPORTS); + + if (hub->descriptor->bNbrPorts > maxchild) { message = "hub has too many ports!"; ret = -ENODEV; goto fail; |