From: Jiri Slaby Date: Sun, 13 Mar 2011 06:54:31 +0000 (+0000) Subject: NET: cdc-phonet, handle empty phonet header X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=468c3f924f043cad7a04f4f4d5224a2c9bc886c1;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git NET: cdc-phonet, handle empty phonet header Currently, for N 5800 XM I get: cdc_phonet: probe of 1-6:1.10 failed with error -22 It's because phonet_header is empty. Extra altsetting looks like there: E 05 24 00 01 10 03 24 ab 05 24 06 0a 0b 04 24 fd .$....$..$....$. E 00 . I don't see the header used anywhere so just check if the phonet descriptor is there, not the structure itself. Signed-off-by: Jiri Slaby Cc: Rémi Denis-Courmont Cc: David S. Miller Acked-by: Rémi Denis-Courmont Signed-off-by: David S. Miller --- diff --git a/drivers/net/usb/cdc-phonet.c b/drivers/net/usb/cdc-phonet.c index 4cf4e361c121..f967913e11bc 100644 --- a/drivers/net/usb/cdc-phonet.c +++ b/drivers/net/usb/cdc-phonet.c @@ -328,13 +328,13 @@ int usbpn_probe(struct usb_interface *intf, const struct usb_device_id *id) { static const char ifname[] = "usbpn%d"; const struct usb_cdc_union_desc *union_header = NULL; - const struct usb_cdc_header_desc *phonet_header = NULL; const struct usb_host_interface *data_desc; struct usb_interface *data_intf; struct usb_device *usbdev = interface_to_usbdev(intf); struct net_device *dev; struct usbpn_dev *pnd; u8 *data; + int phonet = 0; int len, err; data = intf->altsetting->extra; @@ -355,10 +355,7 @@ int usbpn_probe(struct usb_interface *intf, const struct usb_device_id *id) (struct usb_cdc_union_desc *)data; break; case 0xAB: - if (phonet_header || dlen < 5) - break; - phonet_header = - (struct usb_cdc_header_desc *)data; + phonet = 1; break; } } @@ -366,7 +363,7 @@ int usbpn_probe(struct usb_interface *intf, const struct usb_device_id *id) len -= dlen; } - if (!union_header || !phonet_header) + if (!union_header || !phonet) return -EINVAL; data_intf = usb_ifnum_to_if(usbdev, union_header->bSlaveInterface0);