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75 lines
2.4 KiB
75 lines
2.4 KiB
From 468c3f924f043cad7a04f4f4d5224a2c9bc886c1 Mon Sep 17 00:00:00 2001
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From: Jiri Slaby <jslaby@suse.cz>
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Date: Sun, 13 Mar 2011 06:54:31 +0000
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Subject: NET: cdc-phonet, handle empty phonet header
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Git-commit: 468c3f924f043cad7a04f4f4d5224a2c9bc886c1
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Patch-mainline: yes
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References: bnc#673992
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Currently, for N 5800 XM I get:
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cdc_phonet: probe of 1-6:1.10 failed with error -22
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It's because phonet_header is empty. Extra altsetting looks like
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there:
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E 05 24 00 01 10 03 24 ab 05 24 06 0a 0b 04 24 fd .$....$..$....$.
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E 00 .
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I don't see the header used anywhere so just check if the phonet
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descriptor is there, not the structure itself.
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Signed-off-by: Jiri Slaby <jslaby@suse.cz>
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Cc: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
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Cc: David S. Miller <davem@davemloft.net>
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Acked-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/usb/cdc-phonet.c | 9 +++------
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1 files changed, 3 insertions(+), 6 deletions(-)
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diff --git a/drivers/net/usb/cdc-phonet.c b/drivers/net/usb/cdc-phonet.c
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index 4cf4e36..f967913 100644
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--- a/drivers/net/usb/cdc-phonet.c
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+++ b/drivers/net/usb/cdc-phonet.c
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@@ -328,13 +328,13 @@ int usbpn_probe(struct usb_interface *intf, const struct usb_device_id *id)
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{
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static const char ifname[] = "usbpn%d";
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const struct usb_cdc_union_desc *union_header = NULL;
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- const struct usb_cdc_header_desc *phonet_header = NULL;
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const struct usb_host_interface *data_desc;
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struct usb_interface *data_intf;
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struct usb_device *usbdev = interface_to_usbdev(intf);
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struct net_device *dev;
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struct usbpn_dev *pnd;
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u8 *data;
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+ int phonet = 0;
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int len, err;
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data = intf->altsetting->extra;
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@@ -355,10 +355,7 @@ int usbpn_probe(struct usb_interface *intf, const struct usb_device_id *id)
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(struct usb_cdc_union_desc *)data;
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break;
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case 0xAB:
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- if (phonet_header || dlen < 5)
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- break;
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- phonet_header =
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- (struct usb_cdc_header_desc *)data;
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+ phonet = 1;
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break;
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}
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}
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@@ -366,7 +363,7 @@ int usbpn_probe(struct usb_interface *intf, const struct usb_device_id *id)
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len -= dlen;
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}
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- if (!union_header || !phonet_header)
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+ if (!union_header || !phonet)
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return -EINVAL;
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data_intf = usb_ifnum_to_if(usbdev, union_header->bSlaveInterface0);
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--
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1.7.4.1
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