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* md: do not count blocked devices as sparesDan Williams2008-07-28
| | | | | | | | remove_and_add_spares() assumes that failed devices have been hot-removed from the array. Removal is skipped in the 'blocked' case so do not count a device in this state as 'spare'. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* md: do not progress the resync process if the stripe was blockedDan Williams2008-07-28
| | | | | | | handle_stripe will take no action on a stripe when waiting for userspace to unblock the array, so do not report completed sectors. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* md: delay notification of 'active_idle' to the recovery threadDan Williams2008-07-23
| | | | | | sysfs_notify might sleep, so do not call it from md_safemode_timeout. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* md: fix merge errorDan Williams2008-07-23
| | | | | | | | | | | | | | | | | | | | | | | The original STRIPE_OP_IO removal patch had the following hunk: - for (i = conf->raid_disks; i--; ) { + for (i = conf->raid_disks; i--; ) set_bit(R5_Wantwrite, &sh->dev[i].flags); - if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending)) - sh->ops.count++; - } However it appears the hunk became broken after merging: - for (i = conf->raid_disks; i--; ) { + for (i = conf->raid_disks; i--; ) set_bit(R5_Wantwrite, &sh->dev[i].flags); set_bit(R5_LOCKED, &dev->flags); s.locked++; - if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending)) - sh->ops.count++; - } Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* md: move async_tx_issue_pending_all outside spin_lock_irqDan Williams2008-07-23
| | | | | | | | | Some dma drivers need to call spin_lock_bh in their device_issue_pending routines. This change avoids: WARNING: at kernel/softirq.c:136 local_bh_enable_ip+0x3a/0x85() Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* md: Protect access to mddev->disks list using RCUNeilBrown2008-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All modifications and most access to the mddev->disks list are made under the reconfig_mutex lock. However there are three places where the list is walked without any locking. If a reconfig happens at this time, havoc (and oops) can ensue. So use RCU to protect these accesses: - wrap them in rcu_read_{,un}lock() - use list_for_each_entry_rcu - add to the list with list_add_rcu - delete from the list with list_del_rcu - delay the 'free' with call_rcu rather than schedule_work Note that export_rdev did a list_del_init on this list. In almost all cases the entry was not in the list anymore so it was a no-op and so safe. It is no longer safe as after list_del_rcu we may not touch the list_head. An audit shows that export_rdev is called: - after unbind_rdev_from_array, in which case the delete has already been done, - after bind_rdev_to_array fails, in which case the delete isn't needed. - before the device has been put on a list at all (e.g. in add_new_disk where reading the superblock fails). - and in autorun devices after a failure when the device is on a different list. So remove the list_del_init call from export_rdev, and add it back immediately before the called to export_rdev for that last case. Note also that ->same_set is sometimes used for lists other than mddev->list (e.g. candidates). In these cases rcu is not needed. Signed-off-by: NeilBrown <neilb@suse.de>
* md: only count actual openers as access which prevent a 'stop'NeilBrown2008-07-21
| | | | | | | | | Open isn't the only thing that increments ->active. e.g. reading /proc/mdstat will increment it briefly. So to avoid false positives in testing for concurrent access, introduce a new counter that counts just the number of times the md device it open. Signed-off-by: NeilBrown <neilb@suse.de>
* md: linear: Make array_size sector-based and rename it to array_sectors.Andre Noll2008-07-21
| | | | | Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: NeilBrown <neilb@suse.de>
* md: Make mddev->array_size sector-based.Andre Noll2008-07-21
| | | | | | | | | This patch renames the array_size field of struct mddev_s to array_sectors and converts all instances to use units of 512 byte sectors instead of 1k blocks. Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: NeilBrown <neilb@suse.de>
* md: Make super_type->rdev_size_change() take sector-based sizes.Andre Noll2008-07-21
| | | | | | | | Also, change the type of the size parameter from unsigned long long to sector_t and rename it to num_sectors. Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: NeilBrown <neilb@suse.de>
* md: Fix check for overlapping devices.Andre Noll2008-07-21
| | | | | | | | | | | | | The checks in overlaps() expect all parameters either in block-based or sector-based quantities. However, its single caller passes two rdev->data_offset arguments as well as two rdev->size arguments, the former being sector counts while the latter are measured in 1K blocks. This could cause rdev_size_store() to accept an invalid size from user space. Fix it by passing only sector-based quantities to overlaps(). Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: NeilBrown <neilb@suse.de>
* md: Tidy up rdev_size_store a bit:Neil Brown2008-07-21
| | | | | | | | | | | | | | | - used strict_strtoull in place of simple_strtoull - use my_mddev in place of rdev->mddev (they have the same value) and more significantly, - don't adjust mddev->size to fit, rather reject changes which make rdev->size smaller than mddev->size Adjusting mddev->size is a hangover from bind_rdev_to_array which does a similar thing. But it really is a better design to insist that mddev->size is set as required, then the rdev->sizes are set to allow for that. The previous way invites confusion. Signed-off-by: NeilBrown <neilb@suse.de>
* md: Remove some unused macros.Andre Noll2008-07-11
| | | | | Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Neil Brown <neilb@suse.de>
* md: Turn rdev->sb_offset into a sector-based quantity.Andre Noll2008-07-11
| | | | | | | Rename it to sb_start to make sure all users have been converted. Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Neil Brown <neilb@suse.de>
* md: Make calc_dev_sboffset() return a sector count.Andre Noll2008-07-11
| | | | | | | | | | | | As BLOCK_SIZE_BITS is 10 and MD_NEW_SIZE_SECTORS(2 * x) = 2 * NEW_SIZE_BLOCKS(x), the return value of calc_dev_sboffset() doubles. Fix up all three callers accordingly. Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Neil Brown <neilb@suse.de>
* md: Replace calc_dev_size() by calc_num_sectors().Andre Noll2008-07-11
| | | | | | | | | Number of sectors is the preferred unit for sizes of raid devices, so change calc_dev_size() so that it returns this unit instead of the number of 1K blocks. Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Neil Brown <neilb@suse.de>
* md: Make update_size() take the number of sectors.Andre Noll2008-07-11
| | | | | | | | | | | | | | Changing the internal representations of sizes of raid devices from 1K blocks to sector counts (512B units) is desirable because it allows to get rid of many divisions/multiplications and unnecessary casts that are present in the current code. This patch is a first step in this direction. It replaces the old 1K-based "size" argument of update_size() by "num_sectors" and fixes up its two callers. Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Neil Brown <neilb@suse.de>
* md: Better control of when do_md_stop is allowed to stop the array.Neil Brown2008-07-11
| | | | | | | | | | | | | do_md_stop check the number of active users before allowing the array to be stopped. Two problems: 1/ it assumes the request is coming through an open file descriptor (via ioctl) so it allows for that. This is not always the case. 2/ it doesn't do the check it the array hasn't been activated. This is not good for cases when we use an inactive array to hold some devices in a container. Signed-off-by: Neil Brown <neilb@suse.de>
* md: get_disk_info(): Don't convert between signed and unsigned and back.Andre Noll2008-07-11
| | | | | | | | | The current code copies a signed int from user space, converts it to unsigned and passes the unsigned value to find_rdev_nr() which expects a signed value. Simply pass the signed value from user space directly. Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Neil Brown <neilb@suse.de>
* md: Simplify restart_array().Andre Noll2008-07-11
| | | | | Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Neil Brown <neilb@suse.de>
* md: alloc_disk_sb(): Return proper error value.Andre Noll2008-07-11
| | | | | | | | If alloc_page() fails, ENOMEM is a more suitable error value than EINVAL. Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Neil Brown <neilb@suse.de>
* md: Simplify sb_equal().Andre Noll2008-07-11
| | | | | | | | The only caller of sb_equal() tests the return value against zero, so it's OK to return the negated return value of memcmp(). Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Neil Brown <neilb@suse.de>
* md: Simplify uuid_equal().Andre Noll2008-07-11
| | | | | Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Neil Brown <neilb@suse.de>
* Merge branch 'master' into for-nextNeil Brown2008-07-11
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| * Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2008-07-10
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (27 commits) tun: Persistent devices can get stuck in xoff state xfrm: Add a XFRM_STATE_AF_UNSPEC flag to xfrm_usersa_info ipv6: missed namespace context in ipv6_rthdr_rcv netlabel: netlink_unicast calls kfree_skb on error path by itself ipv4: fib_trie: Fix lookup error return tcp: correct kcalloc usage ip: sysctl documentation cleanup Documentation: clarify tcp_{r,w}mem sysctl docs netfilter: nf_nat_snmp_basic: fix a range check in NAT for SNMP netfilter: nf_conntrack_tcp: fix endless loop libertas: fix memory alignment problems on the blackfin zd1211rw: stop beacons on remove_interface rt2x00: Disable synchronization during initialization rc80211_pid: Fix fast_start parameter handling sctp: Add documentation for sctp sysctl variable ipv6: fix race between ipv6_del_addr and DAD timer irda: Fix netlink error path return value irda: New device ID for nsc-ircc irda: via-ircc proper dma freeing sctp: Mark the tsn as received after all allocations finish ...
| | * tun: Persistent devices can get stuck in xoff stateMax Krasnyansky2008-07-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The scenario goes like this. App stops reading from tun/tap. TX queue gets full and driver does netif_stop_queue(). App closes fd and TX queue gets flushed as part of the cleanup. Next time the app opens tun/tap and starts reading from it but the xoff state is not cleared. We're stuck. Normally xoff state is cleared when netdev is brought up. But in the case of persistent devices this happens only during initial setup. The fix is trivial. If device is already up when an app opens it we clear xoff state and that gets things moving again. Signed-off-by: Max Krasnyansky <maxk@qualcomm.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * xfrm: Add a XFRM_STATE_AF_UNSPEC flag to xfrm_usersa_infoSteffen Klassert2008-07-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a XFRM_STATE_AF_UNSPEC flag to handle the AF_UNSPEC behavior for the selector family. Userspace applications can set this flag to leave the selector family of the xfrm_state unspecified. This can be used to to handle inter family tunnels if the selector is not set from userspace. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * ipv6: missed namespace context in ipv6_rthdr_rcvDenis V. Lunev2008-07-10
| | | | | | | | | | | | | | | Signed-off-by: Denis V. Lunev <den@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * netlabel: netlink_unicast calls kfree_skb on error path by itselfDenis V. Lunev2008-07-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | So, no need to kfree_skb here on the error path. In this case we can simply return. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * ipv4: fib_trie: Fix lookup error returnBen Hutchings2008-07-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In commit a07f5f508a4d9728c8e57d7f66294bf5b254ff7f "[IPV4] fib_trie: style cleanup", the changes to check_leaf() and fn_trie_lookup() were wrong - where fn_trie_lookup() would previously return a negative error value from check_leaf(), it now returns 0. Now fn_trie_lookup() doesn't appear to care about plen, so we can revert check_leaf() to returning the error value. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Tested-by: William Boughton <bill@boughton.de> Acked-by: Stephen Heminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * tcp: correct kcalloc usageMilton Miller2008-07-10
| | | | | | | | | | | | | | | | | | | | | | | | kcalloc is supposed to be called with the count as its first argument and the element size as the second. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * ip: sysctl documentation cleanupStephen Hemminger2008-07-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reduced version of the spelling cleanup patch. Take out the confusing language in tcp_frto, and organize the undocumented values. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * Documentation: clarify tcp_{r,w}mem sysctl docsJ. Bruce Fields2008-07-10
| | | | | | | | | | | | | | | | | | | | | Fix some of the defaults and attempt to clarify some language. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * Merge branch 'master' of ↵David S. Miller2008-07-09
| | |\ | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
| | | * libertas: fix memory alignment problems on the blackfinIhar Hrachyshka2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixing unaligned memory access on the blackfin architecture. Signed-off-by: Ihar Hrachyshka <ihar.hrachyshka@promwad.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | | * zd1211rw: stop beacons on remove_interfaceLuis Carlos Cobo2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a mesh or ad-hoc interface is brought up and later it is replaced by managed interface, the managed interface will keep transmitting the beacons that were configured for the former interface. This patch fixes that behaviour. Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | | * rt2x00: Disable synchronization during initializationIvo van Doorn2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As soon as init_registers() was called, the rt2400/rt2500 would start raising beacondone interrupts. Since this is highly premature since no beacons were provided yet, we should initialize the synchronization register to 0. This will make all drivers initialize it to 0 regardless if they are raising beacondone interrupts or not, since it only makes sense to have it completely disabled. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | | * rc80211_pid: Fix fast_start parameter handlingMattias Nissler2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This removes the fast_start parameter from the rc_pid parameters information and instead uses the parameter macro when initializing the rc_pid state. Since the parameter is only used on initialization, there is no point of making exporting it via debugfs. This also fixes uninitialized memory references to the fast_start and norm_offset parameters detected by the kmemcheck utility. Thanks to Vegard Nossum for reporting the bug. Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | netfilter: nf_nat_snmp_basic: fix a range check in NAT for SNMPDavid Howells2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a range check in netfilter IP NAT for SNMP to always use a big enough size variable that the compiler won't moan about comparing it to ULONG_MAX/8 on a 64-bit platform. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * | netfilter: nf_conntrack_tcp: fix endless loopPatrick McHardy2008-07-09
| | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a conntrack entry is destroyed in process context and destruction is interrupted by packet processing and the packet is an attempt to reopen a closed connection, TCP conntrack tries to kill the old entry itself and returns NF_REPEAT to pass the packet through the hook again. This may lead to an endless loop: TCP conntrack repeatedly finds the old entry, but can not kill it itself since destruction is already in progress, but destruction in process context can not complete since TCP conntrack is keeping the CPU busy. Drop the packet in TCP conntrack if we can't kill the connection ourselves to avoid this. Reported by: hemao77@gmail.com [ Kernel bugzilla #11058 ] Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * sctp: Add documentation for sctp sysctl variableVlad Yasevich2008-07-08
| | | | | | | | | | | | | | | | | | Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * ipv6: fix race between ipv6_del_addr and DAD timerAndrey Vagin2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Consider the following scenario: ipv6_del_addr(ifp) ipv6_ifa_notify(RTM_DELADDR, ifp) ip6_del_rt(ifp->rt) after returning from the ipv6_ifa_notify and enabling BH-s back, but *before* calling the addrconf_del_timer the ifp->timer fires and: addrconf_dad_timer(ifp) addrconf_dad_completed(ifp) ipv6_ifa_notify(RTM_NEWADDR, ifp) ip6_ins_rt(ifp->rt) then return back to the ipv6_del_addr and: in6_ifa_put(ifp) inet6_ifa_finish_destroy(ifp) dst_release(&ifp->rt->u.dst) After this we have an ifp->rt inserted into fib6 lists, but queued for gc, which in turn can result in oopses in the fib6_run_gc. Maybe some other nasty things, but we caught only the oops in gc so far. The solution is to disarm the ifp->timer before flushing the rt from it. Signed-off-by: Andrey Vagin <avagin@parallels.com> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * irda: Fix netlink error path return valueJulius Volz2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix an incorrect return value check of genlmsg_put() in irda_nl_get_mode(). genlmsg_put() does not use ERR_PTR() to encode return values, it just returns NULL on error. Signed-off-by: Julius Volz <juliusv@google.com> Signed-off-by: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * irda: New device ID for nsc-irccVille Syrjala2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | HP OmniBook 500's DSDT code changes the HID of the FIR device from NSC6001 to HWPC224 when run under an "NT" operating system. Add the new ID to the pnp device id table. Signed-off-by: Ville Syrjala <syrjala@sci.fi> Signed-off-by: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * irda: via-ircc proper dma freeingWang Chen2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | 1. dma should be freed when dma2 request fail. 2. dma2 should be freed too when device close. Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com> Signed-off-by: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * sctp: Mark the tsn as received after all allocations finishVlad Yasevich2008-07-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we don't have the buffer space or memory allocations fail, the data chunk is dropped, but TSN is still reported as received. This introduced a data loss that can't be recovered. We should only mark TSNs are received after memory allocations finish. The one exception is the invalid stream identifier, but that's due to user error and is reported back to the user. This was noticed by Michael Tuexen. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * mac80211: don't report selected IBSS when not foundVladimir Koutny2008-07-07
| | | | | | | | | | | | | | | | | | | | | Don't report a 'selected' IBSS in sta_find_ibss when none was found. Signed-off-by: Vladimir Koutny <vlado@ksp.sk> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * ssb-pcicore: Fix IRQ-vector init on embedded devicesMichael Buesch2008-07-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | On embedded devices we must not route the interrupts through the PCI core, if our host-bus is not PCI. Reported-by: Steve Brown <sbrown@cortland.com> Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * zd1211rw: add ID for AirTies WUS-201Firat Birlik2008-07-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | I would like to inform you of our zd1211 based usb wifi adapter (AirTies WUS-201), which works with the zd1211rw driver with the following device id definition. Signed-off-by: Daniel Drake <dsd@gentoo.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * mac80211: Only flush workqueue when last interface was removedIvo van Doorn2008-07-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the ieee80211_hw->workqueue is flushed each time an interface is being removed. However most scheduled work is not interface specific but device specific, for example things like periodic work for link tuners. This patch will move the flush_workqueue() call to directly behind the call to ops->stop() to make sure the workqueue is only flushed when all interfaces are gone and there really shouldn't be any scheduled work in the drivers left. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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