net: autoconvert trivial BKL users to private mutex
All these files use the big kernel lock in a trivial
way to serialize their private file operations,
typically resulting from an earlier semi-automatic
pushdown from VFS.
None of these drivers appears to want to lock against
other code, and they all use the BKL as the top-level
lock in their file operations, meaning that there
is no lock-order inversion problem.
Consequently, we can remove the BKL completely,
replacing it with a per-file mutex in every case.
Using a scripted approach means we can avoid
typos.
file=$1
name=$2
if grep -q lock_kernel ${file} ; then
if grep -q 'include.*linux.mutex.h' ${file} ; then
sed -i '/include.*<linux\/smp_lock.h>/d' ${file}
else
sed -i 's/include.*<linux\/smp_lock.h>.*$/include <linux\/mutex.h>/g' ${file}
fi
sed -i ${file} \
-e "/^#include.*linux.mutex.h/,$ {
1,/^\(static\|int\|long\)/ {
/^\(static\|int\|long\)/istatic DEFINE_MUTEX(${name}_mutex);
} }" \
-e "s/\(un\)*lock_kernel\>[ ]*()/mutex_\1lock(\&${name}_mutex)/g" \
-e '/[ ]*cycle_kernel_lock();/d'
else
sed -i -e '/include.*\<smp_lock.h\>/d' ${file} \
-e '/cycle_kernel_lock()/d'
fi
Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: netdev@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
isdn: autoconvert trivial BKL users to private mutex
All these files use the big kernel lock in a trivial
way to serialize their private file operations,
typically resulting from an earlier semi-automatic
pushdown from VFS.
None of these drivers appears to want to lock against
other code, and they all use the BKL as the top-level
lock in their file operations, meaning that there
is no lock-order inversion problem.
Consequently, we can remove the BKL completely,
replacing it with a per-file mutex in every case.
Using a scripted approach means we can avoid
typos.
file=$1
name=$2
if grep -q lock_kernel ${file} ; then
if grep -q 'include.*linux.mutex.h' ${file} ; then
sed -i '/include.*<linux\/smp_lock.h>/d' ${file}
else
sed -i 's/include.*<linux\/smp_lock.h>.*$/include <linux\/mutex.h>/g' ${file}
fi
sed -i ${file} \
-e "/^#include.*linux.mutex.h/,$ {
1,/^\(static\|int\|long\)/ {
/^\(static\|int\|long\)/istatic DEFINE_MUTEX(${name}_mutex);
} }" \
-e "s/\(un\)*lock_kernel\>[ ]*()/mutex_\1lock(\&${name}_mutex)/g" \
-e '/[ ]*cycle_kernel_lock();/d'
else
sed -i -e '/include.*\<smp_lock.h\>/d' ${file} \
-e '/cycle_kernel_lock()/d'
fi
Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Karsten Keil <isdn@linux-pingi.de> Cc: netdev@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
inet, inet6: make tcp_sendmsg() and tcp_sendpage() through inet_sendmsg() and inet_sendpage()
a new boolean flag no_autobind is added to structure proto to avoid the autobind
calls when the protocol is TCP. Then sock_rps_record_flow() is called int the
TCP's sendmsg() and sendpage() pathes.
macsonic_open() doesn't check sonic_open() return code. If it is error
we must free requested IRQs.
Signed-off-by: Kulikov Vasiliy <segooon@gmail.com> Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Carpenter [Sat, 10 Jul 2010 04:31:11 +0000 (04:31 +0000)]
isdn: fix strlen() usage
There was a missing "else" statement so the original code overflowed if
->master->name was too long. Also the ->slave and ->master buffers can
hold names with 9 characters and a NULL so I cleaned it up to allow
another character.
Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Carpenter [Fri, 9 Jul 2010 23:51:54 +0000 (23:51 +0000)]
9p: strlen() doesn't count the terminator
This is an off by one bug because strlen() doesn't count the NULL
terminator. We strcpy() addr into a fixed length array of size
UNIX_PATH_MAX later on.
The addr variable is the name of the device being mounted.
CC: stable@kernel.org Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Fix up TX Queue Host Flow Control to cause an Egress Queue Status Update to
be generated when we run out of TX Queue Descriptors. This will, in turn,
allow us to restart a stopped TX Queue.
Signed-off-by: Casey Leedom <leedom@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
free_irq() is called both in net_close() and cleanup_card(). Since it
is requested in at1700_probe1(), leave free_irq() only in cleanup_card()
for balance.
Signed-off-by: Kulikov Vasiliy <segooon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
cxgb4: exclude registers with read side effects from register dumps
A few registers have side effects on reads, eg FIFO pointers that
auto advance or mailboxes which change ownership when read. They are
unsafe to read so exclude them from ethtool register dumps.
Bump ethtool_regs.version to indicate the changed register set.
Signed-off-by: Dimitris Michailidis <dm@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Implement the get_rxnfc, get_rxfh_indir, and set_rxfh_indir ethtool
methods for user manipulation of the RSS table. Besides the methods
themselves the rest of the changes here store, initialize, and write
the table contents.
Signed-off-by: Dimitris Michailidis <dm@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
cxgb4: move the choice of interrupt type before net_device registration
We need to settle on the kind of interrupts we'll be using, a choice that
also impacts the number of queues, before registering and making visible
the net_devices. Move the relevant code up a bit.
Signed-off-by: Dimitris Michailidis <dm@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Matt Carlson [Sun, 11 Jul 2010 09:31:47 +0000 (09:31 +0000)]
tg3: Update version to 3.112
This patch updates the tg3 version to 3.112.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com> Reviewed-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Matt Carlson [Sun, 11 Jul 2010 09:31:46 +0000 (09:31 +0000)]
tg3: Fix some checkpatch errors
This patch fixes the following checkpatch errors:
ERROR: do not use assignment in if condition
+ if ((mss = skb_shinfo(skb)->gso_size) != 0) {
ERROR: do not use assignment in if condition
+ if ((mss = skb_shinfo(skb)->gso_size) != 0) {
ERROR: space prohibited after that '!' (ctx:BxW)
+ if (! netif_carrier_ok(tp->dev) &&
^
ERROR: space required after that ',' (ctx:VxV)
+#define GET_REG32_LOOP(base,len) \
^
ERROR: "(foo*)" should be "(foo *)"
+ memcpy(data, ((char*)&val) + b_offset, b_count);
ERROR: do not use assignment in if condition
+ if ((err = tg3_do_mem_test(tp, mem_tbl[i].offset,
Signed-off-by: Matt Carlson <mcarlson@broadcom.com> Reviewed-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Matt Carlson [Sun, 11 Jul 2010 09:31:45 +0000 (09:31 +0000)]
tg3: Revert PCIe tx glitch fix
This patch reverts commit 52cdf8526fe24f11d300b75458ddee017f3f4c88,
entitled "tg3: Prevent a PCIe tx glitch". The problem does not have
any visible side-effects and happens too early for the driver to do
anything about it. The proper place for this code is within the
device's bootcode.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com> Reviewed-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Matt Carlson [Sun, 11 Jul 2010 09:31:44 +0000 (09:31 +0000)]
tg3: Report driver version to firmware
This patch changes the code so that the driver version can be reported
to the firmware in addition to the current use.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com> Reviewed-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Matt Carlson [Sun, 11 Jul 2010 09:31:43 +0000 (09:31 +0000)]
tg3: Relax 5717 serdes restriction
tg3 is coded to refuse to attach to 5717 serdes devices. Now that the
hardware is better supported, we can relax this restriction. This patch
also fixes a recently introduced bug which will cause serdes parallel
detection not to work with 5780 class devices.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com> Reviewed-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Matt Carlson [Sun, 11 Jul 2010 09:31:41 +0000 (09:31 +0000)]
tg3: Fix single MSI-X vector coalescing
The interrupt coalescing setup code used the TG3_FLG2_USING_MSIX flag to
determine whether or not to configure the rx coalescing parameters.
This is incorrect for the single MSI-X vector case. This patch changes
the code to look at the TG3_FLG3_ENABLE_RSS instead.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com> Reviewed-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Matt Carlson [Sun, 11 Jul 2010 09:31:40 +0000 (09:31 +0000)]
tg3: Revert RSS indir tbl setup change
This patch reverts commit 2601d8a0049c8b5d29cd5adb844a305a804e505f. A
spectacular set of coincidences made it look as though the table was
setup incorrectly. The original version was correct.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com> Reviewed-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
IRQ 56 was not freed anywhere (neither in i596_open() on error nor in
i596_close()), rx_bufs were not freed if init_i596_mem() fails,
netif_stop_queue() was not called.
Signed-off-by: Kulikov Vasiliy <segooon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
If dev_alloc_skb() failed then free already allocated skbs.
remove_rx_bufs() can be called multiple times, so set rbd->skb to NULL
to avoid double free. remove_rx_bufs() was moved upwards to be seen by
init_rx_bufs().
Signed-off-by: Kulikov Vasiliy <segooon@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
be2net: Patch to determine if function is VF while running in guest OS.
When driver is loaded in guest OS, the pci variables is_virtfn and is_physfn are
both set to 0. This change uses registers in controller to determine the same.
Signed-off-by: Sarveshwar Bandi <sarveshwarb@serverengines.com> Signed-off-by: David S. Miller <davem@davemloft.net>
qlcnic: Disable admin tools interface for VF driver mode
Non privileged (VF) driver will not be able to carry out any of the FW update,
etc. operations. Disable the tools interface by not creating the sysfs nodes.
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ben Hutchings [Fri, 9 Jul 2010 09:12:41 +0000 (09:12 +0000)]
net: Document that dev_get_stats() returns the given pointer
Document that dev_get_stats() returns the same stats pointer it was
given. Remove const qualification from the returned pointer since the
caller may do what it likes with that structure.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ben Hutchings [Fri, 9 Jul 2010 09:11:52 +0000 (09:11 +0000)]
net: Get rid of rtnl_link_stats64 / net_device_stats union
In commit be1f3c2c027cc5ad735df6a45a542ed1db7ec48b "net: Enable 64-bit
net device statistics on 32-bit architectures" I redefined struct
net_device_stats so that it could be used in a union with struct
rtnl_link_stats64, avoiding the need for explicit copying or
conversion between the two. However, this is unsafe because there is
no locking required and no lock consistently held around calls to
dev_get_stats() and use of the statistics structure it returns.
In commit 28172739f0a276eb8d6ca917b3974c2edb036da3 "net: fix 64 bit
counters on 32 bit arches" Eric Dumazet dealt with that problem by
requiring callers of dev_get_stats() to provide storage for the
result. This means that the net_device::stats64 field and the padding
in struct net_device_stats are now redundant, so remove them.
Update the comment on net_device_ops::ndo_get_stats64 to reflect its
new usage.
Change dev_txq_stats_fold() to use struct rtnl_link_stats64, since
that is what all its callers are really using and it is no longer
going to be compatible with struct net_device_stats.
Eric Dumazet suggested the separate function for the structure
conversion.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Karl Hiramoto [Thu, 8 Jul 2010 20:55:30 +0000 (20:55 +0000)]
atm: propagate signal changes via notifier
Add notifier chain for changes in atm_dev.
Clients like br2684 will call register_atmdevice_notifier() to be notified of
changes. Drivers will call atm_dev_signal_change() to notify clients like
br2684 of the change.
On DSL and ATM devices it's usefull to have a know if you have a carrier
signal. netdevice LOWER_UP changes can be propagated to userspace via netlink
monitor.
Signed-off-by: Karl Hiramoto <karl@hiramoto.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Implement "Unhandled Interrupts" statistic so we can detect when the
hardware tells us that it things we have work to do but we don't find
anything ...
Signed-off-by: Casey Leedom <leedom@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
ks8842: Do the TX timeout work in workqueue context.
Currently all code that needs to be run at TX timeout is done in the
calling context, where bottom halves are disabled. Some of the code
blocks, so it needs to be done in a different context. This patch
adds in a work struct which is scheduled at TX timeout. Then the
timeout code is executed within work queue context.
Signed-off-by: Richard Röjfors <richard.rojfors@pelagicore.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ben Hutchings [Thu, 8 Jul 2010 13:36:32 +0000 (13:36 +0000)]
sfc: Remove unused field left from mis-merge
Commit eedc765ca4b19a41cf0b921a492ac08d640060d1 merged changes from
net-2.6 that added and then removed efx_nic::port_num, which was also
added in net-next-2.6. The end result should be that it is removed,
since it is now unused.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Thu, 8 Jul 2010 04:08:43 +0000 (04:08 +0000)]
bnx2: 64 bit stats on all arches
Now core network is able to handle 64 bit netdevice stats on 32 bit
arches, we can provide them for bnx2, since hardware maintains some 64
bit counters.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Fri, 9 Jul 2010 06:12:21 +0000 (23:12 -0700)]
vlan: allow TSO setting on vlan interfaces
When we need to shape traffic using low speeds, we need to
disable tso on network interface :
ethtool -K eth0.2240 tso off
It seems vlan interfaces miss the set_tso() ethtool method.
Before enabling TSO, we must check real device supports
TSO for VLAN-tagged packets and enables TSO.
Note that a TSO change on real device propagates TSO setting
on all vlans, even if admin selected a different TSO setting.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This patch makes IPV6 over IPv4 GRE tunnel propagate the transport
class field from the underlying IPV6 header to the IPV4 Type Of Service
field. Without the patch, all IPV6 packets in tunnel look the same to QoS.
This assumes that IPV6 transport class is exactly the same
as IPv4 TOS. Not sure if that is always the case? Maybe need
to mask off some bits.
The mask and shift to get tclass is copied from ipv6/datagram.c
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
The change to ndo_get_stats64 in "net: fix 64 bit counters on 32 bit arches"
missed cxgb4. Fix it.
Signed-off-by: Dimitris Michailidis <dm@chelsio.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Denis Kirjanov [Wed, 30 Jun 2010 23:45:52 +0000 (23:45 +0000)]
cxgb4: Use kfree_skb for skb pointers
Use kfree_skb for skb pointers
Acked-by: Dimitris Michailidis <dm@chelsio.com> Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
isdn/gigaset: remove EXPERIMENTAL tag from GIGASET_CAPI
The CAPI variant of the Gigaset drivers can, in combination with
capidrv, now fully replace the legacy ISDN4Linux variant. All
reported problems have been fixed. So remove the EXPERIMENTAL tag
from the Kconfig option selecting it, and adapt the documentation
accordingly to encourage users to switch to it.
Impact: documentation/status update, no functional change Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
Take care to free all previously allocated ressources in the
"out of memory" error path of the ISDN_CMD_DIAL branch.
Based on an original patch by Dan Carpenter.
Impact: bugfix Reported-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Tilman Schmidt <tilman@imap.cc> Acked-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
isdn/gigaset: drop debug check on isochronous write
With CONFIG_GIGASET_DEBUG set, every isochronous USB frame after
an erroneous one was checked for more errors. This produced only
noise messages in practice, so drop it.
Impact: cleanup Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
Downgrade the Gigaset driver's reaction to unknown AT responses from
the device from warning to debug level, and remove the handling of
some device responses which aren't relevant for the driver's
operation.
Impact: cleanup Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
Change the Gigaset driver's internal write_cmd interface to accept a
cmdbuf structure instead of a string. This avoids copying formatted
AT commands a second time.
Impact: optimization Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
The usb_gigaset driver's write buffer limit was different from those
of the others for no good reason. Set it to the same value, derived
from the Siemens documentation.
Impact: cosmetic Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
Eran Liberty [Wed, 7 Jul 2010 22:54:54 +0000 (15:54 -0700)]
gianfar: code cleanup
This patch relates to "[PATCH] gainfar.c : skb_over_panic
(kernel-2.6.32.15)"
While in 2.6.32.15 it actually fixed a bug here it merely cleans up
the previous attempts to fix the bug with a more coherent code.
Currently before queuing skb into the rx_recycle it is
"un-skb_reserve"-ed so when taken out in gfar_new_skb() it wont be
reserved twice.
This patch makes sure the alignment skb_reserve is done once, upon
allocating the skb and not when taken out of the rx_recycle
pool. Eliminating the need to undo anything before queue skb back to
the pool.
NOTE: This patch will compile and is fairly straight forward but I do
not have environment to test it as I did with the 2.6.32.15 fix.
Signed-off-by: Eran Liberty <liberty@extricom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Set Toeplitz hash both for LRO and none-LRO skbs.
The first CQE (TPA_START) will contain a hash for an LRO packet.
Current code sets skb->rx_hash for none-LRO skbs only.
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Wed, 7 Jul 2010 21:58:56 +0000 (14:58 -0700)]
net: fix 64 bit counters on 32 bit arches
There is a small possibility that a reader gets incorrect values on 32
bit arches. SNMP applications could catch incorrect counters when a
32bit high part is changed by another stats consumer/provider.
One way to solve this is to add a rtnl_link_stats64 param to all
ndo_get_stats64() methods, and also add such a parameter to
dev_get_stats().
Rule is that we are not allowed to use dev->stats64 as a temporary
storage for 64bit stats, but a caller provided area (usually on stack)
Old drivers (only providing get_stats() method) need no changes.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
CC: Sreenivasa Honnur <Sreenivasa.Honnur@neterion.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Herbert Xu [Mon, 5 Jul 2010 21:29:28 +0000 (21:29 +0000)]
bridge: Clear IPCB before possible entry into IP stack
The bridge protocol lives dangerously by having incestuous relations
with the IP stack. In this instance an abomination has been created
where a bogus IPCB area from a bridged packet leads to a crash in
the IP stack because it's interpreted as IP options.
This patch papers over the problem by clearing the IPCB area in that
particular spot. To fix this properly we'd also need to parse any
IP options if present but I'm way too lazy for that.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Cheers, Signed-off-by: David S. Miller <davem@davemloft.net>
Herbert Xu [Mon, 5 Jul 2010 14:50:08 +0000 (14:50 +0000)]
bridge br_multicast: BUG: unable to handle kernel NULL pointer dereference
On Tue, Jul 06, 2010 at 08:48:35AM +0800, Herbert Xu wrote:
>
> bridge: Restore NULL check in br_mdb_ip_get
Resend with proper attribution.
bridge: Restore NULL check in br_mdb_ip_get
Somewhere along the line the NULL check in br_mdb_ip_get went
AWOL, causing crashes when we receive an IGMP packet with no
multicast table allocated.
This patch restores it and ensures all br_mdb_*_get functions
use it.
Reported-by: Frank Arnold <frank.arnold@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Thanks, Signed-off-by: David S. Miller <davem@davemloft.net>
Ben Hutchings [Fri, 2 Jul 2010 07:08:44 +0000 (07:08 +0000)]
net: Fix definition of netif_vdbg() when VERBOSE_DEBUG is defined
netif_vdbg() was originally defined as entirely equivalent to
netdev_vdbg(), but I assume that it was intended to take the same
parameters as netif_dbg() etc. (Currently it is only used by the
sfc driver, in which I worked on that assumption.)
In commit a4ed89c I changed the definition used when VERBOSE_DEBUG is
not defined, but I failed to notice that the definition used when
VERBOSE_DEBUG is defined was also not as I expected. Change that to
match netif_dbg() as well.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
isdn: avoid calling tty_ldisc_flush() in atomic context
Remove the call to tty_ldisc_flush() from the RESULT_NO_CARRIER
branch of isdn_tty_modem_result(), as already proposed in commit 00409bb045887ec5e7b9e351bc080c38ab6bfd33.
This avoids a "sleeping function called from invalid context" BUG
when the hardware driver calls the statcallb() callback with
command==ISDN_STAT_DHUP in atomic context, which in turn calls
isdn_tty_modem_result(RESULT_NO_CARRIER, ~), and from there,
tty_ldisc_flush() which may sleep.
Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
projects / linux-beck.git / log