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Tasklets are run from an interruptible context. The slave DMA functions
can be called from within IRQ handlers. Taking the spinlock without
disabling interrupts allows an interrupt handler to run, which may try
to take the spinlock again, resulting in deadlock. Fix this by using
the irqsave spinlocks.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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The last_issued variable uses an atomic type, which is only
incremented inside a protected region, and then read. Everywhere else
only reads the value, so it isn't using atomic_t correctly, and it
doesn't even need to. Moreover, the DMA engine code provides us with
a variable for this already - chan.cookie. Use chan.cookie instead.
Also, avoid negative dma_cookie_t values - negative returns from
tx_submit() mean failure, yet in reality we always succeed. Restart
from cookie 1, just like other DMA engine drivers do.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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If maxburst was passed in as zero, we would overflow the burst_sizes[]
array. Fix this by checking for this condition, and defaulting to
single transfer 'bursts'.
Improve the readability of the loop using a for() loop rather than
a while() loop with the iterator initialized far from the loop.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Correct mis-spellings in comments and printk strings.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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The maximum transfer size of the stedma40 is (64k-1) x data-width.
If the transfer size of one element exceeds this limit
the job is split up and sent as linked transfer.
Signed-off-by: Per Forlin <per.forlin@linaro.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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when callback is generated in NFSv4 server, it doesn't set the source
address. When an alias IP is utilized on NFSv4 server and suppose the
client is accessing via that alias IP (e.g. eth0:0), the client invokes
the callback to the IP address that is set on the original device (e.g.
eth0). This behavior results in timeout of xprt.
The patch sets the IP address that the client should invoke callback to.
Signed-off-by: Takuma Umeya <tumeya@redhat.com>
[bfields@redhat.com: Simplify gen_callback arguments, use helper function]
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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SDEV_MEDIA_CHANGE event was first added by commit a341cd0f (SCSI: add
asynchronous event notification API) for SATA AN support and then
extended to cover generic media change events by commit 285e9670
([SCSI] sr,sd: send media state change modification events).
This event was mapped to block device in userland with all properties
stripped to simulate CHANGE event on the block device, which, in turn,
was used to trigger further userspace action on media change.
The recent addition of disk event framework kept this event for
backward compatibility but it turns out to be unnecessary and causes
erratic and inefficient behavior. The new disk event generates proper
events on the block devices and the compat events are mapped to block
device with all properties stripped, so the block device ends up
generating multiple duplicate events for single actual event.
This patch removes the compat event generation from both sr and sd as
suggested by Kay Sievers. Both existing and newer versions of udev
and the associated tools will behave better with the removal of these
events as they from the beginning were expecting events on the block
devices.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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This avoids the need for the confusing ESRCH mapping.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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These are internal nfsd interfaces.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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According to rfc 3530 BADNAME is for strings that represent paths;
BADOWNER is for user/group names that don't map.
And the too-long name should probably be BADOWNER as well; it's
effectively the same as if we couldn't map it.
Cc: stable@kernel.org
Reported-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Reported-by: Simon Kirby <sim@hostway.ca>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Now that soft reset works, we can add this.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
ipv4/route.c: respect prefsrc for local routes
bridge: stp: ensure mac header is set
bridge: fix br_multicast_ipv6_rcv for paged skbs
atl1: fix oops when changing tx/rx ring params
drivers/atm/atmtcp.c: add missing atm_dev_put
starfire: Fix dma_addr_t size test for MIPS
tg3: fix return value check in tg3_read_vpd()
Broadcom CNIC core network driver: fix mem leak on allocation failures in cnic_alloc_uio_rings()
ISDN, Gigaset: Fix memory leak in do_disconnect_req()
CAN: Use inode instead of kernel address for /proc file
skfp: testing the wrong variable in skfp_driver_init()
ppp: allow disabling multilink protocol ID compression
ehea: Avoid changing vlan flags
ueagle-atm: fix PHY signal initialization race
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Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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The nfs server only supports read delegations for now, so we don't care
how conflicts are determined. All we care is that unlocks are
recognized as matching the leases they are meant to remove. After the
last patch, a comparison of struct files will work for that purpose. So
we no longer need this callback.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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When we converted to sharing struct filess between nfs4 opens I went too
far and also used the same mechanism for delegations. But keeping
a reference to the struct file ensures it will outlast the lease, and
allows us to remove the lease with the same file as we added it.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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nfsd controls the lifetime of the lease, not the lock code, so there's
no need for this callback on lease destruction.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Supposes cache_check runs simultaneously with an update on a different
CPU:
cache_check task doing update
^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^
1. test for CACHE_VALID 1'. set entry->data
& !CACHE_NEGATIVE
2. use entry->data 2'. set CACHE_VALID
If the two memory writes performed in step 1' and 2' appear misordered
with respect to the reads in step 1 and 2, then the caller could get
stale data at step 2 even though it saw CACHE_VALID set on the cache
entry.
Add memory barriers to prevent this.
Reviewed-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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We attempt to turn a cache entry negative in place. But that entry may
already have been filled in by some other task since we last checked
whether it was valid, so we could be modifying an already-valid entry.
If nothing else there's a likely leak in such a case when the entry is
eventually put() and contents are not freed because it has
CACHE_NEGATIVE set.
So, take the cache_lock just as sunrpc_cache_update() does.
Reviewed-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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We no longer need a few of these special cases.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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We no longer need this.
Also, EWOULDBLOCK is generally a synonym for EAGAIN, but that may not be
true on all architectures, so map it as well.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Currently we use -EAGAIN returns to determine when to drop a deferred
request. On its own, that is error-prone, as it makes us treat -EAGAIN
returns from other functions specially to prevent inadvertent dropping.
So, use a flag on the request instead.
Returning an error on request deferral is still required, to prevent
further processing, but we no longer need worry that an error return on
its own could result in a drop.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Commit d29068c431599fa "sunrpc: Simplify cache_defer_req and related
functions." asserted that cache_check() could determine success or
failure of cache_defer_req() by checking the CACHE_PENDING bit.
This isn't quite right.
We need to know whether cache_defer_req() created a deferred request,
in which case sending an rpc reply has become the responsibility of the
deferred request, and it is important that we not send our own reply,
resulting in two different replies to the same request.
And the CACHE_PENDING bit doesn't tell us that; we could have
succesfully created a deferred request at the same time as another
thread cleared the CACHE_PENDING bit.
So, partially revert that commit, to ensure that cache_check() returns
-EAGAIN if and only if a deferred request has been created.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Acked-by: NeilBrown <neilb@suse.de>
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We never want to drop a request if we could return a JUKEBOX/DELAY error
instead; so, convert to nfserr_jukebox and let nfsd_dispatch() convert
that to a dropit error as a last resort if JUKEBOX/DELAY is unavailable
(as in the NFSv2 case).
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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setup_callback_client(), nfsd4_release_cb() and nfsd4_process_cb_update()
do not have users outside the translation unit. Let's declare it as
static.
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Signed-off-by: NeilBrown <neilb@suse.de>
[bfields@redhat.com: moved svcauth_unix_purge outside ifdef's.]
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Once a sunrpc cache entry is VALID, we should be replacing it (and
allowing any concurrent users to destroy it on last put) instead of
trying to update it in place.
Otherwise someone referencing the ip_map we're modifying here could try
to use the m_client just as we're putting the last reference.
The bug should only be seen by users of the legacy nfsd interfaces.
(Thanks to Neil for suggestion to use sunrpc_invalidate.)
Reviewed-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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When we read in block groups, we'll set non-redundant groups
readonly if we find a raid1, DUP or raid10 group. But the
ro code has an off by one bug in the math around testing to
make sure out accounting doesn't go wrong.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
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Fix test in lbs_spi_thread(). down_interruptible() can return -EINTR, but
not EINTR.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Dan Williams <dcbw@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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The key documentation is slightly out of date, fix
that. Also, the list entry in the key struct is no
longer used that way, so list_del_init() isn't
necessary any more there.
Finally, ieee80211_key_link() is no longer invoked
under RCU read lock, but rather with an appropriate
station lock held.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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To inject a packet in monitor mode, a dummy station has
to be associated with the monitor interface in the target.
Failing to do this would result in a firmware crash on the device.
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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ath5k_eeprom_mode_from_channel() returns -1 on error but we're storing
the result in "ee_mode" which is an unsigned char. This breaks the
error handling. This patch makes "ee_mode" an int.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Remove some obvious looking dead code and rename few functions
Signed-off-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This reverts enables the reorder release timer once again.
The issues laid out in:
<http://www.spinics.net/lists/linux-wireless/msg57214.html>
Have been addressed by:
mac80211: serialize rx path workers
mac80211: ignore PSM bit of reordered frames
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This patch addresses the issue of serialization between
the main rx path and various reorder release timers.
<http://www.spinics.net/lists/linux-wireless/msg57214.html>
It converts the previously local "frames" queue into
a global rx queue [rx_skb_queue]. This way, everyone
(be it the main rx-path or some reorder release timeout)
can add frames to it.
Only one active rx handler worker [ieee80211_rx_handlers]
is needed. All other threads which have lost the race of
"runnning_rx_handler" can now simply "return", knowing that
the thread who had the "edge" will also take care of their
workload.
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Restart the beacon timers only if the beacon
was already configured. Otherwise beacons timers
are restarted unnecessarily in unassociated state too.
Cc: stable@kernel.org
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This reverts commit 0ce3bcfc84900a64347b0fe1140229bd81314008.
Event though with the above commit we obtain the configured DTIM period
from the AP rather than always hardcoding it to '1', this seems to cause
problems under the following scenarios:
* Preventing association with broken AP's
* Adds latency in roaming
So its better to always use the safe value of '1' for dtim period
Cc: Jouni Malinen <Jouni.Malinen@Atheros.com>
Signed-off-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Fixes the misplaced article in the following:
"cfg80211: Updating information on frequency 5785 MHz for
20 a MHz width channel with regulatory rule:"
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Fixed a bug where if a mesh interface has a different MAC address from its bridge
interface, then it would not be able to send data traffic to any other mesh node.
This also adds support for communication between mesh nodes and external bridged
nodes by using a 6 address format if the source is a node within the mesh and the
destination is an external node proxied by a mesh portal.
Signed-off-by: Joel A Fernandes <agnel.joel@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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An Rx DMA descriptor can have multiple error bits set, and some error
bits (e.g. MIC failure) are filtered by the driver based on other criteria.
Remove the 'else' in various error bit checks so that all error information
is properly passed to the driver.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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And add the copyright/license header.
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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When returning to the operating channel, a full HW
reset has to be done instead of a fast channel change.
Since sw_scan_complete() is called after the config() call for the
home channel, we end up doing a FCC. Fix this issue by checking
the OFFCHANNEL flag to determine FCC.
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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The device has to be reset when a FATAL event is received.
Not doing so would leave the card in a non-working state.
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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There is no need to lock the various work cancellation
calls. This will be helpful when handling FATAL events.
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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When doing a channel change, the pending URBs have to be killed
properly on calling htc_stop().
This fixes the probe response timeout seen when sending UDP traffic at
a high rate and running background scan at the same time.
Cc: stable <stable@kernel.org>
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Some minor clean ups in assigning values to beacon config parameters
Signed-off-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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