ixpad can never be NULL here; if it is NULL we would not have been bound to
the interface and then why would we be called?
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Properly free the resources in error path by the reverse order of resource
allocation.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
In xpad_led_disconnect(), what we really want is to kfree(xpad_led).
In xpad_disconnect(), add a missing kfree(xpad->bdata) to fix the memory leak.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
In current implementation, xpad_probe return 0 when
usb_alloc_urb failed for xpad->bulk_out and kzalloc failed for xpad->bdata.
This patch removes the initialization for error variable,
assign the error code at the place the error happens instead.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
When we test rt->fl.iif against zero, we're seeing if it's
an output or an input route.
Make that explicit with some helper functions.
Signed-off-by: David S. Miller <davem@davemloft.net>
We start at offset 2 for the leftmost frag, and 0 for subsequent frags.
When we reach the end (rightmost), we go back to 2. This fixes readdir on
fragmented (large) directories.
Signed-off-by: Sage Weil <sage@newdream.net>
This patch adds the CE4100 reboot fixup to reboot_fixups_32.c
[ tglx: Moved PCI id to reboot_fixups_32.c ]
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
LKML-Reference: <5bdcfb4f0206fa721570504e95659a03b815bc5e.1289331834.git.dirk.brandewie@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This patch provides access methods for PCI registers that mis-behave on
the CE4100. Each register can be assigned a private init, read and
write routine. The exception to this is the bridge device. The
bridge device is the only device on bus zero (0) that requires any
fixup so it is a special case.
[ tglx: minor coding style cleanups, __init annotation and
simplification of ce4100_conf_read/write ]
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
LKML-Reference: <40b6751381c2275dc359db5a17989cce22ad8db7.1289331834.git.dirk.brandewie@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
MMC hosts that poll for card detection by defining the MMC_CAP_NEEDS_POLL
flag have a race on rmmod, where the delayed work is cancelled without
waiting for completed polling. To prevent this a _sync version of the work
cancellation has to be used.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: <stable@kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Set VM_PFNMAP in the privcmd mmap file_op, rather than later in
xen_remap_domain_mfn_range when it is too late because
vma_wants_writenotify has already been called and vm_page_prot has
already been modified.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Setting Rx FIFO size to 1 reduces reader process wakeup latency up to
20x for baud rates <= 9600. This patch sets the Rx FIFO size to 1 for
baud rates <= 9600 or if low latency has been requested for the tty.
Signed-off-by: Michael Trimarchi <michael@gandalf.sssup.it>
Signed-off-by: Bruno Morelli <bruno@evidence.eu.com>
Signed-off-by: Baurzhan Ismagulov <ibr@radix50.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Documentation about RS485 serial communications
Signed-off-by: Claudio Scordino <claudio@evidence.eu.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Russell King <linux@arm.linux.org.uk>
Acked-by: Grant Edwards <grant.b.edwards@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
[Original From Ken Mills but I redid it using pr_ helpers instead]
Also fix up coding style, there are two warnings left but that is where
the CodingStyle tools blow up because they cannot handle
if (blah) {
foo
} else switch (x) {
case 1:
}
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The mux supports several encoding schemes. Encoding 0 is a "not
recommended" mode still sometimes used. This has now been tested with
hardware that supports this mode, and found wanting.
Fix the FCS handling in this mode and correct the state machine.
Signed-off-by: Ken Mills <ken.k.mills@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This adds a driver for the serial ports found in VIA and WonderMedia
Systems-on-Chip. Interrupt-driven FIFO operation is implemented.
The hardware also supports pure register-based operation (which is
slower) and DMA-based FIFO operation. As the FIFOs are only 16 bytes
long, DMA operation is probably not worth the hassle.
Signed-off-by: Alexey Charkov <alchark@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Prototype driver for the IFX6x60 series of SPI attached modems by Jim
Stanley and Russ Gorby
Signed-off-by: Russ Gorby <richardx.r.gorby@intel.com>
[Some reworking and a major cleanup]
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
If the mux is configured with a large mru/mtu the existing code gets the
byte ordering wrong for the header.
Signed-off-by: Ken Mills <ken.k.mills@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The n2 field is settable but didn't get propogated
Signed-off-by: Ken Mills <ken.k.mills@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The port lock exists to protect these resources, so we need to grab it
before making changes.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
If we are using early serial, don't let the normal console rewind
the log buffer, since that causes things to be printed multiple times.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
We don't need to force a SSYNC here as the LSR register will already
be updated by the time we get back to reading it. This speeds up TX
throughput and lowers general system overhead (since SSYNC is system
wide, not peripheral-specific).
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
On Blackfin systems, peripherals that have optional DMA support always
route their interrupts through the corresponding DMA channel -- even
when DMA is not being used. So in PIO mode, we still need to request
the DMA channel (so interrupts are delivered) which means we need to
always include the DMA header for the DMA defines/functions.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
In the normal regime where an application uses non-blocking I/O
writes on a socket, they will handle -EAGAIN and use poll() to
wait for send space.
They don't actually sleep on the socket I/O write.
But kernel level RPC layers that do socket I/O operations directly
and key off of -EAGAIN on the write() to "try again later" don't
use poll(), they instead have their own sleeping mechanism and
rely upon ->sk_write_space() to trigger the wakeup.
So they do effectively sleep on the write(), but this mechanism
alone does not let the socket layers know what's going on.
Therefore they must emulate what would have happened, otherwise
TCP cannot possibly see that the connection is application window
size limited.
Handle this, therefore, like SUNRPC by setting SOCK_NOSPACE and
bumping the ->sk_write_count as needed when we hit the send buffer
limits.
This should make TCP send buffer size auto-tuning and the
->sk_write_space() callback invocations actually happen.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: David Teigland <teigland@redhat.com>
Kay Sievers pointed out that usage of POLLIN is well defined by POSIX,
and the current usage here doesn't follow that definition. So let's
duplicate the same semantics as implemented by sysfs_poll() instead.
Signed-off-by: Nicolas Pitre <nicolas.pitre@canonical.com>
Acked-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/char/amiserial.c: In function ?rs_ioctl?:
drivers/char/amiserial.c:1302: warning: unused variable ?icount?
commit 0587102cf9 ("tty: icount changeover for
other main devices") removed the users, but not the actual variable.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
USB2.0 spec 9.6.6 says: For all endpoints, bit 10..0 specify the maximum
packet size(in bytes).
So the wMaxPacketSize mask should be 0x7ff rather than 0x3ff.
This patch should be queued for the stable tree. The bug in
xhci_endpoint_init() was present as far back as 2.6.31, and the bug in
xhci_get_max_esit_payload() was present when the function was introduced
in 2.6.34.
Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@kernel.org
Jiri Slaby reports spinlock is held while calling kmalloc(GFP_KERNEL)
and request_irq() in xhci_resume().
Release the spinlock when setup interrupt.
Reported-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
If the xHCI host controller shares an interrupt line with another device,
the xHCI driver needs to check if the interrupt was generated by its
hardware. Unfortunately, the user will see a ton of "Spurious interrupt."
lines if the other hardware interrupts often. Lawrence found his dmesg
output cluttered with this output when the xHCI host shared an interrupt
with his i915 hardware.
Remove the warning, as sharing an interrupt is a normal thing.
This should be applied to the 2.6.36 stable tree.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: Lawrence Rust <lvr@softsystem.co.uk>
Cc: stable@kernel.org
It seems idev field in struct rtable has no special purpose, but adding
extra atomic ops.
We hold refcounts on the device itself (using percpu data, so pretty
cheap in current kernel).
infiniband case is solved using dst.dev instead of idev->dev
Removal of this field means routing without route cache is now using
shared data, percpu data, and only potential contention is a pair of
atomic ops on struct neighbour per forwarded packet.
About 5% speedup on routing test.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
It is important to move nud_state outside of the often modified cache
line (because of refcnt), to reduce false sharing in neigh_event_send()
This is a followup of commit 0ed8ddf404 (neigh: Protect neigh->ha[]
with a seqlock)
This gives a 7% speedup on routing test with IP route cache disabled.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We only ever used the PRB0, neglecting the secondary ring buffers, and
now with the advent of multiple engines with separate ring buffers we
need to excise the anachronisms from our code (and be explicit about
which ring we mean where). This is doubly important in light of the
FORCEWAKE required to read ring buffer registers on SandyBridge.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Before reading ring register, set FORCE_WAKE bit to prevent GT core
power down to low power state, otherwise we may read stale values.
Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
[ickle: added a udelay which seemed to do the trick on my SNB]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
In current implementation, the sysfs entries is not removed before return -ENODEV.
Creating the sysfs attribute should be the last thing done by the function,
after all the rest has been successful.
Otherwise there is a small window during which user-space can access the attribute
but the driver isn't ready to deal with the requests.
Fix it by moving sysfs_create_group to be the last thing done by the function.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Simon Guinot <sguinot@lacie.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
This reverts commit ef821ae70f.
The correct thing to do is to drop the spinlock, not change
the GFP flag here.
Thanks to Sarah for pointing out I shouldn't have taken this patch in
the first place.
Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: David Sterba <dsterba@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
When we enable a PCI device, we avoid doing a lot of the initial setup
work if the device's enable count is non-zero. If we don't fetch the
power state though, we may later fail to set up MSI due to the unknown
status. So pick it up before we short circuit the rest due to a
pre-existing enable or mismatched enable/disable pair (as happens with
VGA devices, which are special in a special way).
Tested-by: Jesse Brandeburg <jesse.brandeburg@gmail.com>
Reported-by: Dave Airlie <airlied@linux.ie>
Tested-by: Dave Airlie <airlied@linux.ie>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
The checks for valid mmaps of PCI resources made through /proc/bus/pci files
that were introduced in 9eff02e204 have several
problems:
1. mmap() calls on /proc/bus/pci files are made with real file offsets > 0,
whereas under /sys/bus/pci/devices, the start of the resource corresponds
to offset 0. This may lead to false negatives in pci_mmap_fits(), which
implicitly assumes the /sys/bus/pci/devices layout.
2. The loop in proc_bus_pci_mmap doesn't skip empty resouces. This leads
to false positives, because pci_mmap_fits() doesn't treat empty resources
correctly (the calculated size is 1 << (8*sizeof(resource_size_t)-PAGE_SHIFT)
in this case!).
3. If a user maps resources with BAR > 0, pci_mmap_fits will emit bogus
WARNINGS for the first resources that don't fit until the correct one is found.
On many controllers the first 2-4 BARs are used, and the others are empty.
In this case, an mmap attempt will first fail on the non-empty BARs
(including the "right" BAR because of 1.) and emit bogus WARNINGS because
of 3., and finally succeed on the first empty BAR because of 2.
This is certainly not the intended behaviour.
This patch addresses all 3 issues.
Updated with an enum type for the additional parameter for pci_mmap_fits().
Cc: stable@kernel.org
Signed-off-by: Martin Wilck <martin.wilck@ts.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Some BIOSes provide PCI host bridge windows that overlap, e.g.,
pci_root PNP0A03:00: host bridge window [mem 0xb0000000-0xffffffff]
pci_root PNP0A03:00: host bridge window [mem 0xafffffff-0xdfffffff]
pci_root PNP0A03:00: host bridge window [mem 0xf0000000-0xffffffff]
If we simply insert these as children of iomem_resource, the second window
fails because it conflicts with the first, and the third is inserted as a
child of the first, i.e.,
b0000000-ffffffff PCI Bus 0000:00
f0000000-ffffffff PCI Bus 0000:00
When we claim PCI device resources, this can cause collisions like this
if we put them in the first window:
pci 0000:00:01.0: address space collision: [mem 0xff300000-0xff4fffff] conflicts with PCI Bus 0000:00 [mem 0xf0000000-0xffffffff]
Host bridge windows are top-level resources by definition, so it doesn't
make sense to make the third window a child of the first. This patch
coalesces any host bridge windows that overlap. For the example above,
the result is this single window:
pci_root PNP0A03:00: host bridge window [mem 0xafffffff-0xffffffff]
This fixes a 2.6.34 regression.
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=17011
Reported-and-tested-by: Anisse Astier <anisse@astier.eu>
Reported-and-tested-by: Pramod Dematagoda <pmd.lotr.gandalf@gmail.com>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
While testing various randconfigs with ktest.pl, I hit the following panic:
BUG: unable to handle kernel paging request at f7e54b03
IP: [<c0d63409>] ibmphp_access_ebda+0x101/0x19bb
Adding printks, I found that the loop that reads the ebda blocks
can move out of the mapped section.
ibmphp_access_ebda: start=f7e44c00 size=5120 end=f7e46000
ibmphp_access_ebda: io_mem=f7e44d80 offset=384
ibmphp_access_ebda: io_mem=f7e54b03 offset=65283
The start of the iomap was at f7e44c00 and had a size of 5120,
making the end f7e46000. We start with an offset of 0x180 or
384, giving the first read at 0xf7e44d80. Reading that location
yields 65283, which is much bigger than the 5120 that was allocated
and makes the next read at f7e54b03 which is outside the mapped area.
Perhaps this is a bug in the driver, or buggy hardware, but this patch
is more about not crashing my box on start up and just giving a warning
if it detects this error.
This patch at least lets my box boot with just a warning.
Cc: Chandru Siddalingappa <chandru@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Return proper error if i2c_check_functionality reports
the adapter does not support the capability we need.
Also remove unneeded initialization for err variable.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Sean MacLennan <smaclennan@pikatech.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Update vxge driver version
Signed-off-by: Jon Mason <jon.mason@exar.com>
Signed-off-by: Ram Vepa <ram.vepa@exar.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Correct issues found by running sparse on the vxge driver, as well as
other miscellaneous cleanups.
Signed-off-by: Jon Mason <jon.mason@exar.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
