Alan Stern [Wed, 3 Sep 2008 20:38:32 +0000 (16:38 -0400)]
OHCI: Allow broken controllers to auto-stop
This patch (as1134) attempts to improve the way we handle OHCI
controllers with broken Root Hub Status Change interrupt support. In
these controllers the RHSC interrupt bit essentially never turns off,
making RHSC interrupts useless -- they have to remain permanently
disabled.
Such controllers should still be allowed to turn off their root hubs
when no devices are attached. Polling for new connections can
continue while the root hub is suspended. The patch implements this
feature. (It won't have much effect unless CONFIG_PM is enabled and
CONFIG_USB_SUSPEND is disabled, but since the overhead is very small
we may as well do it.)
Alan Stern [Tue, 2 Sep 2008 14:12:11 +0000 (10:12 -0400)]
usb-storage: report underflow with no sense data
This patch (as1118) addresses a problem with certain USB mass-storage
devices. These devices sometimes return less data than asked for and
then provide no sense data to explain the problem. Currently
usb-storage leaves it up to the SCSI layer to decide how this should
be handled, and the SCSI layer interprets the lack of sense data to
mean that nothing went wrong. But if we got less data than required
then something definitely _did_ go wrong, and we should say so.
The patch tells the SCSI layer to retry the command when this sort of
thing happens. Retrying may not solve the underlying problem, but
it's better than believing that data was transferred when it wasn't.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Li Yang [Tue, 2 Sep 2008 11:58:10 +0000 (19:58 +0800)]
usb: add Freescale QE/CPM USB peripheral controller driver
Some of Freescale SoC chips have a QE or CPM co-processor which
supports full speed USB. The driver adds device mode support
of both QE and CPM USB controller to Linux USB gadget. The
driver is tested with MPC8360 and MPC8272, and should work with
other models having QE/CPM given minor tweaks.
Signed-off-by: Xie Xiaobo <X.Xie@freescale.com> Signed-off-by: Li Yang <leoli@freescale.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
USB: drivers/usb/misc: Use an IS_ERR test rather than a NULL test
In case of error, the function backlight_device_register returns an
ERR pointer, but never returns a NULL pointer. So a NULL test that may
come after a call to this function should be strengthened by an IS_ERR
test.
The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@match_bad_null_test@
expression x, E;
statement S1,S2;
@@
x = backlight_device_register(...)
... when != x = E
* if (x != NULL)
S1 else S2
// </smpl>
David Brownell [Tue, 19 Aug 2008 00:45:25 +0000 (17:45 -0700)]
usb gadget: defer obex enumeration
Some USB peripheral controller drivers support software control
over the data pullup. Use those controls to prevent the OBEX
function from enumerating until the userspace server has opened
the /dev/ttyGS* node it will use to implement protocol chitchat
with the USB host.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
David Brownell [Tue, 19 Aug 2008 00:38:22 +0000 (17:38 -0700)]
usb gadget: function activation/deactivation
Add a new mechanism to the composite gadget framework, letting
functions deactivate (and reactivate) themselves. Think of it
as a refcounted wrapper for the software pullup control.
A key example of why to use this mechanism involves functions that
require a userspace daemon. Those functions shuld use this new
mechanism to prevent the gadget from enumerating until those daemons
are activated. Without this mechanism, hosts would see devices that
malfunction until the relevant daemons start.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
David Brownell [Fri, 15 Aug 2008 00:04:48 +0000 (17:04 -0700)]
usb: gadget Kconfig cleanup
This reorders the list of USB peripheral controller drivers so it's
more common for the initial (default) value to be relevant: put the
SOC integrated silicon up front, discrete stuff last. Alphabetize.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Marc Zyngier [Mon, 18 Aug 2008 11:08:42 +0000 (13:08 +0200)]
USB: Let some USB host controllers get IRQ flags from resource
[This version fixes a thinko in the r8a66597 driver]
This patch let a few discrete USB host controllers drivers (isp116x-hcd,
r8a66597-hcd and sl811-hcd) obtain IRQ flags from their IORESOURCE_IRQ
resource if configured as such, much like it's been done for the smc91x
driver.
It spares people writing support for specific boards the burden to
configure the interrupt controller independantly, and keeps all IRQ
related information in a single resource.
HCD that are integrally part of a SoC have been left aside, as there
is probably no "wiring" options...
Tested on an Xscale PXA-255 based platform with isp116x-hcd.
Signed-off-by: Marc Zyngier <marc.zyngier@altran.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Oliver Neukum [Tue, 29 Jul 2008 13:26:15 +0000 (15:26 +0200)]
USB: kill URBs permanently
looking at usb_kill_urb() it seems to me that it is unnecessarily lenient.
In the use case of disconnect() you never want to use the URB again
(for the same device) But leaving urb->reject elevated will make it easier
to avoid races between read/write and disconnect.
Signed-off-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This driver was originaly written by Stefan Kopp, but massively
reworked by Greg for submission.
Thanks to Felipe Balbi <me@felipebalbi.com> for lots of work in cleaning
up this driver.
Thanks to Oliver Neukum <oliver@neukum.org> for reviewing previous
versions and pointing out problems.
Cc: Stefan Kopp <stefan_kopp@agilent.com> Cc: Marcel Janssen <korgull@home.nl> Cc: Felipe Balbi <me@felipebalbi.com> Cc: Oliver Neukum <oliver@neukum.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Oceanic dive computers (such as the VT3 --
http://www.oceanicworldwide.com/p_computers_vt3.html) all use an onboard
FTDI serial converter, with the FTDI vid and a PID of 0xf460. The
attached patch adds that pid to ftdi_sio; driver connects to my VT3
after that.
Signed-off-by: Vladimir Vukicevic <vladimir@pobox.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Matthias Hopf [Fri, 17 Oct 2008 21:18:05 +0000 (07:18 +1000)]
drm/i915: fix ioremap of a user address for non-root (CVE-2008-3831)
Olaf Kirch noticed that the i915_set_status_page() function of the i915
kernel driver calls ioremap with an address offset that is supplied by
userspace via ioctl. The function zeroes the mapped memory via memset
and tells the hardware about the address. Turns out that access to that
ioctl is not restricted to root so users could probably exploit that to
do nasty things. We haven't tried to write actual exploit code though.
Keith Packard [Wed, 15 Oct 2008 04:41:13 +0000 (21:41 -0700)]
i915: Don't run retire work handler while suspended
At leavevt and lastclose time, cancel any pending retire work handler
invocation, and keep the retire work handler from requeuing itself if it is
currently running.
This patch restructures i915_gem_idle to perform all of these tasks instead
of having both leavevt and lastclose call a sequence of functions.
Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
Keith Packard [Wed, 15 Oct 2008 02:55:10 +0000 (19:55 -0700)]
i915: Map status page cached for chips with GTT-based HWS location.
This should improve performance by avoiding uncached reads by the CPU (the
point of having a status page), and may improve stability. This patch only
affects G33, GM45 and G45 chips as those are the only ones using GTT-based
HWS mappings.
Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
Keith Packard [Wed, 15 Oct 2008 00:20:35 +0000 (17:20 -0700)]
i915: Fix up ring initialization to cover G45 oddities
G45 appears quite sensitive to ring initialization register writes,
sometimes leaving the HEAD register with the START register contents. Check
to make sure HEAD is reset correctly when START is written, and fix it up,
screaming loudly.
Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
Like the last patch but adds a macro to get at the irq value instead of
dereferencing pdev directly. Should make things easier for the BSD guys and
if we ever support non-PCI devices.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
Eric Anholt [Tue, 23 Sep 2008 21:50:57 +0000 (14:50 -0700)]
drm: Use ioremap_wc in i915_driver instead of ioremap, since we always want WC.
Fixes failure to map the ringbuffer when PAT tells us we don't get to do
uncached on something that's already mapped WC, or something along those lines.
Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
Eric Anholt [Mon, 1 Sep 2008 23:45:29 +0000 (16:45 -0700)]
i915: Use struct_mutex to protect ring in GEM mode.
In the conversion for GEM, we had stopped using the hardware lock to protect
ring usage, since it was all internal to the DRM now. However, some paths
weren't converted to using struct_mutex to prevent multiple threads from
concurrently working on the ring, in particular between the vblank swap handler
and ioctls.
Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
Eric Anholt [Wed, 30 Jul 2008 19:06:12 +0000 (12:06 -0700)]
drm: Add GEM ("graphics execution manager") to i915 driver.
GEM allows the creation of persistent buffer objects accessible by the
graphics device through new ioctls for managing execution of commands on the
device. The userland API is almost entirely driver-specific to ensure that
any driver building on this model can easily map the interface to individual
driver requirements.
GEM is used by the 2d driver for managing its internal state allocations and
will be used for pixmap storage to reduce memory consumption and enable
zero-copy GLX_EXT_texture_from_pixmap, and in the 3d driver is used to enable
GL_EXT_framebuffer_object and GL_ARB_pixel_buffer_object.
Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
Eric Anholt [Thu, 21 Aug 2008 19:53:33 +0000 (12:53 -0700)]
Export kmap_atomic_pfn for DRM-GEM.
The driver would like to map IO space directly for copying data in when
appropriate, to avoid CPU cache flushing for streaming writes.
kmap_atomic_pfn lets us avoid IPIs associated with ioremap for this process.
Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
Keith Packard [Fri, 20 Jun 2008 07:08:06 +0000 (00:08 -0700)]
Export shmem_file_setup for DRM-GEM
GEM needs to create shmem files to back buffer objects. Though currently
creation of files for objects could have been driven from userland, the
modesetting work will require allocation of buffer objects before userland
is running, for boot-time message display.
Signed-off-by: Eric Anholt <eric@anholt.net> Cc: Nick Piggin <npiggin@suse.de> Signed-off-by: Dave Airlie <airlied@redhat.com>
drm: Rework vblank-wait handling to allow interrupt reduction.
Previously, drivers supporting vblank interrupt waits would run the interrupt
all the time, or all the time that any 3d client was running, preventing the
CPU from sleeping for long when the system was otherwise idle. Now, interrupts
are disabled any time that no client is waiting on a vblank event. The new
method uses vblank counters on the chipsets when the interrupts are turned
off, rather than counting interrupts, so that we can continue to present
accurate vblank numbers.
Co-author: Michel Dänzer <michel@tungstengraphics.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
David Howells [Tue, 2 Sep 2008 01:03:14 +0000 (11:03 +1000)]
drm/cred: wrap task credential accesses in the drm driver.
Wrap access to task credentials so that they can be separated more easily from
the task_struct during the introduction of COW creds.
Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().
Change some task->e?[ug]id to task_e?[ug]id(). In some places it makes more
sense to use RCU directly rather than a convenient wrapper; these will be
addressed by later patches.
Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: James Morris <jmorris@namei.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: David Airlie <airlied@redhat.com>
Jesse Barnes [Mon, 25 Aug 2008 22:11:06 +0000 (15:11 -0700)]
separate i915 suspend/resume functions into their own file
[Patch against drm-next. Consider this a trial balloon for our new Linux
development model.]
This is a big chunk of code. Separating it out makes it easier to change
without churn on the main i915_drv.c file (and there will be churn as we
fix bugs and add things like kernel mode setting). Also makes it easier
to share this file with BSD.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
Matthew Garrett [Tue, 5 Aug 2008 18:37:25 +0000 (19:37 +0100)]
Add Intel ACPI IGD OpRegion support
This adds the support necessary for allowing ACPI backlight control to
work on some newer Intel-based graphics systems. Tested on Thinkpad T61
and HP 2510p hardware.
Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Dave Airlie <airlied@linux.ie>
Eric Anholt [Tue, 29 Jul 2008 19:10:39 +0000 (12:10 -0700)]
i915: Add support for MSI and interrupt mitigation.
Previous attempts at interrupt mitigation had been foiled by i915_wait_irq's
failure to update the sarea seqno value when the status page indicated that
the seqno had already been passed. MSI support has been seen to cut CPU
costs by up to 40% in some workloads by avoiding other expensive interrupt
handlers for frequent graphics interrupts.
Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com> Cc: Dave Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
David Howells [Wed, 30 Jul 2008 19:29:37 +0000 (12:29 -0700)]
SiS DRM: fix the memory allocator if the SIS FB is built as a module
Fix the SIS DRM memory allocator if the SIS FB built as a module. The SIS DRM
code initialises the mm allocation hooks, but _only_ if the SIS FB is not
built as a module because it depends on CONFIG_FB_SIS, and that's unset if the
SIS FB is not built in. It must check CONFIG_FB_SIS_MODULE as well.
Signed-off-by: David Howells <dhowells@redhat.com> Cc: Dave Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
Carlos R. Mafra [Wed, 30 Jul 2008 19:29:37 +0000 (12:29 -0700)]
drm: remove #define's for non-linux systems
There is no point in considering FreeBSD et al. in the linux kernel
source code.
Signed-off-by: Carlos R. Mafra <crmafra@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
V4L/DVB (9276): videobuf-dvb: two functions are now static
This patch marks those two functions as static:
static int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe,
static int videobuf_dvb_register_frontend(struct dvb_adapter *adapter,
Since MFE patches changed their calls by videobuf_dvb_register_bus.
To avoid having to declare the prototypes, the patch moves
videobuf_dvb_register_bus() to be after the declaration of the above functions
used there.
Cc: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
V4L/DVB (9272): mxl5005s: Bug fix stopped DVB-T from working the second time around.
Jose reported:
I am using a Avermedia Volar X with af9015 driver(DVB-T).
The first time you use the card, first call reconfigure with MXL_QAM,
and when tune DVB-T it calls reconfigure with MXL_DVBT. But if you close
the frontend and open again, it calls reconfigure with MXL_QAM, but not
call reconfigure with MXL_DVBT because state->current_mode don't change
(is MXL_DVBT).
Signed-off-by: Jose Alberto Reguero <jareguero@telefonica.net> Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Christophe divulged the following:
"Since 8PSK (and higher mod) signals are very likely to have pilot symbols,
pilot_auto should start with pilot_on for 8PSK.
And since QPSK signals are unlikely to have pilot, pilot_auto should start
with pilot_off for QPSK.
Without the patch:
QPSK tuning delay: ~100ms
8PSK tuning delay: ~900ms
with patch:
QPSK tuning delay: ~100ms
8PSK tuning delay: ~100ms
"
This patch does as Cristophe asks. In emulated auto-pilot we
choose pilot-on for tuning PSK_8 and pilot-off for
tuning QPSK.
Darron Broad [Wed, 15 Oct 2008 17:18:42 +0000 (14:18 -0300)]
V4L/DVB (9269): cx88: add I2S-ADC tvaudio method
This adds I2S-ADC tvaudio mode as a formal method of audio
delivery.
This fixes one bug and adds fm audio via I2S-ADC on cards
that support it.
The bug occured before when I2S-ADC mode was initiated on
composite/s-video open but was then reset within 500ms
by the audio thread which used any previous audio tuning
details.
This fixes attachment failure where we now unwind
attachment and skip non-attached nodes where
necessary so we can survive a fault situation
correctly.
Darron Broad [Wed, 15 Oct 2008 16:37:59 +0000 (13:37 -0300)]
V4L/DVB (9264): MFE: bugfix: multi-frontend mutual exclusion parallel open
When moving from one frontend to another
an application could spawn multiple threads opening
the same new frontend and in some circumstances all of
these could become delayed waiting for the previous
frontend readers or previous frontend writer thread to
complete.
In this scenario the first thread will succeed on open
to bring the new frontend online but any others will return
EBUSY. This is a fault. If the first succeeds and all others
are on the same frontend then they should succeed also.
Steven Toth [Thu, 16 Oct 2008 23:30:45 +0000 (20:30 -0300)]
V4L/DVB (9262): cx88: Change spurious buffer message into a debug only message
A number of users have complained that their syslog often shows this
messages but it doesn't impact performance. I'm changing this to a debug
message, so developers will still see the message during testing and
users will no longer be bothered by this.
Signed-off-by: Steven Toth <stoth@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>