Linus Torvalds [Thu, 8 Feb 2007 18:03:28 +0000 (10:03 -0800)]
Merge branch 'drm-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm: Allow for 44 bit user-tokens (or drm_file offsets)
drm/via: Disable AGP DMA for chips with the new 3D engine.
drm: update core memory manager from git drm tree
drm: remove drm_ioremap and drm_ioremapfree
i810/i830: use drm_core_ioremap instead of drm_ioremap
drm: use vmalloc_user instead of vmalloc_32 for DRM_SHM
via: allow for npot texture pitch alignment
via: add some new chipsets
via: some PCI posting flushes
Linus Torvalds [Thu, 8 Feb 2007 04:24:25 +0000 (20:24 -0800)]
kbuild: make $(checker-shell ) strip spaces around the result
It looks like GNU make version 3.80 (but apparently not 3.81) adds
leading whitespace to the result of the checker-shell execution. This
strips them off explicitly.
Also, don't bother symlinking the output file to /dev/null. It's likely
as expensive as just writing the temp-file, and we need to remove it
anyway afterwards.
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6: (70 commits)
USB: remove duplicate device id from zc0301
USB: remove duplicate device id from usb_storage
USB: remove duplicate device id from keyspan
USB: remove duplicate device id from ftdi_sio
USB: remove duplicate device id from visor
USB: a bit more coding style cleanup
usbcore: trivial whitespace fixes
usb-storage: use first bulk endpoints, not last
EHCI: fix interrupt-driven remote wakeup
USB: switch ehci-hcd to new polling scheme
USB: autosuspend for usb printer driver
USB Input: Added kernel module to support all GTCO CalComp USB InterWrite School products
USB: Sierra Wireless auto set D0
USB: usb ethernet gadget recognizes HUSB2DEV
USB: list atmel husb2_udc gadget controller
USB: gadgetfs AIO tweaks
USB: gadgetfs behaves better on userspace init bug
USB: gadgetfs race fix
USB: gadgetfs simplifications
USB: gadgetfs cleanups
...
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6: (28 commits)
sysfs: Shadow directory support
Driver Core: Increase the default timeout value of the firmware subsystem
Driver core: allow to delay the uevent at device creation time
Driver core: add device_type to struct device
Driver core: add uevent vars for devices of a class
SYSFS: Fix missing include of list.h in sysfs.h
HOWTO: Add a reference to Harbison and Steele
sysfs: error handling in sysfs, fill_read_buffer()
kobject: kobject_put cleanup
sysfs: kobject_put cleanup
sysfs: suppress lockdep warnings
Driver core: fix race in sysfs between sysfs_remove_file() and read()/write()
driver core: Change function call order in device_bind_driver().
driver core: Don't stop probing on ->probe errors.
driver core fixes: device_register() retval check in platform.c
driver core fixes: make_class_name() retval checks
/sys/modules/*/holders
USB: add the sysfs driver name to all modules
SERIO: add the sysfs driver name to all modules
PCI: add the sysfs driver name to all modules
...
Linus Torvalds [Thu, 8 Feb 2007 03:21:56 +0000 (19:21 -0800)]
Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (116 commits)
sk98lin: planned removal
AT91: MACB support
sky2: version 1.12
sky2: add new chip ids
sky2: Yukon Extreme support
sky2: safer transmit timeout
sky2: TSO support for EC_U
sky2: use dev_err for error reports
sky2: add Wake On Lan support
fix unaligned exception in /drivers/net/wireless/orinoco.c
Remove unused kernel config option DLCI_COUNT
z85230: spinlock logic
mips: declance: Driver model for the PMAD-A
Spidernet: Rework RX linked list
NET: turn local_save_flags() + local_irq_disable() into local_irq_save()
NET-3c59x: turn local_save_flags() + local_irq_disable() into local_irq_save()
hp100: convert pci_module_init() to pci_register_driver()
NetXen: Added ethtool support for user level tools.
NetXen: Firmware crb init changes.
maintainers: add atl1 maintainers
...
Remove the memory manager parameter from the put_block function, as this
makes the client code a lot cleaner. Prepare buffer manager for lock and
unlock calls.
Fix buggy aligned allocations.
Remove the stupid root_node field from the core memory manager.
Support multi-page buffer offset alignments
Add improved alignment functionality to the core memory manager.
This makes an allocated block actually align itself and returns any
wasted space to the manager.
Andrew Victor [Wed, 7 Feb 2007 15:40:44 +0000 (16:40 +0100)]
AT91: MACB support
The Atmel MACB Ethernet peripheral is also integrated in the AT91SAM9260
and AT91SAM9263 processors. The differences from the AVR32 version are:
* Single peripheral clock.
* MII/RMII selection bit is inverted.
* Clock enable bit.
Original patch from Patrice Vilchez.
Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Use the standard dev_xxx functions instead of printk directly for
error reports. Fix a bug where the initialization would return 0
if allocation of network device failed.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
The arch hooks arch_setup_msi_irq and arch_teardown_msi_irq are now
responsible for allocating and freeing the linux irq in addition to
setting up the the linux irq to work with the interrupt.
arch_setup_msi_irq now takes a pci_device and a msi_desc and returns
an irq.
With this change in place this code should be useable by all platforms
except those that won't let the OS touch the hardware like ppc RTAS.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
We need to be able to get from an irq number to a struct msi_desc.
The msi_desc array in msi.c had several short comings the big one was
that it could not be used outside of msi.c. Using irq_data in struct
irq_desc almost worked except on some architectures irq_data needs to
be used for something else.
So this patch adds a msi_desc pointer to irq_desc, adds the appropriate
wrappers and changes all of the msi code to use them.
The dynamic_irq_init/cleanup code was tweaked to ensure the new
field is left in a well defined state.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Since msi_remove_pci_irq_vectors is designed to be called during
hotplug remove it is actively wrong to query the hardware and expect
meaningful results back.
To that end remove the pci_find_capability calls. Testing
dev->msi_enabled and dev->msix_enabled gives us all of the information
we need.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
With the removal of msi_lookup_irq all of the functions using msi_lock
operated on a single device and none of them could reasonably be
called on that device at the same time.
Since what little synchronization that needs to happen needs to happen
outside of the msi functions, msi_lock could never be contended and as
such is useless and just complicates the code.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The function msi_lookup_irq was horrible. As a side effect of running
it changed dev->irq, and then the callers would need to change it
back. In addition it does a global scan through all of the irqs,
which seems to be the sole justification of the msi_lock.
To remove the neede for msi_lookup_irq I added first_msi_irq to struct
pci_dev. Then depending on the context I replaced msi_lookup_irq with
dev->first_msi_irq, dev->msi_enabled, or dev->msix_enabled.
msi_enabled and msix_enabled were already present in pci_dev for other
reasons.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Michael Ellerman [Thu, 25 Jan 2007 08:34:08 +0000 (19:34 +1100)]
MSI: Combine pci_(save|restore)_msi/msix_state
The PCI save/restore code doesn't need to care about MSI vs MSI-X, all
it really wants is to say "save/restore all MSI(-X) info for this device".
This is borne out in the code, we call the MSI and MSI-X save routines
side by side, and similarly with the restore routines.
So combine the MSI/MSI-X routines into pci_save_msi_state() and
pci_restore_msi_state(). It is up to those routines to decide what state
needs to be saved.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Michael Ellerman [Thu, 25 Jan 2007 08:34:07 +0000 (19:34 +1100)]
MSI: Replace pci_msi_quirk with calls to pci_no_msi()
I don't see any reason why we need pci_msi_quirk, quirk code can just
call pci_no_msi() instead.
Remove the check of pci_msi_quirk in msi_init(). This is safe as all
calls to msi_init() are protected by calls to pci_msi_supported(),
which checks pci_msi_enable, which is disabled by pci_no_msi().
The pci_disable_msi routines didn't check pci_msi_quirk, only
pci_msi_enable, but as far as I can see that was a bug not a feature.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Satoru Takeuchi [Thu, 18 Jan 2007 04:50:05 +0000 (13:50 +0900)]
PCI: cleanup MSI code
Cleanup MSI code as follows:
- fix some types
- fix strange local variable definition
- delete unnecessary blank line
- add comment to #endif which is far from corresponding #ifdef
Jean Delvare [Fri, 5 Jan 2007 10:23:15 +0000 (11:23 +0100)]
PCI: Speed up the Intel SMBus unhiding quirk
Speed up the Intel SMBus PCI quirk by avoiding tests which can only
fail. This also makes the compiled code significantly smaller when
using gcc 3.2/3.4. gcc 4.x appears to optimize the code by itself so
this change doesn't make a difference there.
Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Daniel Yeisley [Thu, 21 Dec 2006 19:34:57 +0000 (14:34 -0500)]
PCI Quirk: 1k I/O space IOBL_ADR fix on P64H2
There's an existing quirk for the kernel to use 1k IO space granularity
on the Intel P64H2. It turns out however that pci_setup_bridge() in
drivers/pci/setup-bus.c reads in the IO base and limit address register
masks it off to the nearest 4k, and writes it back. This causes the
kernel to be on 1k boundaries and the hardware to be 4k aligned. The
patch below fixes the problem.
Signed-off-by: Dan Yeisley <dan.yeisley@unisys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE config option is not
needed because polling mechanism for shpc hotplug events can be
enabled through module option 'shpchp_poll_mode'. This patch removes
CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE.
Kenji Kaneshige [Fri, 22 Dec 2006 01:01:10 +0000 (17:01 -0800)]
pciehp: fix wait command completion
This patch fixes this problem that pciehp driver will sleep
unnecessarily long when waiting for command completion. With this
patch, modprobe pciehp driver becomes very faster as follows for
instance.
Adrian Bunk [Sat, 18 Nov 2006 00:06:29 +0000 (01:06 +0100)]
PCI: mark pci_find_device() as __deprecated
On Fri, Nov 17, 2006 at 09:32:36AM -0500, Alan Cox wrote:
>
> Soon we should deprecate pci_find_device as well
So let's mark it as __deprecated now, which also has the side effect
that noone can later whine that removing it might break some shiny
external modules.
Oh, and if anything starts complaining "But this adds some warnings to
my kernel build!", he should either first fix the 200 kB (sic) of
warnings I'm getting in 2.6.19-rc5-mm2 starting at MODPOST or go to hell.
Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Adrian Bunk [Tue, 19 Dec 2006 04:13:15 +0000 (05:13 +0100)]
PCI: quirks.c: cleanup
This patch contains the following cleanups:
- move all EXPORT_SYMBOL's directly below the code they are exporting
- move all DECLARE_PCI_FIXUP_*'s directly below the functions they
are calling
Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Hidetoshi Seto [Mon, 18 Dec 2006 01:31:06 +0000 (10:31 +0900)]
PCI : Add selected_regions funcs
This patch adds the following changes into generic PCI code especially
for PCI legacy I/O port free drivers.
- Added new pci_request_selected_regions() and
pci_release_selected_regions() for PCI legacy I/O port free
drivers in order to request/release only the selected regions.
- Added helper routine pci_select_bars() which makes proper mask
of BARs from the specified resource type. This would be very
helpful for users of pci_enable_device_bars().
Yinghai Lu [Wed, 29 Nov 2006 21:53:10 +0000 (13:53 -0800)]
PCI: check szhi when sz is 0 when 64 bit iomem bigger than 4G
For pci mem resource that size is bigger than 4G, the sz returned by
pc_size will be 0.
So that resource is skipped, and register contained hi address will be
treated as another 32bit resource. We need to use sz64 and pci_sz64 for
64 bit resource for clear logical. Typical usages for this: Opteron
system with co-processor and the co-processor could take more than 4G
RAM as pre-fetchable mem resource.
Signed-off-by: Yinghai Lu <yinghai.lu@amd.com> Cc: Andi Kleen <ak@suse.de> Cc: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
fix unaligned exception in /drivers/net/wireless/orinoco.c
Prevent an unaligned exception to occur. (GCC 4.1) tmp is defined as char
pointer while it is later accessed as short.
Cc: Jean Tourrilhes <jt@hpl.hp.com> Cc: John W. Linville <linville@tuxdriver.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Remove the unused kernel config option DLCI_COUNT.
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Garzik <jeff@garzik.org> Cc: Krzysztof Halasa {khc@pm.waw.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Alan Cox [Tue, 6 Feb 2007 00:31:03 +0000 (16:31 -0800)]
z85230: spinlock logic
At some point someone added a spin_lock(&dev->lock) to the IRQ handler for
the Z85230 driver. This actually correctly fixes a bug but the necessary
changes to remove the chan->lock calls in the event handlers were not made
(c->lock is the same lock).
Simona Dascenzo reported the problem with the driver and this patch should
fix the problem he found.
Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
This is a set of changes that converts the PMAD-A support to the driver model.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Linas Vepstas [Tue, 6 Feb 2007 00:29:43 +0000 (16:29 -0800)]
Spidernet: Rework RX linked list
Make the hardware perceive the RX descriptor ring as a null-terminated linked
list, instead of a circular ring.
Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Oliver Neukum [Thu, 25 Jan 2007 10:17:41 +0000 (11:17 +0100)]
USB: a bit more coding style cleanup
I was sitting in a train threatened to be blocked by ice. I took this
as a hint to do some more boring work for the common good. Here's
a bit more for coding style.
Signed-off-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Alan Stern [Mon, 22 Jan 2007 16:58:34 +0000 (11:58 -0500)]
usb-storage: use first bulk endpoints, not last
According to the Bulk-Only spec, usb-storage is supposed to use the
_first_ bulk-in and bulk-out endpoints it finds, not the _last_. And
while we're at it, we ought to test the direction of the interrupt
endpoint as well. This patch (as842) makes both changes.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: Matthew Dharm <mdharm-usb@one-eyed-alien.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Alan Stern [Mon, 22 Jan 2007 21:08:53 +0000 (16:08 -0500)]
EHCI: fix interrupt-driven remote wakeup
Now that port status change notifications are interrupt-driven,
ehci-hcd needs to tell usbcore when a remote-wakeup resume operation
is finished -- we can no longer rely on the core to poll and find
out. This patch (as843) uses the root-hub status timer to force a
poll after the resume is complete.
The patch also changes the test for detecting when the TDRSMDN resume
period has expired. It's necessary to use time_after_eq() instead of
time_after(), since the polling is triggered precisely by a timer.
The same change is made for TDRSTR reset expiration, for consistency.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Marcelo Tosatti [Sun, 21 Jan 2007 21:45:59 +0000 (19:45 -0200)]
USB: switch ehci-hcd to new polling scheme
Switch ehci-hcd to use the new polling scheme, which reports root
hub status changes via the interrupt handler, in an asynchronous
fashion. Doing so disables polling for status changes (whose handler is
rh_timer_func).
Tested on a Geode GX machine, which is now capable of running at =~ 5
timer interrupts per second (in the -rt tree), resulting in significant
power savings.
Kevin Lloyd [Thu, 18 Jan 2007 00:04:18 +0000 (16:04 -0800)]
USB: Sierra Wireless auto set D0
This patch ensures that the device is turned on when inserted into the system.
It also adds more VID/PIDs and matches the N_OUT_URB with the airprime driver.
Signed-off-by: Kevin Lloyd <linux@sierrawireless.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Alan Stern [Wed, 17 Jan 2007 07:28:48 +0000 (23:28 -0800)]
USB: gadgetfs AIO tweaks
This patch (as837) fixes several mistakes in the AIO interface of the
gadgetfs driver:
The ki_retry method is not supposed to do a put on the kiocb.
The extra call to aio_put_req() causes memory corruption.
(Note: This call was removed before, by patch as691, and then
mysteriously re-introduced later.)
Even if a read transfer is cancelled, we can and should send
to the user all the data that did manage to get transferred.
Testing for AIO cancellation in the I/O completion handler
is both racy and (now) unnecessary. aio_complete() does its
own checking, in a safe manner.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
David Brownell [Wed, 17 Jan 2007 06:56:26 +0000 (22:56 -0800)]
USB: gadgetfs race fix
This resolves a race in gadgetfs associated with changing device/ep0
when processing control requests. The fix is to change that state
earlier, when the control response is issued, so there's no window
in which userspace could see the wrong state; and enlarge the scope
of the spinlock during the ep0 request completion handler.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
David Brownell [Wed, 17 Jan 2007 06:53:58 +0000 (22:53 -0800)]
USB: gadgetfs simplifications
This simplifies event reading by eliminating arithmetic and being
more direct/obvious, and tweaks some debug messages slightly.
The math elimination will change timings, sometimes enough to
allow a race to appear.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Oliver Neukum [Sat, 13 Jan 2007 06:31:27 +0000 (07:31 +0100)]
USB: race fixes for usb-serial, step 2
- take BKL before looking up a driver to associate with a device to make
sure the module is not unloaded after looking up but before association
& bumping module count
Signed-off-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Oliver Neukum [Sat, 13 Jan 2007 06:29:26 +0000 (07:29 +0100)]
USB: race fixes for usb-serial step 1
- introduce a spinlock for serial_table to eliminate the window between
looking up a device and getting a reference
- delay inscription of a new device into serial_table until it is fully
initialised
- make sure disconnect() kills all URBs to avoid leckage across a soft unbind
Signed-off-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Rainer Weikusat [Wed, 3 Jan 2007 14:36:25 +0000 (15:36 +0100)]
fix for bugzilla #7544 (keyspan USB-to-serial converter)
At least the Keyspan USA-19HS USB-to-serial converter supports
two different configurations, one where the input endpoints
have interrupt transfer type and one where they are bulk endpoints.
The default UHCI configuration uses the interrupt input endpoints.
The keyspan driver, OTOH, assumes that the device has only bulk
endpoints (all URBs are initialized by calling usb_fill_bulk_urb
in keyspan.c/ keyspan_setup_urb). This causes the interval field
of the input URBs to have a value of zero instead of one, which
'accidentally' worked with Linux at least up to 2.6.17.11 but
stopped to with 2.6.18, which changed the UHCI support code handling
URBs for interrupt endpoints. The patch below modifies to driver to
initialize its input URBs either as interrupt or as bulk URBs,
depending on the transfertype contained in the associated endpoint
descriptor (only tested with the default configuration) enabling
the driver to again receive data from the serial converter.
David Brownell [Tue, 16 Jan 2007 20:46:39 +0000 (12:46 -0800)]
USB: at91_udc wakeup event updates
This updates the AT91 UDC driver's handling of wakeup events:
- Fix a bug in the original scheme, which was never updated after
the {enable,disable}_irq_wake() semantics were updated to address
refcounting issues (i.e. behave for shared irqs).
- Couple handling of both type of wakeup events, to be more direct. The
controller can be source of wakeup events for cases like bus reset
and USB resume. On some boards, VBUS sensing is also IRQ driven.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Alan Stern [Tue, 16 Jan 2007 16:59:45 +0000 (11:59 -0500)]
EHCI: force high-speed devices to run at full speed
This patch (as710) adds a sysfs class-device attribute file named
"companion" for EHCI controllers. The file contains a list of port
numbers that are dedicated to the companion controller; by writing a
port number to the file the user can force a high-speed device
attached directly to the computer to run at full speed. (As far as I
know it is not possible to do this for a device attached to an
external hub.) A port is removed from the file by writing the
negative of its port number.
Several users have asked for this facility and it seems like a useful
thing to have. Every now and then one runs across a device which
behaves much better at full speed than at high speed.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Alan Stern [Tue, 16 Jan 2007 16:58:47 +0000 (11:58 -0500)]
EHCI: don't hide ports owned by the companion
This patch (as709) changes the way ehci-hcd presents port status
values for ports owned by the companion controller. It no longer
hides the information; in particular, it allows the core to see the
disconnect event that occurs when a full- or low-speed device is
switched over to the companion. This is required for the next patch
in this series.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
projects / linux-2.6 / log