This is the final patch to make sd work properly in a hotplug
enviroment.  Add a bitmap for currently used disks so that we
can properly reuse dev_t when a disk is hot-unplugged.

While at that add support for the eight additional majors
allocated to sd in the latest devices.txt [1].

If only register_blkdev finally died we could nuke almost all
knowledge of majors/minors from sd...

[1] http://www.lanana.org/docs/device-list/devices.txt

(1) move all bdev methods in one place instead of spreading them all
    around the file
(2) consistant naming: everything is sd_<operation> now
(3) use scsi_device_get/scsi_device_put
(4) remove bogus checks scsi_disk->device set, since 2.5.4x it always is
(5) clean up some coding style issues

Two new helpers: scsi_device_get and scsi_device_put that get/release a
reference to the underlying HBA driver and increment/decrement
->access_count.  Cleanup ->attach/->detach routines in the upper layer
drivers a bit to consolidate the error pathes once we're cleaning them
up.

->attach and ->detach in upper layer drivers are mandatory now (not
having them would be rather pointless).

(note that the sd.c changes are not in this patch, it'll be part of
my next, bigger patch)

I have attached an updated combined patch of my previously posted sysfs
changes. 

This patch is against linux-scsi.bkbits.net/scsi-misc-2.5

This patch contains these updates:
	- update to osst.c to support sysfs cleanups.
	- oops fix in osst.c detach if no device attached. A better
	  method than this quick fix is needed.
	- removed scsi_bus_hotplug function do to bug and not really
	  needed now as default gives path data. If needed in future can
	  be added with better definition.

-andmike

into mulgrave.(none):/home/jejb/BK/scsi-misc-new-2.5

into home.transmeta.com:/home/torvalds/v2.5/linux

into kroah.com:/home/linux/linux/BK/gregkh-2.5

1-fix-lowlat:

QA found that running all four ports at 460800 would drop data. I
traced it to data being dropped in the read callback because the flip
buffers were full. Turning on the low latency flag fixed things.

2-fix-taint

A side-effect of turning on low latency; the interrupt context from
the callback is now passed through to the tty layer, passing it on to
calls back into usb-serial.c. Which causes deadlocks when trying to
re-acquire the per-port semaphore. We've already talked about this.
This patch is my work-around for the usb-serial.c brokenness.
Basically, implemement a buffering scheme, and schedule a software
interrupt to handle the data handoff to the tty layer sometime later.
urb_pool_size defaults to 8, but is a module parameter and can be
modified at runtime.
The buffering is needed so that the driver can run while data is
waiting to be processed, but I could have used the tty layer
scheduling instead of doing my own by turning off low latency.
However, I looked at the tty layer and it seems to me that there's
nothing preventing a really fast device from flipping one buffer,
flipping the next, and flipping back to the still full buffer from
before (actually, the flip just gets scheduled for later), so my
driver needs to be able to hold onto buffered data and schedule them
for processing later anyway. So, might as well leave low_latency on.


diff -Naur linux-2.5.49-0-virgin/drivers/usb/serial/whiteheat.c linux-2.5.49-1-fix-
lowlat/drivers/usb/serial/whiteheat.c

Attached is a patch that changes the 2.5.x disconnect to be similar to
2.4.x disconnect. This doesn't fix the race, but does shrink the
window such that I've never seen it trigger, even under testing
designed to do that.

There doesn't seem to be a good way to fix the race. The fix should be
to have _disconnect force any sleeping semaphore holders to run to
completion between the end of the loop in the patch below and the spot
where the underlying memory is freed, but I don't see a way to do
that.


diff -Naur linux-2.5.49-2-fix-taint/drivers/usb/serial/usb-serial.c linux-2.5.49-3-fix-drvdata/drivers/usb/serial/usb-
serial.c

This patch cleans up the vicam_decode_color function by removing
unused/useless variables and combining the two "x" loops inside the
y loop into one. It also reduces the number of times that the "x"
loop occurs from 512 to 320 which should provide a decent speed
increase. It also fixes a bug in the y loop that wrote beyond its bound.

After a little absence, here's a patch to bring the Philips Webcam driver up
to version 8.9 (skipping 8.8 which has been available as a download on my
website for a while).

This patch is against 2.5.49, and includes some of the following:
* New USB IDs for Logitech and Visionite webcams.
* Better URB link/unlink sequence when opening/closing device
  and switching resolutions.
* Adding probe for CCD/CMOS sensor type.
* Removed remnants of YUV420 palette stuff.

Also updated the description in 'Kconfig'.

Add `unlikely' to error-return path in v850 __syscall_return macro

Shrink v850 exception-trap handling code a bit

Change type of v850 function `gbus_int_disable_irqs' to void

Make v850 syscall6 macro support both old and new gcc versions

Add id for v850 `nb85e_uart' to serial_core.h

Give a compile-time error on the v850 if MAX_ORDER is too large

Make the v850 leds driver's seek routine always return a value

Update make variable used by initramfs `binary blob' creation on v850

Change the default baud rate of the `nb85e_uart' driver to 115200

Tweak some v850 name strings
[basically only affects printed output]

Random whitespace tweaks in v850 files

Add my name to CREDITS file

Update includes in v850 files to reflect recent header changes

Update v850 to use kstat_cpu in irqs.c

The v850 doesn't need sys_old_getrlimit

Add TASK_UNMAPPED_BASE for v850

Update v850 usage of do_fork to supply new args

Add v850 support for initramfs

Random minor fixes for v850 `anna' platform

Update `nb85e_uart' driver for recent serial framework changes