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  1. 27 Nov, 2004 27 commits
  3. 26 Nov, 2004 12 commits
    • Linus Torvalds's avatar
      Merge bk://bk.arm.linux.org.uk/linux-2.6-rmk · 38838b73
      Linus Torvalds authored 
      into ppc970.osdl.org:/home/torvalds/v2.6/linux
      38838b73
    • Peter Chubb's avatar
      [ARM PATCH] 2269/2: Updated Pleb-1 support patch for Linux 2.6 · a304bd27
      Peter Chubb authored 
      Patch from Peter Chubb

This patch REPLACES patch #2269/1

Instead of using the almost-obsolete SMC9194 driver, use the new
SMC91xx driver.

Signed-off-by: Peter Chubb
Signed-off-by: Russell King
      a304bd27
    • Ben Dooks's avatar
      [ARM PATCH] 2273/1: S3C2410 - timex.h CLOCK_TICK_RATE fix · 3b17edb6
      Ben Dooks authored 
      Patch from Ben Dooks

CLOCK_TICK_RATE is 12MHz on at least 2 s3c2410 based
machines, or close to it. Although this doesn't seem
to have any effect on loops_per_jiffie, it is best
to try and be accurate.

Signed-off-by: Ben Dooks
Signed-off-by: Russell King
      3b17edb6
    • Deepak Saxena's avatar
      [ARM PATCH] 2261/1: Cleanup use of ixp_reg_write in arch/arm/mach-ixp2000 · 963423ad
      Deepak Saxena authored 
      Patch from Lennert Buytenhek
  
Several files in this directory directly dereference pointers
to on-chip I/O instead of using ixp_reg_write, making them
susceptible to IXP2400 erratum #66. This changset fixes those.
We do not touch any files that will only be built for IXP2800
systems as the 2800 does not have this issue.
  

Signed-off-by: Lennert Buytenhek
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King
      963423ad
    • Deepak Saxena's avatar
      [ARM PATCH] 2260/1: Rename IXP2000_IRQ_SWI to reduce user confusion · 0364f754
      Deepak Saxena authored 
      Patch from Lennert Buytenhek

IXP2000 interrupt source zero is a software-generated interrupt source,
but it is not an SWI in the ARM sense of the word.  Rename the interrupt
source to reduce any confusion.
  

Signed-off-by: Lennert Buytenhek
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King
      0364f754
    • Deepak Saxena's avatar
      [ARM PATCH] 2259/1: Rip out ixp2000 IRQ_ERR_STATUS demultiplexing · ac1e7b88
      Deepak Saxena authored 
      Patch from Lennert Buytenhek
  
There are thirteen different IRQs chained off IRQ_ERR_STATUS, one for
each possible error class that the IXP can signal an interrupt for, but
there are no in-tree users of these interrupts, and it doesn't make much
sense to treat them as separate interrupts if we can just have one
handler checking each of the thirteen errors in one go instead.
  
Besides that, the error interrupt handling can't even have been working
properly in the first place as the chained handler was testing the wrong
bits in the IRQ_ERR_STATUS register.
  
So this patch rips it all out.
  

Signed-off-by: Lennert Buytenhek
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King
      ac1e7b88
    • Deepak Saxena's avatar
      [ARM PATCH] 2257/1: Add I2C device to IXDP2x01 platforms · 9ddd6ad2
      Deepak Saxena authored 
      Patch from Deepak Saxena

Signed-off-by: Deepak Saxena
Signed-off-by: Russell King
      9ddd6ad2
    • Deepak Saxena's avatar
      [ARM PATCH] 2255/1: Add IXDPG425 platform support · 68f1bfbb
      Deepak Saxena authored 
      Patch from Deepak Saxena

New IXP425 based platform from Intel. This machine is similar to
an ADI Coyote except for the addition of an on-board NEC ECHI
controller. Patch also fixes issue with board setup for Coyote
(and IXDPG425) that would cause the MTD driver to fail.

Signed-off-by: Deepak Saxena
Signed-off-by: Russell King
      68f1bfbb
    • Ingo Molnar's avatar
      [PATCH] floppy boot-time detection fix · 53373504
      Ingo Molnar authored 
      When the FDC hardware is initialized, it sometimes generates a floppy
interrupt right away - without being told to.  This interrupt can hit
the detection code that executes right after the initialization code, in
particular it can get intermixed with user_reset_fdc() that the
detection code uses.  The fd driver is fundamentally single-threaded
when it comes to handling events: an unexpected irq that arrives in the
wrong moment can confuse the reset_fdc() code, which, with softirq and
hardirq threading on, executes in keventd.

In the stock kernel this stale irq doesnt seem to hit the detection code
in the wrong moment, but i think under certain circumstances it may
still happen.  One of the typical incarnations of the race was the
following message:

 reset set in interrupt, calling c0258400

and googling for "reset set in interrupt, calling" does turn up a fair
number of bootlogs (most of them 2.4 ones) that show such a detection
failure, so i think upstream wants to have the fix too.

the fix is simple: delay a bit after initialization, to make sure the
stale irq does not interfere with the detection code. It will be safely
ignored, since do_floppy is still NULL. It might look sloppy that i went
for a delay, but delay i think it is better than waiting for the irq to
occur, because i dont think there's a guarantee that fdc initialization
triggers an interrupt, so waiting for it could hang the boot process. A
delay OTOH is totally harmless.

The attached patch implements this fix, which resolves the detection
problem on my testbox.

here's again how a failure looks like:

 Floppy drive(s): fd0 is 1.44M
 reset set in interrupt, calling c0258400
 floppy0: no floppy controllers found

and this is how it works with the fix:

 Floppy drive(s): fd0 is 1.44M
 FDC 0 is a post-1991 82077
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      53373504
    • Jens Axboe's avatar
      [PATCH] bio: fix leak in failure case in bio_copy_user() · d0b7fcbf
      Jens Axboe authored 
      There's a leak in the error case in bio_copy_user().  If we fail
allocating a page or adding a page to the bio, we will leak the bio map
data. 
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      d0b7fcbf
    • Jens Axboe's avatar
      [PATCH] cfq-iosched: fix allocation increment race #3 · 8c86608b
      Jens Axboe authored 
      There is a stupid error in cfq-iosched that spews a warning on
(typically) SMP systems because cfqq->allocated[rw] goes below zero. The
error is that the increment on alloc happens outside of the queue lock.
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      8c86608b
    • Paul Mackerras's avatar
      [PATCH] ppc64: fix hang on legacy iSeries · 5bc58b21
      Paul Mackerras authored 
      Recently we have uncovered a bug in the kernel exception exit path
which can cause iSeries machines to hang with interrupts disabled,
typically when unloading a module.  This patch fixes the bug and
should go in 2.6.10.  Here is the detailed explanation:

There are a couple of places in the exception exit path in entry.S
where we disable interrupts and then later reenable them.  We
hard-disable interrupts even on legacy iSeries (rather than
soft-disabling them) because the final part of the exception exit path
needs interrupts hard-disabled (even on legacy iSeries), because
otherwise an incoming interrupt could trash SRR0 and SRR1 and cause us
to lose state.

The intention was that each path that hard-disabled interrupts would
hard-enable them again, either explicitly or by executing an rfid
instruction (return from interrupt, doubleword).  However there was
one path where we didn't correctly hard-enable interrupts.  This meant
we could end up calling schedule() with interrupts hard-disabled and
then switch to the stopmachine thread (used in removing a module),
which spins polling a variable until another cpu changes it.  Since
local_irq_enable() etc. on legacy iSeries only soft-enable interrupts,
we got into the stopmachine thread with interrupts hard-disabled, and
the machine hung at that point.

This patch fixes it by making sure that when we go to re-enable
interrupts, the MSR value we are loading up actually does have the
MSR.EE (external interrupt enable) bit set.  Stephen Rothwell has
verified that this actually does fix the bug on iSeries.  The bug
also potentially exists on pSeries (and this patch fixes it), but
there it doesn't really matter, because schedule() will enable
interrupts (and on pSeries that means hard-enabling them), and because
the hypervisor doesn't mind you having interrupts hard-disabled for
extended periods on pSeries.  Note that all these comments about
pSeries also apply to POWER5 iSeries (i5) machines.

While I was there I noticed that we were jumping to ret_from_except
after calling do_IRQ on iSeries, rather than ret_from_except_lite,
meaning that we will restore registers 14-31 twice, unnecessarily.  I
changed it to jump to ret_from_except_lite instead, and Stephen
checked that this change doesn't cause any breakage.
Signed-off-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      5bc58b21
  5. 25 Nov, 2004 1 commit
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