[POWERPC] of_serial: Fix possible null dereference.
The of_serial driver queries the current-speed property and attempts
to use it to register the custom_divisor property of the uart_port.
However, if current-speed is not set, then this code will dereference
a bad pointer. The fix is to only set custom_divisor when a
current-speed property appears in the device tree.
Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: John Linn <john.linn@xilinx.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Stefan Roese [Tue, 1 Apr 2008 13:45:00 +0000 (00:45 +1100)]
[POWERPC] 4xx: Fix PESDRn_UTLSET1 register setup on 460EX/GT
The patch fixes a bug, where the PESDRn_UTLSET1 register was setup
wrongly resulting in a non working PCIe port 1. With this fix both
PCIe ports work fine again.
Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Stefan Roese [Thu, 27 Mar 2008 15:34:50 +0000 (02:34 +1100)]
[POWERPC] 4xx: Only reset PCIe PHY on 405EX systems when no link is detected
Since the arch/powerpc PCI subsystem now does a complete re-assignment of
the resources, we can move from the unconditional PCIe PHY reset to the
conditional version. Now the PHY is only reset, if no link is established yet.
An additional PHY reset (one is already done in U-Boot) leads to problems
with some Atheros PCIe boards and some HP FPGA PCIe designs.
Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Robert Brose [Fri, 28 Mar 2008 20:20:23 +0000 (07:20 +1100)]
[POWERPC] Add kernel parameter to set l3cr for MPC745x
Old-world powermacs don't set L2CR or L3CR on processor upgrade cards.
This simple patch allows the setting of L3CR via a kernel parameter
(like the existing kernel parameter to set L2CR).
Signed-off-by: Robert Brose <bob@qbjnet.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
[POWERPC] PS3: Split device setup for static vs. dynamic devices
Split the device setup code in ps3_register_repository_device() in two
routines:
1. ps3_setup_static_device(), to handle the setup of static devices in the
PS3 repository, which can be __init,
2. ps3_setup_dynamic_device(), to handle the setup of storage devices that
may appear later in the PS3 repository.
WARNING: vmlinux.o(.text+0xb41b0): Section mismatch in reference from the
function .add_memory() to the function .devinit.text:.arch_add_memory()
The function .add_memory() references
the function __devinit .arch_add_memory().
This is often because .add_memory lacks a __devinit
annotation or the annotation of .arch_add_memory is wrong.
arch_add_memory() is also not __devinit on other architectures
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
WARNING: vmlinux.o(.text+0x1e4c0): Section mismatch in reference from the
function .move_device_tree() to the function .init.text:.lmb_alloc_base()
The function .move_device_tree() references
the function __init .lmb_alloc_base().
This is often because .move_device_tree lacks a __init
annotation or the annotation of .lmb_alloc_base is wrong.
move_device_tree() is called from early_init_devtree() only, which is __init
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
PS3 save power on halt:
- Replace infinite busy loops by smarter loops calling
lv1_pause() to save power.
- Add ps3_halt() and ps3_sys_manager_halt().
- Add __noreturn annotations.
Geoff Levand [Thu, 27 Mar 2008 20:41:45 +0000 (07:41 +1100)]
[POWERPC] PS3: Bootwrapper improvements
Improve the debugging support of the PS3 bootwraper code:
o Increase the size of the PS3 bootwrapper overlay from 256 to 512 bytes to
allow for more debugging code in the overlay.
o Use the dot symbol to set the size of __system_reset_overlay. The
assembler will then emit an error if the overlay code is too big.
o Remove some unused instructions.
o Update the text describing the PS3 bootwrapper overlay.
o Add a check for null pointer writes.
o Change hcall return value from s64.
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
The KSI8560 is a single compact, mid-, or full-size Advanced Mezzanine Card
(AdvancedMC™) based on the Freescale™ Semiconductor MPC8560 PowerQUICC III™
microprocessor. This product will serve in data and signaling applications such
as signaling gateways (SGW) and softswitch signaling interface cards.
The board has altera maxii CPLD, that is used to obtain and manage board
configuration. Also there are two SCC UART serial consoles and FCC ethernet,
that is routed to the front panel, while other ethernet controlers (TSEC's) are
routed to the backplane.
Signed-off-by: Alexandr Smirnov <asmirnov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Stefan Roese [Wed, 26 Mar 2008 11:39:50 +0000 (22:39 +1100)]
[POWERPC] 4xx: Add PPC4xx L2-cache support (440GX)
This patch adds support for the 256k L2 cache found on some IBM/AMCC
4xx PPC's. It introduces a common 4xx SoC file (sysdev/ppc4xx_soc.c)
which currently "only" adds the L2 cache init code. Other common 4xx
stuff can be added later here.
The L2 cache handling code is a copy of Eugene's code in arch/ppc
with small modifications.
Tested on AMCC Taishan 440GX.
Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Stefan Roese [Thu, 20 Mar 2008 10:33:39 +0000 (21:33 +1100)]
[POWERPC] 4xx: Add "amcc, haleakala" to the toplevel compatible property
Currently Haleakala uses the Kilauea platform code. This patch adds
"haleakala" to the compatible property, in case later kernel versions
will introduce a Haleakala platform code.
Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Major 259 has been assigned by lanana. Use it. Also, publish
/dev/icap[0-k] as the device entries, and register platform devices
named 'icap' to be consistent.
Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
[POWERPC] Xilinx: hwicap: Verify sync before reading idcode.
It appears that in some cases, the sync word might not be recognized
by the hardware correctly. If this happens, then attempting to read
from the port results in an unrecoverable error because of the design
of the FPGA core. This patch updates the code to check the status of
the device before reading the IDCODE, in order to avoid entering this
unrecoverable state. This patch also adds additional NOOP commands
into the sychronization sequence, which appears to be necessary to
avoid the condition on some hardware.
Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
[POWERPC] Xilinx: hwicap: Refactor status handling code.
Both the buffer-based and fifo-based icap cores have a status
register. Previously, this was only used internally to check whether
transactions have completed. However, the status can be useful to the
main driver as well. This patch exposes these status functions to the
main driver along with some masks for the differnet bits.
Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Stefan Roese [Thu, 13 Mar 2008 16:00:03 +0000 (03:00 +1100)]
[POWERPC] 4xx: Add TAH support to taishan dts
This patch adds TAH (TCP/IP Acceleration Hardware) support to the
taishan 440GX dts. It depends on the NEWEMAC/tah patch that adds the
compatible "ibm,tah" property to the matching table.
Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Josh Boyer [Fri, 7 Mar 2008 03:15:42 +0000 (21:15 -0600)]
[POWERPC] 4xx: Add platform support for the AMCC Yosemite board
The AMCC 440EP Yosemite board is very similar to the original AMCC Bamboo
board. This adds a YOSEMITE option to Kconfig, and reuses the existing
bamboo board support in the kernel.
Stefan Roese [Sat, 23 Feb 2008 21:08:27 +0000 (08:08 +1100)]
[POWERPC] 4xx: Add 460EX PCIe support to 4xx pci driver
All this code is needed to properly initialize the 460EX PCIe host
bridge(s). We re-initialize all ports again, even though this has been done
in the bootloader (U-Boot) before. This way we make sure, that we always
run the latest init code in Linux and don't depend on code versions from
U-Boot.
Unfortunately all IBM/AMCC chips currently supported in this PCIe driver need
a different reset-/init-sequence.
Tested on AMCC Canyonlands eval board.
Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Stefan Roese [Sat, 23 Feb 2008 21:07:41 +0000 (08:07 +1100)]
[POWERPC] 4xx: Add AMCC 460EX/460GT support to cputable.c & cpu_setup_44x.S
This patch adds basic support for the AMCC 460EX/460GT PPC's to arch/powerpc.
Currently those PPC's are still based on a 440 core and *not* a 460 core.
Here some basic features of those SoC's:
460EX:
- Up to 1.2GHz, 32kB L1 I-cache and D-cache, 256kB L2-cache, FPU
- 1 * PCI (max 66MHz), 2 * PCIe (one 4-lane, one 1-lane)
- 2 * GBit Ethernet with TCP/IP acceleration
- USB 2.0 Host/Device OTG and Host interface
- SATA controller
- Optional security feature
460GT (only changes to 460EX):
- 4 * GBit Ethernet with TCP/IP acceleration
- RapidIO
- No SATA
- No USB
Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
David Gibson [Tue, 26 Feb 2008 00:43:20 +0000 (11:43 +1100)]
[POWERPC] Start removing linux,network-index in favour of aliases
This patch alters the bootwrapper for a number of machines (roubhly
all 4xx based cuboot or treeboot platforms) to use aliases instead of
the linux,network-index hack to work out which MAC address to attach
to which ethernet device node.
The now obsolete linux,network-index properties are removed from the
corresponding device trees. This won't break backwards compatiblity,
because in cases where this fixup code is relevant, the device tree is
part of the kernel image.
The references to linux,network-index are removed from
booting-without-of.txt. Not only is it now deprecated, but as a hack
applicable only when the device tree blob and fixup code were in the
same image, this property never belonged in booting-without-of.txt
which describes the interface between the kernel and firmware or
bootloaders which produce a device tree. By the time the device tree
reaches the kernel, all the MAC addresses must be fully filled in.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Nathan Lynch [Sun, 23 Mar 2008 22:51:45 +0000 (09:51 +1100)]
[POWERPC] scanlog_init cleanup and minor fixes
scanlog_init() could use some love.
* properly return -ENODEV if this system doesn't support scan-log-dump
* don't printk if scan-log-dump not present; only older systems have it
* convert from create_proc_entry() to preferred proc_create()
* allocate zeroed data buffer
* fix potential memory leak of ent->data on failed create_proc_entry()
* simplify control flow
Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Manish Ahuja [Sat, 22 Mar 2008 00:40:53 +0000 (11:40 +1100)]
[POWERPC] pseries: phyp dump: Inform kdump when phyp-dump is loaded
This adds /sys/kernel/phyp_dump_active so that kdump init scripts may
look for it and take appropriate action if this file is found. This
file is only created when phyp_dump has been registered.
Signed-off-by: Manish Ahuja <mahuja@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Manish Ahuja [Sat, 22 Mar 2008 00:38:59 +0000 (11:38 +1100)]
[POWERPC] pseries: phyp dump: Disable phyp-dump through boot-var
This adds a kernel command line option "phyp_dump", which takes a 0/1
value for disabling/ enabling phyp_dump at boot time. Kdump can use
this on cmdline (phyp_dump=0) to disable phyp-dump during boot when
enabling itself. This will ensure only one dumping mechanism is active
at any given time.
Signed-off-by: Manish Ahuja <mahuja@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Manish Ahuja [Fri, 21 Mar 2008 23:47:04 +0000 (10:47 +1100)]
[POWERPC] pseries: phyp dump: Tracking memory range freed
This tracks the size freed. For now it does a simple rudimentary
calculation of the ranges freed. The idea is to keep it simple at the
external shell script level and send in large chunks for now.
Signed-off-by: Manish Ahuja <mahuja@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Manish Ahuja [Fri, 21 Mar 2008 23:39:17 +0000 (10:39 +1100)]
[POWERPC] pseries: phyp dump: Use sysfs to release reserved mem
Check to see if there actually is data from a previously
crashed kernel waiting. If so, allow user-space tools to
grab the data (by reading /proc/kcore). When user-space
finishes dumping a section, it must release that memory
by writing to sysfs. For example,
Manish Ahuja [Fri, 21 Mar 2008 23:37:08 +0000 (10:37 +1100)]
[POWERPC] pseries: phyp dump: Reserve and release memory
Initial patch for reserving memory in early boot, and freeing it
later. If the previous boot had ended with a crash, the reserved
memory would contain a copy of the crashed kernel data.
Tony Breeds [Mon, 17 Mar 2008 05:23:29 +0000 (16:23 +1100)]
[POWERPC] Update wait_state_cycles in the VPA
The hypervisor can look at the value in the wait_state_cycles field of
the VPA for an estimate of how busy dedicated processors are.
Currently, as the kernel never touches this field, we appear to be
100% busy. This records the duration the kernel is in powersave and
passes that to the HV to provide a reasonable indication of
utilisation.
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Nathan Lynch [Wed, 12 Mar 2008 23:43:05 +0000 (10:43 +1100)]
[POWERPC] maple: Enable ipr driver in defconfig
Some machines supported by the maple platform have an Obsidian
controller which can't be used without enabling CONFIG_IPR and the
options on which it depends.
Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Nathan Lynch [Wed, 12 Mar 2008 23:43:03 +0000 (10:43 +1100)]
[POWERPC] maple: Use platform name in define_machine()
Prevailing practice for define_machine() in powerpc is to use the
platform name when the platform has only one define_machine()
statement, but maple uses "maple_md". This caused me some
head-scratching when writing some new code that uses
machine_is(maple).
Use "maple" instead of "maple_md". There should not be any behavioral
change -- fixup_maple_ide() calls machine_is(maple) but the body of
the function is ifdef'd out.
Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
[POWERPC] Add 'model: ...' line to common show_cpuinfo()
Print out 'model' property of '/' node as a machine name
in generic show_cpuinfo() routine.
Signed-off-by: Marian Balakowicz <m8@semihalf.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
USB: Fix cut-and-paste error in rtl8150.c
USB: ehci: stop vt6212 bus hogging
USB: sierra: add another device id
USB: sierra: dma fixes
USB: add support for Motorola ROKR Z6 cellphone in mass storage mode
USB: isd200: fix memory leak in isd200_get_inquiry_data
USB: pl2303: another product ID
USB: new quirk flag to avoid Set-Interface
USB: fix gadgetfs class request delegation
PCIE has a mechanism to wait for Non-Posted request to complete. I think
pci_disable_device is a good place to do this.
Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Due to the regression reported at
http://bugzilla.kernel.org/show_bug.cgi?id=10065
Cc: Shaohua Li <shaohua.li@intel.com> Cc: Soeren Sonnenburg <kernel@nn7.de> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Mark Gross [Tue, 4 Mar 2008 22:59:31 +0000 (14:59 -0800)]
PCI: iova: lockdep false alarm fix
lockdep goes off on the iova copy_reserved_iova() because it and a function
it calls grabs locks in the from, and the to of the copy operation.
The function grab locks of the same lock classes triggering the warning. The
first lock grabbed is for the constant reserved areas that is never accessed
after early boot. Technically you could do without grabbing the locks for the
"from" structure its copying reserved areas from.
But dropping the from locks to me looks wrong, even though it would be ok.
The affected code only runs in early boot as its setting up the DMAR
engines.
This patch gives the reserved_ioval_list locks special lockdep classes.
Signed-off-by: Mark Gross <mgross@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Mapping of physical memory in UIO needs pgprot_noncached() to ensure
that IO memory is not cached. Without pgprot_noncached(), it (accidentally)
works on x86 and arm, but fails on PPC.
Rene Herman [Thu, 20 Mar 2008 07:58:16 +0000 (00:58 -0700)]
USB: ehci: stop vt6212 bus hogging
The VIA VT6212 defaults to only waiting 1us between passes over EHCI's
async ring, which hammers PCI badly ... and by preventing other devices
from accessing the bus, causes problems like drops in IDE throughput,
a problem that's been bugging users of those chips for several years.
A (partial) datasheet for this chip eventually turned up, letting us
see how to make it use a VIA-specific register to switch over to the
the normal 10us value instead, as suggested by the EHCI specification
Solution noted by Lev A. Melnikovsky.
It's not clear whether this register exists on other VIA chips; we
know that it's ineffective on the vt8235. So this patch only applies
to chips that seem to be incarnations of the (discrete) vt6212.
Signed-off-by: Rene Herman <rene.herman@gmail.com> Tested-by: Lev A. Melnikovsky <melnikovsky@mail.ru> Tested-by: Alessandro Suardi <alessandro.suardi@gmail.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Oliver Neukum [Fri, 14 Mar 2008 07:53:24 +0000 (00:53 -0700)]
USB: sierra: dma fixes
while I was adding autosuspend to that driver I noticed a few issues.
You were having DMAed buffers as a part of a structure.
This will fail on platforms that are not DMA-coherent (arm, sparc, ppc, ...)
Please test this patch to fix it.
Signed-off-by: Kevin Lloyd <klloyd@sierrawireless.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
USB: add support for Motorola ROKR Z6 cellphone in mass storage mode
Motorola ROKR Z6 cellphone has bugs in its USB, so it is impossible to use
it as mass storage. Patch describes new "unusual" USB device for it with
FIX_INQUIRY and FIX_CAPACITY flags and new BULK_IGNORE_TAG flag.
Last flag relaxes check for equality of bcs->Tag and us->tag in
usb_stor_Bulk_transport routine.
Signed-off-by: Constantin Baranov <const@tltsu.ru> Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net> Signed-off-by: Daniel Drake <dsd@gentoo.org> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Max Arnold [Thu, 20 Mar 2008 09:43:56 +0000 (16:43 +0700)]
USB: pl2303: another product ID
Device like this http://aldiga.com/english/A-100-USB-EDGE10.htm
contains Prolific 2303 chip.
Actually their site a bit outdated - I have AlDiga AL-11U
GSM/GPRS/EDGE modem and it works with pl2303 module after adding
corresponding product ID.
By default modem uses baud rate 460800. GSM chipset - SIMCom SIM600,
quad band 850/900/1800/1900 MHz
Alan Stern [Tue, 11 Mar 2008 14:20:12 +0000 (10:20 -0400)]
USB: new quirk flag to avoid Set-Interface
This patch (as1057) fixes a problem with the X-Rite/Gretag-Macbeth
Eye-One Pro display colorimeter; the device crashes when it receives a
Set-Interface request. A new quirk (USB_QUIRK_NO_SET_INTF) is
introduced and a quirks entry is created for this device.
Roy Hashimoto [Wed, 12 Mar 2008 21:55:31 +0000 (13:55 -0800)]
USB: fix gadgetfs class request delegation
gadgetfs (drivers/usb/gadget/inode.c) was not delegating all
non-device requests to userspace. This patch makes the handling of
all request cases consistent.
Signed-off-by: Roy Hashimoto <hashimot@alumni.caltech.edu> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Linus Torvalds [Tue, 25 Mar 2008 03:35:48 +0000 (20:35 -0700)]
Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
[POWERPC] mpc5200: Fix incorrect compatible string for the mdio node
[POWERPC] Update some defconfigs
Linus Torvalds [Tue, 25 Mar 2008 03:02:32 +0000 (20:02 -0700)]
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
[libata] ahci: SB600 workaround is suspect... play it safe for now
sata_promise: fix hardreset hotplug events, take 2
libata: improve HPA error handling
libata: assume no device is attached if both IDENTIFYs are aborted
pata_it821x: use raw nbytes in check_atapi_dma
libata: implement ata_qc_raw_nbytes()
sata_promise: fix hardreset hotplug events, take 2
A Promise SATA controller will signal hotplug events when a hard
reset (COMRESET) is done on a port. These events aren't masked by
the driver, and the unexpected interrupts will cause a sequence
of failed reset attempts util libata's EH finally gives up.
This has not been a common problem so far, but the pending libata
hardreset-by-default changes makes it a critical issue.
The solution is to disable hotplug events before a reset, and to
reenable them afterwards. (Promise's driver does this too.)
This patch adds SATA-specific versions of ->freeze() and ->thaw()
that also disable and enable hotplug events. PATA ports continue
to use the old versions of ->freeze() and ->thaw().
Accesses to the hotplug register must be serialised via host->lock.
We rely on ap->lock == &ap->host->lock and that libata takes this
lock before ->freeze() and ->thaw(). Document this requirement.
The interrupt handler is adjusted so its hotplug register accesses
are inside the region protected by host->lock.
Tested on various chips (SATA300TX4, SATA300TX2plus, SATAII150TX4,
FastTrack TX4000) with various combinations of SATA and PATA disks,
with and without the pending hardreset-by-default changes.
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Acked-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Linus Torvalds [Tue, 25 Mar 2008 02:25:08 +0000 (19:25 -0700)]
Make printk() console semaphore accesses sensible
The printk() logic on when/how to get the console semaphore was
unreadable, this splits the code up into a few helper functions and
makes it easier to follow what is going on.
Pavel Emelyanov [Mon, 24 Mar 2008 19:29:52 +0000 (12:29 -0700)]
bsd_acct: plain current->real_parent access is not always safe
This is minor, but dereferencing even current real_parent is not safe on debug
kernels, since the memory, this points to, can be unmapped - RCU protection is
required.
Besides, the tgid field is deprecated and is to be replaced with task_tgid_xxx
call (the 2nd patch), so RCU will be required anyway.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Author: Rik van Riel <riel@redhat.com>
Date: Thu Feb 7 00:14:08 2008 -0800
kswapd should only wait on IO if there is IO
The current kswapd (and try_to_free_pages) code has an oddity where the
code will wait on IO, even if there is no IO in flight. This problem is
notable especially when the system scans through many unfreeable pages,
causing unnecessary stalls in the VM.
Additionally, tasks without __GFP_FS or __GFP_IO in the direct reclaim path
will sleep if a significant number of pages are encountered that should be
written out. This gives kswapd a chance to write out those pages, while
the direct reclaim task sleeps.
Signed-off-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Because of large latencies and interactivity problems reported by Carlos,
here: http://lkml.org/lkml/2008/3/22/211
Cc: Rik van Riel <riel@redhat.com> Cc: "Carlos R. Mafra" <crmafra2@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Brownell [Mon, 24 Mar 2008 19:29:51 +0000 (12:29 -0700)]
hw_random doc updates
Update documentation for the hw_random support to be current:
- Documentation/hw_random.txt has been updated to reflect the
current code: it's a framework now, a "core" with a small
sysfs interface, that hardware-specific drivers plug in to.
Text specific to Intel hardware is now at the end.
- Kconfig now references the Documentation/hw_random.txt file
and better explains what this really does.
Both chunks of documentation now higlight the fact that the kernel entropy
pool is maintained by "rngd", and this driver has nothing directly to do with
that important task.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ahmed S. Darwish [Mon, 24 Mar 2008 19:29:49 +0000 (12:29 -0700)]
smackfs: remove redundant lock, fix open(,O_RDWR)
Older smackfs was parsing MAC rules by characters, thus a need of locking
write sessions on open() was needed. This lock is no longer useful now since
each rule is handled by a single write() call.
This is also a bugfix since seq_open() was not called if an open() O_RDWR flag
was given, leading to a seq_read() without an initialized seq_file, thus an
Oops.
Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com> Reported-by: Jonathan Corbet <corbet@lwn.net> Acked-by: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Yinghai Lu [Mon, 24 Mar 2008 19:29:45 +0000 (12:29 -0700)]
mm: fix boundary checking in free_bootmem_core
With numa enabled, some callers could have a range of memory on one node
but try to free that on other node. This can cause some pages to be
freed wrongly.
For example: when we try to allocate 128g boot ram early for
gart/swiotlb, and free that range later so gart/swiotlb can get some
range afterwards.
With this patch, we don't need to care which node holds the range, just
loop to call free_bootmem_node for all online nodes.
This patch makes free_bootmem_core() more robust by trimming the sidx
and eidx according the ram range that the node has.
And make the free_bootmem_core handle this out of range case. We could
use bdata_list to make sure the range can be freed for sure. So next
time, we don't need to loop online nodes and could use free_bootmem
directly.
Ingo van Lil [Mon, 24 Mar 2008 19:29:44 +0000 (12:29 -0700)]
mtd: memory corruption in block2mtd.c
The block2mtd driver (drivers/mtd/devices/block2mtd.c) will kfree an on-stack
pointer when handling an invalid argument line (e.g.
block2mtd=/dev/loop0,xxx).
The kfree was added some time ago when "name" was dynamically allocated.
Signed-off-by: Ingo van Lil <inguin@gmx.de> Acked-by: Joern Engel <joern@lazybastard.org> Cc: David Woodhouse <dwmw2@infradead.org> Cc: <stable@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Tejun Heo [Sun, 23 Mar 2008 12:05:15 +0000 (21:05 +0900)]
libata: improve HPA error handling
There's no point in retrying and eventually failing device detection
when the device rejects READ_NATIVE_MAX[_EXT]. Disable HPA unlocking
if READ_NATIVE_MAX[_EXT] is rejected as done when SET_MAX[_EXT] is
rejected.
This allows some old drives to work even if they aren't blacklisted.
Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
projects / karo-tx-linux.git / log