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* [MIPS] IP27: Tighten up CPU description to fix warnings.Ralf Baechle2008-03-12
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix plat_ioremap for JMR3927Atsushi Nemoto2008-03-12
| | | | | | | TX39XX's "reserved" segment in CKSEG3 area is 0xff000000-0xfffeffff. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Export __ucmpdi2 to modules.Ralf Baechle2008-03-12
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix typo in commentThiemo Seufer2008-03-12
| | | | | | | We support now other page sizes as well. Signed-off-by: Thiemo Seufer <ths@networkno.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Use KBUILD_DEFCONFIGAdrian Bunk2008-03-12
| | | | | | | With KBUILD_DEFCONFIG we don't have to ship a second copy of ip22_defconfig. Signed-off-by: Adrian Bunk <adrian.bunk@movial.fi> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Allow 48Hz to be selected if CONFIG_SYS_SUPPORTS_ARBIT_HZ is set.Ralf Baechle2008-03-12
| | | | | | | | This allows a 48Hz clock to be selected on Malta and other systems. Note this not normally a sensible option as it results in rather high latencies for some kernel stuff. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Added missing cases for rdhwr emulationChris Dearman2008-03-12
| | | | | | | | | | Some of these are architecturally required for R2 processors so lets try to be bit closer to the real thing. This also provides access to the CPU cycle timer, even on multiprocessors. In that aspect its currently bug compatible to what would happen on a R2-based SMP. Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Alchemy: Fix ids in Alchemy db dma device tableWolfgang Ocker2008-03-12
| | | | | | | | | 0 is a valid device id (DSCR_CMD0_UART0_TX), so we can't use it to mark an empty entry in the device table. Use ~0 instead and search for id ~0 when looking for a free entry. Signed-off-by: Wolfgang Ocker <weo@reccoware.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2008-03-11
|\ | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: x86: remove quicklists x86: ia32 syscall restart fix x86: ioremap, remove WARN_ON()
| * x86: remove quicklistsThomas Gleixner2008-03-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | quicklists cause a serious memory leak on 32-bit x86, as documented at: http://bugzilla.kernel.org/show_bug.cgi?id=9991 the reason is that the quicklist pool is a special-purpose cache that grows out of proportion. It is not accounted for anywhere and users have no way to even realize that it's the quicklists that are causing RAM usage spikes. It was supposed to be a relatively small pool, but as demonstrated by KOSAKI Motohiro, they can grow as large as: Quicklists: 1194304 kB given how much trouble this code has caused historically, and given that Andrew objected to its introduction on x86 (years ago), the best option at this point is to remove them. [ any performance benefits of caching constructed pgds should be implemented in a more generic way (possibly within the page allocator), while still allowing constructed pages to be allocated by other workloads. ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: ia32 syscall restart fixRoland McGrath2008-03-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code to restart syscalls after signals depends on checking for a negative orig_ax, and for particular negative -ERESTART* values in ax. These fields are 64 bits and for a 32-bit task they get zero-extended. The syscall restart behavior is lost, a regression from a native 32-bit kernel and from 64-bit tasks' behavior. This patch fixes the problem by doing sign-extension where it matters. For orig_ax, the only time the value should be -1 but winds up as 0x0ffffffff is via a 32-bit ptrace call. So the patch changes ptrace to sign-extend the 32-bit orig_eax value when it's stored; it doesn't change the checks on orig_ax, though it uses the new current_syscall() inline to better document the subtle importance of the used of signedness there. The ax value is stored a lot of ways and it seems hard to get them all sign-extended at their origins. So for that, we use the current_syscall_ret() to sign-extend it only for 32-bit tasks at the time of the -ERESTART* comparisons. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: ioremap, remove WARN_ON()Ingo Molnar2008-03-11
| | | | | | | | Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'for-linus' of ↵Linus Torvalds2008-03-11
|\ \ | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel: keep rd->online and cpu_online_map in sync Revert "cpu hotplug: adjust root-domain->online span in response to hotplug event"
| * | keep rd->online and cpu_online_map in syncGregory Haskins2008-03-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is possible to allow the root-domain cache of online cpus to become out of sync with the global cpu_online_map. This is because we currently trigger removal of cpus too early in the notifier chain. Other DOWN_PREPARE handlers may in fact run and reconfigure the root-domain topology, thereby stomping on our own offline handling. The end result is that rd->online may become out of sync with cpu_online_map, which results in potential task misrouting. So change the offline handling to be more tightly coupled with the global offline process by triggering on CPU_DYING intead of CPU_DOWN_PREPARE. Signed-off-by: Gregory Haskins <ghaskins@novell.com> Cc: Gautham R Shenoy <ego@in.ibm.com> Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | Revert "cpu hotplug: adjust root-domain->online span in response to hotplug ↵Gregory Haskins2008-03-11
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | event" This reverts commit 393d94d98b19089ec172566e23557997931b137e. Lets fix this right. Signed-off-by: Gregory Haskins <ghaskins@novell.com> Cc: Gautham R Shenoy <ego@in.ibm.com> Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'for-linus' of ↵Linus Torvalds2008-03-11
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: RDMA/iwcm: Don't access a cm_id after dropping reference IB/iser: Handle iser_device allocation error gracefully IB/iser: Fix list iteration bug RDMA/cxgb3: Fix iwch_create_cq() off-by-one error RDMA/cxgb3: Return correct max_inline_data when creating a QP IB/fmr_pool: Flush all dirty FMRs from ib_fmr_pool_flush() Revert "IB/fmr_pool: ib_fmr_pool_flush() should flush all dirty FMRs" IB/cm: Flush workqueue when removing device MAINTAINERS: update ipath owner
| * RDMA/iwcm: Don't access a cm_id after dropping referenceSteve Wise2008-03-11
| | | | | | | | | | | | | | | | | | | | cm_work_handler() can access cm_id_priv after it drops its reference by calling iwch_deref_id(), which might cause it to be freed. The fix is to look at whether IWCM_F_CALLBACK_DESTROY is set _before_ dropping the reference. Then if it was set, free the cm_id on this thread. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| * IB/iser: Handle iser_device allocation error gracefullyArne Redlich2008-03-11
| | | | | | | | | | | | | | | | "iser_device" allocation failure is "handled" with a BUG_ON() right before dereferencing the NULL-pointer - fix this! Signed-off-by: Arne Redlich <arne.redlich@xiranet.com> Signed-off-by: Erez Zilber <erezz@voltaire.com>
| * IB/iser: Fix list iteration bugArne Redlich2008-03-11
| | | | | | | | | | | | | | | | | | | | | | | | The iteration through the list of "iser_device"s during device lookup/creation is broken -- it might result in an infinite loop if more than one HCA is used with iSER. Fix this by using list_for_each_entry() instead of the open-coded flawed list iteration code. Signed-off-by: Arne Redlich <arne.redlich@xiranet.com> Signed-off-by: Erez Zilber <erezz@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| * RDMA/cxgb3: Fix iwch_create_cq() off-by-one errorJon Mason2008-03-09
| | | | | | | | | | | | | | | | | | | | The cxbg3 driver is unnecessarily decreasing the number of CQ entries by one when creating a CQ. This will cause the CQ not to have as many entries as requested by the user if the user requests a power of 2 size. Signed-off-by: Jon Mason <jon@opengridcomputing.com> Acked-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| * RDMA/cxgb3: Return correct max_inline_data when creating a QPJon Mason2008-02-29
| | | | | | | | | | | | | | | | | | Set cap.max_inline_data to the actual max inline data that the adapter support, so that userspace apps see the right value returned. Signed-off-by: Jon Mason <jon@opengridcomputing.com> Acked-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| * IB/fmr_pool: Flush all dirty FMRs from ib_fmr_pool_flush()Pete Wyckoff2008-02-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit a3cd7d90 ("IB/fmr_pool: ib_fmr_pool_flush() should flush all dirty FMRs") caused a regression for iSER and was reverted in e5507736. This change attempts to redo the original patch so that all used FMR entries are flushed when ib_flush_fmr_pool() is called without affecting the normal FMR pool cleaning thread. Simply move used entries from the clean list onto the dirty list in ib_flush_fmr_pool() before letting the cleanup thread do its job. Signed-off-by: Pete Wyckoff <pw@osc.edu> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| * Revert "IB/fmr_pool: ib_fmr_pool_flush() should flush all dirty FMRs"Pete Wyckoff2008-02-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit a3cd7d9070be417a21905c997ee32d756d999b38. The original commit breaks iSER reliably, making it complain: iser: iser_reg_page_vec:ib_fmr_pool_map_phys failed: -11 The FMR cleanup thread runs ib_fmr_batch_release() as dirty entries build up. This commit causes clean but used FMR entries also to be purged. During that process, another thread can see that there are no free FMRs and fail, even though there should always have been enough available. Signed-off-by: Pete Wyckoff <pw@osc.edu> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| * IB/cm: Flush workqueue when removing deviceSean Hefty2008-02-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When a CM MAD is received, it is queued to a CM workqueue for processing. The queued work item references the port and device on which the MAD was received. If that device is removed from the system before the work item can execute, the work item will reference freed memory. To fix this, flush the workqueue after unregistering to receive MAD, and before the device is be freed. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
| * MAINTAINERS: update ipath ownerArthur Jones2008-02-29
| | | | | | | | | | | | | | | | | | I'll be leaving QLogic soon for another job and Ralph has graciously offered to take over the IPath driver maintainership. Signed-off-by: Arthur Jones <arthur.jones@qlogic.com> Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
* | Merge branch 'upstream-linus' of ↵Linus Torvalds2008-03-10
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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] Add support for the RB500 PATA CompactFlash ahci: logical-bitwise and confusion in ahci_save_initial_config() libata: don't allow sysfs read access to force param ahci: add the Device IDs for nvidia MCP7B AHCI libata-sff: handle controllers w/o ctl register libata: allow LLDs w/o any reset method ata: replace remaining __FUNCTION__ occurrences
| * | [libata] Add support for the RB500 PATA CompactFlashFlorian Fainelli2008-03-10
| | | | | | | | | | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | ahci: logical-bitwise and confusion in ahci_save_initial_config()Roel Kluin2008-03-10
| | | | | | | | | | | | | | | | | | | | | logical-bitwise & confusion Signed-off-by: Roel Kluin <12o3l@tiscali.nl> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | libata: don't allow sysfs read access to force paramTejun Heo2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Buffer for force param is deallocated after initialization, so trying to read it via sysfs results in oops. Don't allow read access to the param node. Spotted by Eric Sesterhenn. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | ahci: add the Device IDs for nvidia MCP7B AHCIpeerchen2008-03-10
| | | | | | | | | | | | | | | Signed-off-by: Peer Chen <peerchen@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | libata-sff: handle controllers w/o ctl registerTejun Heo2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SFF incorrectly assumed that ctl register is available for all controllers while some old SFF controllers don't have ctl register. Make SFF handle controllers w/o ctl register by conditionalizing ctl register access and softreset method. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | libata: allow LLDs w/o any reset methodTejun Heo2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some old SFF controllers don't have any way to reset the channel. Currently, this isn't supported and libata EH causes an oops. Allow LLDs w/o any reset method and just assume ATA class in such cases. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * | ata: replace remaining __FUNCTION__ occurrencesHarvey Harrison2008-03-10
| | | | | | | | | | | | | | | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6Linus Torvalds2008-03-10
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: USB:Update mailing list information in documentation USB: fix ehci unlink regressions USB: new ftdi_sio device id USB: Remove __KERNEL__ check from non-exported gadget.h. USB: g_printer.h does not need to be "unifdef"ed. USB: fsl_usb2_udc: fix broken Kconfig USB: option: add novatel device ids USB: usbaudio: handle kcalloc failure USB: cypress_m8: add UPS Powercom (0d9f:0002) USB: drivers/usb/storage/sddr55.c: fix uninitialized var warnings USB: fix usb-serial generic recursive lock
| * | | USB:Update mailing list information in documentationRobert P. J. Day2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | USB: fix ehci unlink regressionsDavid Brownell2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The recent EHCI driver update to split the IAA watchdog timer out from the other timers made several things work better, but not everything; and it created a couple new issues in bugzilla. Ergo this patch: - Handle a should-be-rare SMP race between the watchdog firing and (very late) IAA interrupts; - Remove a shouldn't-have-been-added WARN_ON() test; - Guard against one observed OOPS; - If this watchdog fires during clean HC shutdown, it should act as a NOP instead of interfering with the shutdown sequence; - Guard against silicon errata hypothesized by some vendors: * IAA status latch broken, but IAAD cleared OK; * IAAD wasn't cleared when IAA status got reported; The WARN_ON is in bugzilla as 10168; the OOPS as 10078; these are both regressions. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Tested-by: Gordon Farquharson <gordonfarquharson@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | USB: new ftdi_sio device idMirko Bordignon2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Here is a patch that adds support for the propox jtagcable II dongle (http://www.propox.com/products/t_117.html): their PID was missing, therefore we were not able to have the device recognized though it uses a standard FTDI chip. Signed-off-by: Mirko Bordignon <mirko.bordignon@ieee.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | USB: Remove __KERNEL__ check from non-exported gadget.h.Robert P. J. Day2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the header file gadget.h isn't being exported to userspace, there seems to be little point having a __KERNEL__ proprocessor check. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | USB: g_printer.h does not need to be "unifdef"ed.Robert P. J. Day2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the header file g_printer.h doesn't depend on __KERNEL__, there's no need to unifdef it in the Kbuild file. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | USB: fsl_usb2_udc: fix broken KconfigLi Yang2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch fixes broken Kconfig caused by the name change of MPC834x option. It also makes fsl_usb2_udc selectable on new platforms like MPC837x. Signed-off-by: Li Yang <leoli@freescale.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | USB: option: add novatel device idsDirk DeSchepper2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This updates the option driver with a lot more novatel driver ids. From: Dirk DeSchepper <ddeschepper@nvtl.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | USB: usbaudio: handle kcalloc failureJim Meyering2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sound/usb/usbaudio.c (check_hw_params_convention): Handle kcalloc failure. Signed-off-by: Jim Meyering <meyering@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | USB: cypress_m8: add UPS Powercom (0d9f:0002)Dmitry Shapin2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for UPS Powercom USB interface (0d9f:0002) in chip CY7C63723. In my case, this Powercom BNT800AP. Signed-off-by: Dmitry Shapin <shapin@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | USB: drivers/usb/storage/sddr55.c: fix uninitialized var warningsAndrew Morton2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | drivers/usb/storage/sddr55.c: In function 'sddr55_transport': drivers/usb/storage/sddr55.c:526: warning: 'deviceID' may be used uninitialized in this function drivers/usb/storage/sddr55.c:525: warning: 'manufacturerID' may be used uninitialized in this function Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | USB: fix usb-serial generic recursive lockPete Zaitcev2008-03-10
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Nobody should be using the generic usb-serial for anything other than testing. Still, it's not a good thing that it's easy to lock up. There is a traceback from NMI oopser here: https://bugzilla.redhat.com/show_bug.cgi?id=431379 But in short, if a line discipline has a chance to echo anything, input can loop back a write method. So, don't call tty_flip_buffer_push from under a lock taken on write path. Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | fix BIOS PCI config cycle buglet causing ACPI boot regressionIngo Molnar2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I figured out another ACPI related regression today. randconfig testing triggered an early boot-time hang on a laptop of mine (32-bit x86, config attached) - the screen was scrolling ACPI AML exceptions [with no serial port and no early debugging available]. v2.6.24 works fine on that laptop with the same .config, so after a few hours of bisection (had to restart it 3 times - other regressions interacted), it honed in on this commit: | 10270d4838bdc493781f5a1cf2e90e9c34c9142f is first bad commit | | Author: Linus Torvalds <torvalds@woody.linux-foundation.org> | Date: Wed Feb 13 09:56:14 2008 -0800 | | acpi: fix acpi_os_read_pci_configuration() misuse of raw_pci_read() reverting this commit ontop of -rc5 gave a correctly booting kernel. But this commit fixes a real bug so the real question is, why did it break the bootup? After quite some head-scratching, the following change stood out: - pci_id->bus = tu8; + pci_id->bus = val; pci_id->bus is defined as u16: struct acpi_pci_id { u16 segment; u16 bus; ... and 'tu8' changed from u8 to u32. So previously we'd unconditionally mask the return value of acpi_os_read_pci_configuration() (raw_pci_read()) to 8 bits, but now we just trust whatever comes back from the PCI access routines and only crop it to 16 bits. But if the high 8 bits of that result contains any noise then we'll write that into ACPI's PCI ID descriptor and confuse the heck out of the rest of ACPI. So lets check the PCI-BIOS code on that theory. We have this codepath for 8-bit accesses (arch/x86/pci/pcbios.c:pci_bios_read()): switch (len) { case 1: __asm__("lcall *(%%esi); cld\n\t" "jc 1f\n\t" "xor %%ah, %%ah\n" "1:" : "=c" (*value), "=a" (result) : "1" (PCIBIOS_READ_CONFIG_BYTE), "b" (bx), "D" ((long)reg), "S" (&pci_indirect)); Aha! The "=a" output constraint puts the full 32 bits of EAX into *value. But if the BIOS's routines set any of the high bits to nonzero, we'll return a value with more set in it than intended. The other, more common PCI access methods (v1 and v2 PCI reads) clear out the high bits already, for example pci_conf1_read() does: switch (len) { case 1: *value = inb(0xCFC + (reg & 3)); which explicitly converts the return byte up to 32 bits and zero-extends it. So zero-extending the result in the PCI-BIOS read routine fixes the regression on my laptop. ( It might fix some other long-standing issues we had with PCI-BIOS during the past decade ... ) Both 8-bit and 16-bit accesses were buggy. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/pci-2.6Linus Torvalds2008-03-10
|\ \ \ | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/pci-2.6: PCI Hotplug: Fix small mem leak in IBM Hot Plug Controller Driver PCI: rename DECLARE_PCI_DEVICE_TABLE to DEFINE_PCI_DEVICE_TABLE
| * | | PCI Hotplug: Fix small mem leak in IBM Hot Plug Controller DriverJesper Juhl2008-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In drivers/pci/hotplug/ibmphp_ebda.c::ebda_rsrc_controller(), storage is allocated with kzalloc() and assigned to 'tmp_slot'. Then lots of stuff, like ->flag, ->supported_speed etc is set in tmp_slot. A bit further down there's then this test : if (!bus_info_ptr1) { rc = -ENODEV; goto error; } At this point, tmp_slot has not been assigned to anything, so when erroring-out we want to free it, but nothing at the 'error:' label free's 'tmp_slot' - and we can't really free 'tmp_slot' at 'error:' since we may jump to that label later when 'tmp_slot' *has* been used and we do not want it freed. So, the only sane option left seems to be to kfree(tmp_slot) just before jumping to the 'error:' label in the one place where this is what actually makes sense. The following patch does just that and thus kills off a tiny potential memory leak. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | PCI: rename DECLARE_PCI_DEVICE_TABLE to DEFINE_PCI_DEVICE_TABLEAndrew Morton2008-03-10
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | a) DECLARE_PCI_DEVICE_TABLE is misnamed. It is used to *define* tables, not to declare them. It should be called DEFINE_PCI_DEVICE_TABLE. b) It's lame, anyway. We could implement any number of such helper thingies, but we choose not to. So I wouldn't go adding code which uses this thing until it has a correct name, and until we've decided that we actually want to live with it. From: Andrew Morton <akpm@linux-foundation.org> Cc: Jonas Bonn <jonas@southpole.se> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6Linus Torvalds2008-03-10
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6: drivers: fix dma_get_required_mask firmware: provide stubs for the FW_LOADER=n case nozomi: fix initialization and early flow control access sysdev: fix problem with sysdev_class being re-registered
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