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2010-10-24i7core_edac: don't use a freed mci structMauro Carvalho Chehab
This is a nasty bug. Since kobject count will be reduced by zero by edac_mc_del_mc(), and this triggers the kobj release method, the mci memory will be freed automatically. So, all we have left is ctl_name, as shown by enabling debug: [ 80.822186] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1020: edac_remove_sysfs_mci_device() remove_link [ 80.832590] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1024: edac_remove_sysfs_mci_device() remove_mci_instance [ 80.843776] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 640: edac_mci_control_release() mci instance idx=0 releasing [ 80.855163] EDAC MC: Removed device 0 for i7core_edac.c i7 core #0: DEV 0000:3f:03.0 [ 80.862936] EDAC DEBUG: in drivers/edac/i7core_edac.c, line at 2089: (null): free structs [ 80.871134] EDAC DEBUG: in drivers/edac/edac_mc.c, line at 238: edac_mc_free() [ 80.878379] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 726: edac_mc_unregister_sysfs_main_kobj() [ 80.888043] EDAC DEBUG: in drivers/edac/i7core_edac.c, line at 1232: drivers/edac/i7core_edac.c: i7core_put_devices() Also, kfree(mci) shouldn't happen at the kobj.release, as it happens when edac_remove_sysfs_mci_device() is called, but the logic is: edac_remove_sysfs_mci_device(mci); edac_printk(KERN_INFO, EDAC_MC, "Removed device %d for %s %s: DEV %s\n", mci->mc_idx, mci->mod_name, mci->ctl_name, edac_dev_name(mci)); So, as the edac_printk() needs the mci struct, this generates an OOPS. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-24edac_core: Print debug messages at release callsMauro Carvalho Chehab
This is important to track a nasty bug at the free logic. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-24edac_core: Don't let free(mci) happen while using itMauro Carvalho Chehab
A very nasty bug were happening on edac core, due to the way mci objects are freed. mci memory is freed when kobject count reaches zero, by edac_mci_control_release(). However, from the logs, this is clearly happening before the final usage of mci struct: [15799.607454] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 640: edac_mci_control_release() mci instance idx=0 releasing [15799.618773] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 769: edac_inst_grp_release() [15799.627326] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 894: edac_remove_mci_instance_attributes() end of seeking for group all_channel_counts [15799.640887] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 877: edac_remove_mci_instance_attributes() sysfs_attrib = ffffffffa01d7240 [15799.653412] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1020: edac_remove_sysfs_mci_device() remove_link [15799.663753] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1024: edac_remove_sysfs_mci_device() remove_mci_instance Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-24edac_core: Do a better job with node removalMauro Carvalho Chehab
Make sure we remove groups at the right order Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-24i7core_edac: explicitly remove PCI devices from the devices listMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-24i7core_edac: MCE NMI handling should stop firstMauro Carvalho Chehab
Otherwise, a NMI may happen causing a race condition and a panic. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-24i7core_edac: Initialize all priv vars before start pollingMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-24i7core_edac: Improve debug to seek for register/remove errorsMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-24i7core_edac: move #if PAGE_SHIFT to edac_core.hMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-24i7core_edac: Properly mark const static vars as suchMauro Carvalho Chehab
There are two groups of sysfs attributes: one for rdimm and another for udimm. Instead of changing dynamically the unique static struct for handling udimm's, declare two vars and make them constant. This avoids the risk of having two or more memory controllers, each needing a different set of attributes. While here, use const on all places where it is applicable. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com> edac_core: use const for constant sysfs arguments Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-24i7core_edac: move static vars to the beginning of the fileMauro Carvalho Chehab
While here, don't initialize probed with 0. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-24i7core_edac: Be sure that the edac pci handler will be properly releasedMauro Carvalho Chehab
With multi-sockets, more than one edac pci handler is enabled. Be sure to un-register all instances. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bpLinus Torvalds
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: (21 commits) EDAC, MCE: Fix shift warning on 32-bit EDAC, MCE: Add a BIT_64() macro EDAC, MCE: Enable MCE decoding on F12h EDAC, MCE: Add F12h NB MCE decoder EDAC, MCE: Add F12h IC MCE decoder EDAC, MCE: Add F12h DC MCE decoder EDAC, MCE: Add support for F11h MCEs EDAC, MCE: Enable MCE decoding on F14h EDAC, MCE: Fix FR MCEs decoding EDAC, MCE: Complete NB MCE decoders EDAC, MCE: Warn about LS MCEs on F14h EDAC, MCE: Adjust IC decoders to F14h EDAC, MCE: Adjust DC decoders to F14h EDAC, MCE: Rename files EDAC, MCE: Rework MCE injection EDAC: Export edac sysfs class to users. EDAC, MCE: Pass complete MCE info to decoders EDAC, MCE: Sanitize error codes EDAC, MCE: Remove unused function parameter EDAC, MCE: Add HW_ERR prefix ...
2010-10-21Merge branch 'x86-amd-nb-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-amd-nb-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, amd_nb: Enable GART support for AMD family 0x15 CPUs x86, amd: Use compute unit information to determine thread siblings x86, amd: Extract compute unit information for AMD CPUs x86, amd: Add support for CPUID topology extension of AMD CPUs x86, nmi: Support NMI watchdog on newer AMD CPU families x86, mtrr: Assume SYS_CFG[Tom2ForceMemTypeWB] exists on all future AMD CPUs x86, k8: Rename k8.[ch] to amd_nb.[ch] and CONFIG_K8_NB to CONFIG_AMD_NB x86, k8-gart: Decouple handling of garts and northbridges x86, cacheinfo: Fix dependency of AMD L3 CID x86, kvm: add new AMD SVM feature bits x86, cpu: Fix allowed CPUID bits for KVM guests x86, cpu: Update AMD CPUID feature bits x86, cpu: Fix renamed, not-yet-shipping AMD CPUID feature bit x86, AMD: Remove needless CPU family check (for L3 cache info) x86, tsc: Remove CPU frequency calibration on AMD
2010-10-21EDAC, MCE: Fix shift warning on 32-bitBorislav Petkov
Fix drivers/edac/mce_amd.c:262: warning: left shift count >= width of type on 32-bit builds. Reported-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Add a BIT_64() macroBorislav Petkov
Add a macro for 64-bit vectors to use when accessing MSR contents. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Enable MCE decoding on F12hBorislav Petkov
Turn on MCE decoding on F12h. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Add F12h NB MCE decoderBorislav Petkov
F12h is completely covered by the generic path. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Add F12h IC MCE decoderBorislav Petkov
... which is the same as for K8 and F10h. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Add F12h DC MCE decoderBorislav Petkov
F12h DC MCE signatures are a subset of F10h's so reuse them. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Add support for F11h MCEsBorislav Petkov
F11h has almost the same MCE signatures as K8 except DRAM ECC and MC5 bank errors. Reuse functionality from the other families. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Enable MCE decoding on F14hBorislav Petkov
Now that all decoders have been taught about F14h, models < 0x10 MCEs, enable decoding on this family of CPUs. Also, issue a short informational message upon boot that MCE decoding gets enabled. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Fix FR MCEs decodingBorislav Petkov
Those are N/A on K8, so don't decode them there. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Complete NB MCE decodersBorislav Petkov
Add support for decoding F14h BU MCEs and improve decoding of the remaining families. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Warn about LS MCEs on F14hBorislav Petkov
F14h CPUs do not generate LS MCEs so exit early and warn the user in case this path is ever hit that something else might be going haywire. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Adjust IC decoders to F14hBorislav Petkov
Add support for IC MCEs for F14h CPUs. K8 and F10h are almost identical so use one function for both. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Adjust DC decoders to F14hBorislav Petkov
Add a per-family data cache decoders. Since there is a certain overlap between the different DC MCE signatures, reuse functionality between the families as far as possible. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Rename filesBorislav Petkov
Drop "edac_" string from the filenames since they're prefixed with edac/ in their pathname anyway. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Rework MCE injectionBorislav Petkov
Add sysfs injection facilities for testing of the MCE decoding code. Remove large parts of amd64_edac_dbg.c, as a result, which did only NB MCE injection anyway and the new injection code supports that functionality already. Add an injection module so that MCE decoding code in production kernels like those in RHEL and SLES can be tested. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC: Export edac sysfs class to users.Borislav Petkov
Move toplevel sysfs class to the stub and make it available to non-modularized code too. Add proper refcounting of its users and move the registration functionality into the reference counting routines. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Pass complete MCE info to decodersBorislav Petkov
... instead of the MCi_STATUS info only for improved handling of certain types of errors later. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Sanitize error codesBorislav Petkov
Clean up error codes names, shorten to mnemonics, add RRRR boundary checking. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Remove unused function parameterBorislav Petkov
Remove remains from previous functionality. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC, MCE: Add HW_ERR prefixBorislav Petkov
.. so that the user knows what she's looking at there in dmesg. Also, fix a minor cosmetic output inconsistency. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-21EDAC: Fix error returnBorislav Petkov
We should return a negative value when we cannot get the toplevel edac sysfs class. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-10-18Update broken web addresses in the kernel.Justin P. Mattock
The patch below updates broken web addresses in the kernel Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Finn Thain <fthain@telegraphics.com.au> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Matt Turner <mattst88@gmail.com> Cc: Dimitry Torokhov <dmitry.torokhov@gmail.com> Cc: Mike Frysinger <vapier.adi@gmail.com> Acked-by: Ben Pfaff <blp@cs.stanford.edu> Acked-by: Hans J. Koch <hjk@linutronix.de> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-10-01i7core_edac: fix panic in udimm sysfs attributes registrationMarcin Slusarz
Array of udimm sysfs attributes was not ended with NULL marker, leading to dereference of random memory. EDAC DEBUG: edac_create_mci_instance_attributes: edac_create_mci_instance_attributes() file udimm0 EDAC DEBUG: edac_create_mci_instance_attributes: edac_create_mci_instance_attributes() file udimm1 EDAC DEBUG: edac_create_mci_instance_attributes: edac_create_mci_instance_attributes() file udimm2 BUG: unable to handle kernel NULL pointer dereference at 00000000000001a4 IP: [<ffffffff81330b36>] edac_create_mci_instance_attributes+0x148/0x1f1 Pid: 1, comm: swapper Not tainted 2.6.36-rc3-nv+ #483 P6T SE/System Product Name RIP: 0010:[<ffffffff81330b36>] [<ffffffff81330b36>] edac_create_mci_instance_attributes+0x148/0x1f1 (...) Call Trace: [<ffffffff81330b86>] edac_create_mci_instance_attributes+0x198/0x1f1 [<ffffffff81330c9a>] edac_create_sysfs_mci_device+0xbb/0x2b2 [<ffffffff8132f533>] edac_mc_add_mc+0x46b/0x557 [<ffffffff81428901>] i7core_probe+0xccf/0xec0 RIP [<ffffffff81330b36>] edac_create_mci_instance_attributes+0x148/0x1f1 ---[ end trace 20de320855b81d78 ]--- Kernel panic - not syncing: Attempted to kill init! Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Cc: Mauro Carvalho Chehab <mchehab@redhat.com> Acked-by: Doug Thompson <dougthompson@xmission.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-27amd64_edac: Fix driver module removalBorislav Petkov
f4347553b30ec66530bfe63c84530afea3803396 removed the edac polling mechanism in favor of using a notifier chain for conveying MCE information to edac. However, the module removal path didn't test whether the driver had setup the polling function workqueue at all and the rmmod process was hanging in the kernel at try_to_del_timer_sync() in the cancel_delayed_work() path, trying to cancel an uninitialized work struct. Fix that by adding a balancing check to the workqueue removal path. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2010-09-24i7300_edac: Properly initialize per-csrow memory sizeMauro Carvalho Chehab
Due to the current edac-core limits, we cannot represent a per-channel memory size, for FB-DIMM drivers. So, we need to sum-up all values for each slot, in order to properly represent the total amount of memory found by the i7300 driver. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-09-24V4L/DVB: i7300_edac: better initialize page countsMauro Carvalho Chehab
It is still somewhat fake, as the pages may not be on this exact order, and may even be used in mirror mode, but this is a best guess than the other random fake values. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-09-20x86, k8: Rename k8.[ch] to amd_nb.[ch] and CONFIG_K8_NB to CONFIG_AMD_NBAndreas Herrmann
The file names are somehow misleading as the code is not specific to AMD K8 CPUs anymore. The files accomodate code for other AMD CPU northbridges as well. Same is true for the config option which is valid for AMD CPU northbridges in general and not specific to K8. Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> LKML-Reference: <20100917160343.GD4958@loge.amd.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-09-17x86, k8-gart: Decouple handling of garts and northbridgesAndreas Herrmann
So far we only provide num_k8_northbridges. This is required in different areas (e.g. L3 cache index disable, GART). But not all AMD CPUs provide a GART. Thus it is useful to split off the GART handling from the generic caching of AMD northbridge misc devices. Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> LKML-Reference: <20100917160254.GC4958@loge.amd.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-08-30i7300-edac: CodingStyle cleanupMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-30i7300_edac: Improve commentsMauro Carvalho Chehab
This is basically a cleanup patch, improving the comments for each function. While here, do a few cleanups. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-30i7300_edac: Cleanup: reorganize the file contentsMauro Carvalho Chehab
This change should do no functional change. It just rearranges the contents of the c file, in order to make easier to understand and maintain it. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-30i7300_edac: Properly detect channel on CE errorsMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-30i7300_edac: enrich FBD error info for corrected errorsMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-30i7300_edac: enrich FBD error info for fatal errorsMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-30i7300_edac: pre-allocate a buffer used to prepare err messagesMauro Carvalho Chehab
Instead of dynamically allocating a buffer for it where needed, just allocate it once. As we'll use the same buffer also during fatal and non-fatal errors, is is very risky to dynamically allocate it during an error. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-30i7300_edac: Fix MTR x4/x8 detection logicMauro Carvalho Chehab
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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