When executing on an ACPI Hardware Reduced hardware, all the ACPI tables are not exposed in sysfs due to the fact that FACS is silently ignored by the kernel in the ACPI hardware reduced mode and, moreover, the acpi_tables_sysfs_init() ACPI table walk is buggy and stops too soon. The acpi_tables_sysfs_init() function should rely on the acpi_status return value from acpi_get_table_by_index() to decide whether or not to stop the iteration (the walk should only be terminated when that value is AE_BAD_PARAMETER). This way, when running in an ACPI Harware Reduced environment (where the FACS table is silently ignored by the kernel) or if some ACPI tables are not correctly memory mapped or have bad checksums, it will still walk through the remaining tables that may be correct. [rjw: Changelog] Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Currently, each of the ACPI tables exported from /sys/firmware/acpi/tables is of zero size: $ LANG=C ls -ld /sys/firmware/acpi/tables/* -r-------- 1 root root 0 Nov 19 09:48 /sys/firmware/acpi/tables/APIC -r-------- 1 root root 0 Nov 19 09:48 /sys/firmware/acpi/tables/BOOT -r-------- 1 root root 0 Nov 19 14:25 /sys/firmware/acpi/tables/DSDT -r-------- 1 root root 0 Nov 19 14:25 /sys/firmware/acpi/tables/FACP -r-------- 1 root root 0 Nov 19 14:25 /sys/firmware/acpi/tables/FACS -r-------- 1 root root 0 Nov 19 14:25 /sys/firmware/acpi/tables/MCFG -r-------- 1 root root 0 Nov 19 14:25 /sys/firmware/acpi/tables/SRAT drwxr-xr-x 2 root root 0 Nov 19 09:48 /sys/firmware/acpi/tables/dynamic/ due to which, user-land tools fail reading each table. For example: $ acpidump -f /sys/firmware/acpi/tables/SRAT Could not get input file size: /sys/firmware/acpi/tables/SRAT To deal with the issue, this patch assigns size of each ACPI table to the corresponding sysfs file. $ LANG=C ls -hld /sys/firmware/acpi/tables/* -r-------- 1 root root 94 Nov 19 16:45 /sys/firmware/acpi/tables/APIC -r-------- 1 root root 40 Nov 19 16:45 /sys/firmware/acpi/tables/BOOT -r-------- 1 root root 58K Nov 19 16:55 /sys/firmware/acpi/tables/DSDT -r-------- 1 root root 244 Nov 19 16:55 /sys/firmware/acpi/tables/FACP -r-------- 1 root root 64 Nov 19 16:55 /sys/firmware/acpi/tables/FACS -r-------- 1 root root 60 Nov 19 16:55 /sys/firmware/acpi/tables/MCFG -r-------- 1 root root 168 Nov 19 16:45 /sys/firmware/acpi/tables/SRAT drwxr-xr-x 2 root root 0 Nov 19 16:55 /sys/firmware/acpi/tables/dynamic/ Then, user-land tools work well like: $ acpidump -f /sys/firmware/acpi/tables/SRAT SRAT @ 0x0000000000000000 0000: 53 52 41 54 A8 00 00 00 02 65 56 4D 57 41 52 45 SRAT.....eVMWARE 0010: 4D 45 4D 50 4C 55 47 20 00 00 04 06 56 4D 57 20 MEMPLUG ....VMW 0020: 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................ 0030: 01 28 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .(.............. 0040: 00 00 0A 00 00 00 00 00 00 00 00 00 01 00 00 00 ................ 0050: 00 00 00 00 00 00 00 00 01 28 00 00 00 00 00 00 .........(...... 0060: 00 00 10 00 00 00 00 00 00 00 F0 BF 00 00 00 00 ................ 0070: 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................ 0080: 01 28 00 00 00 00 00 00 00 00 00 00 01 00 00 00 .(.............. 0090: 00 00 00 40 00 00 00 00 00 00 00 00 01 00 00 00 ...@............ 00A0: 00 00 00 00 00 00 00 00 ........ Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Acked-by: Toshi Kani <toshi.kani@hp.com> Acked-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* acpi-assorted: ACPI: Add Toshiba NB100 to Vista _OSI blacklist ACPI / osl: remove an unneeded NULL check ACPI / platform: add ACPI ID for a Broadcom GPS chip ACPI: improve acpi_extract_package() utility ACPI / LPSS: fix UART Auto Flow Control ACPI / platform: Add ACPI IDs for Intel SST audio device x86 / ACPI: fix incorrect placement of __initdata tag ACPI / thermal: convert printk(LEVEL...) to pr_<lvl> ACPI / sysfs: make GPE sysfs attributes only accept correct values ACPI / EC: Convert all printk() calls to dynamic debug function ACPI / button: Using input_set_capability() to mark device's event capability ACPI / osl: implement acpi_os_sleep() with msleep()
Use kobject_init_and_add() since we have nothing special to do between kobject_init() and kobject_add(). Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
kobject_add() sets the parent pointer, so we don't need to do it explicitly. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Set the kobject name via kobject_add() instead of using kobject_set_name(), which is deprecated per Documentation/kobject.txt. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
According to the design, GPE sysfs attributes should accept "disable", "enable", "clear" and integer numbers as params. Current code checks "disable", "enable" and "clear" first. If the param doesn't match, pass it to strtoul() as a string representing an integer number and assign the return value to the given GPE count. It is missing the check of whether or not the param really represents an integer number and strtoul() will return 0 if the string is not a number. This causes any params except for "enable", "disable", "clear" and a number to make the GPE count become 0. This patch is to use kstrtoul() to replace strtoul() and check the return value. If the convertion is successful, use as the new GPE count. If not, return an error. Signed-off-by: Lan Tianyu <tianyu.lan@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Merge first patch-bomb from Andrew Morton: - various misc bits - I'm been patchmonkeying ocfs2 for a while, as Joel and Mark have been distracted. There has been quite a bit of activity. - About half the MM queue - Some backlight bits - Various lib/ updates - checkpatch updates - zillions more little rtc patches - ptrace - signals - exec - procfs - rapidio - nbd - aoe - pps - memstick - tools/testing/selftests updates * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (445 commits) tools/testing/selftests: don't assume the x bit is set on scripts selftests: add .gitignore for kcmp selftests: fix clean target in kcmp Makefile selftests: add .gitignore for vm selftests: add hugetlbfstest self-test: fix make clean selftests: exit 1 on failure kernel/resource.c: remove the unneeded assignment in function __find_resource aio: fix wrong comment in aio_complete() drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test mode drivers/memstick/host/r592.c: convert to module_pci_driver drivers/memstick/host/jmb38x_ms: convert to module_pci_driver pps-gpio: add device-tree binding and support drivers/pps/clients/pps-gpio.c: convert to module_platform_driver drivers/pps/clients/pps-gpio.c: convert to devm_* helpers drivers/parport/share.c: use kzalloc Documentation/accounting/getdelays.c: avoid strncpy in accounting tool aoe: update internal version number to v83 aoe: update copyright date aoe: perform I/O completions in parallel ...
Fix various weird constructions of strncpy(dst, src, strlen(src)). Length limits should be about the space available in the destination, not repurposed as a method to either always include or always exclude a trailing NULL byte. Either the NULL should always be copied (using strlcpy), or it should not be copied (using something like memcpy). Readable code should not depend on the weird behavior of strncpy when it hits the length limit. Better to avoid the anti-pattern entirely. [akpm@linux-foundation.org: revert getdelays.c part due to missing bsd/string.h] Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> [staging] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> [acpi] Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ursula Braun <ursula.braun@de.ibm.com> Cc: Frank Blaschka <blaschka@linux.vnet.ibm.com> Cc: Richard Weinberger <richard@nod.at> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Modify the generic ACPI hotplug code to be able to check if devices scheduled for hot-removal may be gracefully removed from the system using the device offline/online mechanism introduced previously. Namely, make acpi_scan_hot_remove() handling device hot-removal call device_offline() for all physical companions of the ACPI device nodes involved in the operation and check the results. If any of the device_offline() calls fails, the function will not progress to the removal phase (which cannot be aborted), unless its (new) force argument is set (in case of a failing offline it will put the devices offlined by it back online). In support of 'forced' device hot-removal, add a new sysfs attribute 'force_remove' that will reside under /sys/firmware/acpi/hotplug/. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Toshi Kani <toshi.kani@hp.com>