user/sven/linux.git/drivers/pnp, branch v3.2.97

pnpacpi: fix incorrect TEST_ALPHA() test

2013-01-03T03:33:30Z

commit cdc87c5a30f407ed1ce43d8a22261116873d5ef1 upstream. TEST_ALPHA() is broken and always returns 0. [akpm@linux-foundation.org: return false for '@' as well, per Bjorn] Signed-off-by: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Rafael J. Wysocki Signed-off-by: Ben Hutchings

ACPI / PNP: Do not crash due to stale pointer use during system resume

2013-01-03T03:33:23Z

commit a6b5e88c0e42093b9057856f35770966c8c591e3 upstream. During resume from system suspend the 'data' field of struct pnp_dev in pnpacpi_set_resources() may be a stale pointer, due to removal of the associated ACPI device node object in the previous suspend-resume cycle. This happens, for example, if a dockable machine is booted in the docking station and then suspended and resumed and suspended again. If that happens, pnpacpi_build_resource_template() called from pnpacpi_set_resources() attempts to use that pointer and crashes. However, pnpacpi_set_resources() actually checks the device's ACPI handle, attempts to find the ACPI device node object attached to it and returns an error code if that fails, so in fact it knows what the correct value of dev->data should be. Use this observation to update dev->data with the correct value if necessary and dump a call trace if that's the case (once). We still need to fix the root cause of this issue, but preventing systems from crashing because of it is an improvement too. Reported-and-tested-by: Zdenek Kabelac References: https://bugzilla.kernel.org/show_bug.cgi?id=51071 Signed-off-by: Rafael J. Wysocki Signed-off-by: Ben Hutchings

PNPACPI: Fix device ref leaking in acpi_pnp_match

2012-04-13T15:33:46Z

commit 89e96ada572fb216e582dbe3f64e1a6939a37f74 upstream. During testing pci root bus removal, found some root bus bridge is not freed. If booting with pnpacpi=off, those hostbridge could be freed without problem. It turns out that some devices reference are not released during acpi_pnp_match. that match should not hold one device ref during every calling. Add pu_device calling before returning. Signed-off-by: Yinghai Lu Signed-off-by: Len Brown Signed-off-by: Greg Kroah-Hartman

PNP: work around Dell 1536/1546 BIOS MMCONFIG bug that breaks USB

2012-01-26T00:13:21Z

commit eb31aae8cb5eb54e234ed2d857ddac868195d911 upstream. Some Dell BIOSes have MCFG tables that don't report the entire MMCONFIG area claimed by the chipset. If we move PCI devices into that claimed-but-unreported area, they don't work. This quirk reads the AMD MMCONFIG MSRs and adds PNP0C01 resources as needed to cover the entire area. Example problem scenario: BIOS-e820: 00000000cfec5400 - 00000000d4000000 (reserved) Fam 10h mmconf [d0000000, dfffffff] PCI: MMCONFIG for domain 0000 [bus 00-3f] at [mem 0xd0000000-0xd3ffffff] (base 0xd0000000) pnp 00:0c: [mem 0xd0000000-0xd3ffffff] pci 0000:00:12.0: reg 10: [mem 0xffb00000-0xffb00fff] pci 0000:00:12.0: no compatible bridge window for [mem 0xffb00000-0xffb00fff] pci 0000:00:12.0: BAR 0: assigned [mem 0xd4000000-0xd40000ff] Reported-by: Lisa Salimbas Reported-by: Tested-by: dann frazier References: https://bugzilla.kernel.org/show_bug.cgi?id=31602 References: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/647043 References: https://bugzilla.redhat.com/show_bug.cgi?id=770308 Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes Signed-off-by: Greg Kroah-Hartman

Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux

2011-11-07T18:13:52Z

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: cpuidle: Single/Global registration of idle states cpuidle: Split cpuidle_state structure and move per-cpu statistics fields cpuidle: Remove CPUIDLE_FLAG_IGNORE and dev->prepare() cpuidle: Move dev->last_residency update to driver enter routine; remove dev->last_state ACPI: Fix CONFIG_ACPI_DOCK=n compiler warning ACPI: Export FADT pm_profile integer value to userspace thermal: Prevent polling from happening during system suspend ACPI: Drop ACPI_NO_HARDWARE_INIT ACPI atomicio: Convert width in bits to bytes in __acpi_ioremap_fast() PNPACPI: Simplify disabled resource registration ACPI: Fix possible recursive locking in hwregs.c ACPI: use kstrdup() mrst pmu: update comment tools/power turbostat: less verbose debugging

PNPACPI: Simplify disabled resource registration

2011-11-07T01:13:55Z

The attached patch simplifies 29df8d8f8702f0f53c1375015f09f04bc8d023c1. As the "pnp_xxx" structs are not designed to cope with IORESOURCE_DISABLED, and hence no code can test for this value, setting this value is actually a "no op" and can be skipped altogether. It is sufficient to remove the checks for "empty" resources and continue processing. The patch is applied against 3.1. Signed-off-by: Witold Szczeponik Acked-by: Bjorn Helgaas Signed-off-by: Len Brown

pnp: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required

2011-10-31T23:32:21Z

These macros are no longer in module.h and module.h is no longer present everywhere. Call out export.h for the users who are making use of these macros. Signed-off-by: Paul Gortmaker

Merge 'akpm' patch series

2011-07-26T04:00:19Z

* Merge akpm patch series: (122 commits) drivers/connector/cn_proc.c: remove unused local Documentation/SubmitChecklist: add RCU debug config options reiserfs: use hweight_long() reiserfs: use proper little-endian bitops pnpacpi: register disabled resources drivers/rtc/rtc-tegra.c: properly initialize spinlock drivers/rtc/rtc-twl.c: check return value of twl_rtc_write_u8() in twl_rtc_set_time() drivers/rtc: add support for Qualcomm PMIC8xxx RTC drivers/rtc/rtc-s3c.c: support clock gating drivers/rtc/rtc-mpc5121.c: add support for RTC on MPC5200 init: skip calibration delay if previously done misc/eeprom: add eeprom access driver for digsy_mtc board misc/eeprom: add driver for microwire 93xx46 EEPROMs checkpatch.pl: update $logFunctions checkpatch: make utf-8 test --strict checkpatch.pl: add ability to ignore various messages checkpatch: add a "prefer __aligned" check checkpatch: validate signature styles and To: and Cc: lines checkpatch: add __rcu as a sparse modifier checkpatch: suggest using min_t or max_t ... Did this as a merge because of (trivial) conflicts in - Documentation/feature-removal-schedule.txt - arch/xtensa/include/asm/uaccess.h that were just easier to fix up in the merge than in the patch series.

pnpacpi: register disabled resources

2011-07-26T03:57:17Z

When parsing PnP ACPI resource structures, it may happen that some of the resources are disabled (in which case "the size" of the resource equals zero). The current solution is to skip these resources completely - with the unfortunate side effect that they are not registered despite the fact that they exist, after all. (The downside of this approach is that these resources cannot be used as templates for setting the actual device's resources because they are missing from the template.) The kernel's APM implementation does not suffer from this problem and registers all resources regardless of "their size". This patch fixes a problem with (at least) the vintage IBM ThinkPad 600E (and most likely also with the 600, 600X, and 770X which have a very similar layout) where some of its PnP devices support options where either an IRQ, a DMA, or an IO port is disabled. Without this patch, the devices can not be configured using the "/sys/bus/pnp/devices/*/resources" interface. The manipulation of these resources is important because the 600E has very demanding requirements. For instance, the number of IRQs is not sufficient to support all devices of the 600E. Fortunately, some of the devices, like the sound card's MPU-401 UART, can be configured to not use any IRQ, hence freeing an IRQ for a device that requires one. (Still, the device's "ResourceTemplate" requires an IRQ resource descriptor which cannot be created if the resource has not been registered in the first place.) As an example, the dependent sets of the 600E's CSC0103 device (the MPU-401 UART) are listed, with the patch applied, as: Dependent: 00 - Priority preferred port 0x300-0x330, align 0xf, size 0x4, 16-bit address decoding irq High-Edge Dependent: 01 - Priority acceptable port 0x300-0x330, align 0xf, size 0x4, 16-bit address decoding irq 5,7,2/9,10,11,15 High-Edge (The same result is obtained when PNPBIOS is used instead of PnP ACPI.) Without the patch, the IRQ resource in the preferred option is not listed at all: Dependent: 00 - Priority preferred port 0x300-0x330, align 0xf, size 0x4, 16-bit address decoding Dependent: 01 - Priority acceptable port 0x300-0x330, align 0xf, size 0x4, 16-bit address decoding irq 5,7,2/9,10,11,15 High-Edge And in fact, the 600E's DSDT lists the disabled IRQ as an option, as can be seen from the following excerpt from the DSDT: Name (_PRS, ResourceTemplate () { StartDependentFn (0x00, 0x00) { IO (Decode16, 0x0300, 0x0330, 0x10, 0x04) IRQNoFlags () {} } StartDependentFn (0x01, 0x00) { IO (Decode16, 0x0300, 0x0330, 0x10, 0x04) IRQNoFlags () {5,7,9,10,11,15} } EndDependentFn () }) With this patch applied, a user space program - or maybe even the kernel - can allocate all devices' resources optimally. For the 600E, this means to find optimal resources for (at least) the serial port, the parallel port, the infrared port, the MWAVE modem, the sound card, and the MPU-401 UART. The patch applies the idea to register disabled resources to all types of resources, not just to IRQs, DMAs, and IO ports. At the same time, it mimics the behavior of the "pnp_assign_xxx" functions from "drivers/pnp/manager.c" where resources with "no size" are considered disabled. No regressions were observed on hardware that does not require this patch. The patch is applied against 2.6.39. NB: The kernel's current PnP interface does not allow for disabling individual resources using the "/sys/bus/pnp/devices/$device/resources" file. Assuming this could be done, a device could be configured to use a disabled resource using a simple series of calls: echo disable > /sys/bus/pnp/devices/$device/resources echo clear > /sys/bus/pnp/devices/$device/resources echo set irq disabled > /sys/bus/pnp/devices/$device/resources echo fill > /sys/bus/pnp/devices/$device/resources echo activate > /sys/bus/pnp/devices/$device/resources This patch addresses only the parsing of PnP ACPI devices. ChangeLog (v1 -> v2): - extend patch description - fix typo in patch itself Signed-off-by: Witold Szczeponik Cc: Len Brown Cc: Adam Belay Cc: Bjorn Helgaas Cc: Bjorn Helgaas Cc: Henrique de Moraes Holschuh Cc: Matthew Garrett Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

treewide: Convert uses of struct resource to resource_size(ptr)

2011-06-10T12:55:36Z

Several fixes as well where the +1 was missing. Done via coccinelle scripts like: @@ struct resource *ptr; @@ - ptr->end - ptr->start + 1 + resource_size(ptr) and some grep and typing. Mostly uncompiled, no cross-compilers. Signed-off-by: Joe Perches Signed-off-by: Jiri Kosina