linux-stable.git/drivers/uio, branch linux-3.10.y

uio: fix dmem_region_start computation

2017-02-10T10:04:03+00:00

commit 4d31a2588ae37a5d0f61f4d956454e9504846aeb upstream.

The variable i contains a total number of resources (including
IORESOURCE_IRQ). However, we want the dmem_region_start to point
after the last resource of type IORESOURCE_MEM. The original behaviour
leads (very likely) to skipping several UIO mapping regions and makes
them useless. Fix this by computing dmem_region_start from the uiomem
which points to the last used UIO mapping.

Fixes: 0a0c3b5a24bd ("Add new uio device for dynamic memory allocation")

Signed-off-by: Jan Viktorin 
Signed-off-by: Willy Tarreau

Fix a few incorrectly checked [io_]remap_pfn_range() calls

2013-11-13T03:05:33+00:00

commit 7314e613d5ff9f0934f7a0f74ed7973b903315d1 upstream.

Nico Golde reports a few straggling uses of [io_]remap_pfn_range() that
really should use the vm_iomap_memory() helper.  This trivially converts
two of them to the helper, and comments about why the third one really
needs to continue to use remap_pfn_range(), and adds the missing size
check.

Reported-by: Nico Golde 
Signed-off-by: Linus Torvalds

uio: provide vm access to UIO_MEM_PHYS maps

2013-11-13T03:05:33+00:00

commit 7294151d0592e0ff48c61fca9fd7c93d613134da upstream.

This makes it possible to let gdb access mappings of the process that is
being debugged.

uio_mmap_logical was moved and uio_vm_ops renamed to group related code
and differentiate to new stuff.

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Greg Kroah-Hartman

uio: UIO_DMEM_GENIRQ should depend on HAS_DMA

2013-05-21T17:13:23+00:00

If NO_DMA=y:

drivers/built-in.o: In function `uio_dmem_genirq_release':
drivers/uio/uio_dmem_genirq.c:95: undefined reference to `dma_free_coherent'
drivers/built-in.o: In function `uio_dmem_genirq_open':
drivers/uio/uio_dmem_genirq.c:61: undefined reference to `dma_alloc_coherent'

Signed-off-by: Geert Uytterhoeven 
Cc: Hans J. Koch 
Cc: Greg Kroah-Hartman 
Signed-off-by: Greg Kroah-Hartman

drivers: uio: Fix UIO device registration failure

2013-03-29T16:08:22+00:00

Until recently uio_get_minor() returned 0 for success and
a negative value on failure.  This became non-negative for suceess and
negative for failure.  Restore the original return value spec so that we can
successfully initialize UIO devices with a non-zero minor device
number.

Cc: "Hans J. Koch" 
Signed-off-by: Damian Hobson-Garcia 
Signed-off-by: Greg Kroah-Hartman

uio: convert to idr_alloc()

2013-02-28T03:10:19+00:00

Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo 
Acked-by: Greg Kroah-Hartman 
Cc: "Hans J. Koch" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

uio: remove !S390 dependency from Kconfig

2013-02-14T14:55:18+00:00

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

Merge tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2012-12-12T20:05:15+00:00

Pull ARM SoC updates from Olof Johansson:
 "This contains the bulk of new SoC development for this merge window.

  Two new platforms have been added, the sunxi platforms (Allwinner A1x
  SoCs) by Maxime Ripard, and a generic Broadcom platform for a new
  series of ARMv7 platforms from them, where the hope is that we can
  keep the platform code generic enough to have them all share one mach
  directory.  The new Broadcom platform is contributed by Christian
  Daudt.

  Highbank has grown support for Calxeda's next generation of hardware,
  ECX-2000.

  clps711x has seen a lot of cleanup from Alexander Shiyan, and he's
  also taken on maintainership of the platform.

  Beyond this there has been a bunch of work from a number of people on
  converting more platforms to IRQ domains, pinctrl conversion, cleanup
  and general feature enablement across most of the active platforms."

Fix up trivial conflicts as per Olof.

* tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (174 commits)
  mfd: vexpress-sysreg: Remove LEDs code
  irqchip: irq-sunxi: Add terminating entry for sunxi_irq_dt_ids
  clocksource: sunxi_timer: Add terminating entry for sunxi_timer_dt_ids
  irq: versatile: delete dangling variable
  ARM: sunxi: add missing include for mdelay()
  ARM: EXYNOS: Avoid early use of of_machine_is_compatible()
  ARM: dts: add node for PL330 MDMA1 controller for exynos4
  ARM: EXYNOS: Add support for secondary CPU bring-up on Exynos4412
  ARM: EXYNOS: add UART3 to DEBUG_LL ports
  ARM: S3C24XX: Add clkdev entry for camif-upll clock
  ARM: SAMSUNG: Add s3c24xx/s3c64xx CAMIF GPIO setup helpers
  ARM: sunxi: Add missing sun4i.dtsi file
  pinctrl: samsung: Do not initialise statics to 0
  ARM i.MX6: remove gate_mask from pllv3
  ARM i.MX6: Fix ethernet PLL clocks
  ARM i.MX6: rename PLLs according to datasheet
  ARM i.MX6: Add pwm support
  ARM i.MX51: Add pwm support
  ARM i.MX53: Add pwm support
  ARM: mx5: Replace clk_register_clkdev with clock DT lookup
  ...

drivers: uio: Only allocate new private data when probing device tree node

2012-11-21T21:44:10+00:00

The same condition should be used both when allocating and freeing the
driver private data.  When dev.of_node is non NULL, allocate a new
private data structure, otherwise use the values from the platform data.

Reported-by: Fengguang Wu 
Signed-off-by: Damian Hobson-Garcia 
Cc: "Hans J. Koch" 
Signed-off-by: Greg Kroah-Hartman

drivers: uio_dmem_genirq: Allow partial success when opening device

2012-11-21T21:44:10+00:00

The uio device should not fail on open just because one memory allocation
fails. The device might export several regions, the failure of some of
which may or may not be a problem for the user space driver.  Failing
regions will remain unmapped, and successful regions will be mapped and
exported to user space.  Also deals with the case where failing to map
a region after successfully allocating others would not unmap the
successfully allocated regions before dying.

Signed-off-by: Damian Hobson-Garcia 
Cc: "Hans J. Koch" 
Signed-off-by: Greg Kroah-Hartman