Thierry Reding 75096579c3 lib: devres: Introduce devm_ioremap_resource() ... The devm_request_and_ioremap() function is very useful and helps avoid a whole lot of boilerplate. However, one issue that keeps popping up is its lack of a specific error code to determine which of the steps that it performs failed. Furthermore, while the function gives an example and suggests what error code to return on failure, a wide variety of error codes are used throughout the tree. In an attempt to fix these problems, this patch adds a new function that drivers can transition to. The devm_ioremap_resource() returns a pointer to the remapped I/O memory on success or an ERR_PTR() encoded error code on failure. Callers can check for failure using IS_ERR() and determine its cause by extracting the error code using PTR_ERR(). devm_request_and_ioremap() is implemented as a wrapper around the new API and return NULL on failure as before. This ensures that backwards compatibility is maintained until all users have been converted to the new API, at which point the old devm_request_and_ioremap() function should be removed. A semantic patch is included which can be used to convert from the old devm_request_and_ioremap() API to the new devm_ioremap_resource() API. Some non-trivial cases may require manual intervention, though. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Cc: Arnd Bergmann <arnd@arndb.de> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2013-01-22 09:41:43 -08:00
..
ABI	Merge branch 'akpm' (Andrew's patch-bomb)	2012-12-20 20:00:43 -08:00
accounting	doc: Remove unnecessary declarations from Documentation/accounting/getdelays.c	2012-11-26 14:22:21 +01:00
acpi	Documentation: remove __dev* attributes.	2013-01-03 15:57:16 -08:00
aoe	aoe: allow user to disable target failure timeout	2012-12-17 17:15:25 -08:00
arm	fbdev changes for 3.8:	2012-12-15 13:03:48 -08:00
arm64	Documentation: Fixes a word in Documentation/arm64/memory.txt	2012-11-29 16:33:18 +00:00
auxdisplay
backlight	drivers/video/backlight/lp855x_bl.c: use generic PWM functions	2012-12-17 17:15:16 -08:00
blackfin
block
blockdev
bus-devices	ARM: OMAP2+: gpmc: generic timing calculation	2012-11-09 18:07:11 +05:30
cdrom
cgroups	kmem: add slab-specific documentation about the kmem controller	2012-12-18 15:02:15 -08:00
connector
console
cpu-freq
cpuidle
cris
crypto	KEYS: Document asymmetric key type	2012-10-08 13:50:12 +10:30
development-process
device-mapper	DM RAID: Add rebuild capability for RAID10	2012-10-11 13:40:24 +11:00
devicetree	ARM: arm-soc fixes for 3.8-rc	2013-01-08 18:53:56 -08:00
DocBook	Documentation: remove depends on CONFIG_EXPERIMENTAL	2013-01-11 11:38:03 -08:00
driver-model	lib: devres: Introduce devm_ioremap_resource()	2013-01-22 09:41:43 -08:00
dvb
early-userspace
EDID
extcon
fault-injection	doc: fix quite a few typos within Documentation	2012-11-19 14:28:24 +01:00
fb
filesystems	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-12-20 18:14:31 -08:00
firmware_class	firmware loader: document firmware cache mechanism	2012-11-14 15:07:18 -08:00
frv
hid	doc: fix quite a few typos within Documentation	2012-11-19 14:28:24 +01:00
hwmon	hwmon: (it87) Report thermal sensor type as Intel PECI if appropriate	2012-12-19 22:17:02 +01:00
i2c	Documentation: remove __dev* attributes.	2013-01-03 15:57:16 -08:00
i2o
ia64
ide
infiniband
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2012-12-13 12:00:48 -08:00
ioctl
isdn
ja_JP
kbuild	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-12-13 12:00:02 -08:00
kdump
ko_KR
laptops	Documentation/laptops: remove depends on CONFIG_EXPERIMENTAL	2013-01-21 14:52:42 -08:00
leds
m68k
make
memory-devices
mips
misc-devices	doc: fix quite a few typos within Documentation	2012-11-19 14:28:24 +01:00
mmc	mmc: core: Extend sysfs to ext_csd parameters for RPMB support	2012-12-06 13:54:48 -05:00
mn10300
mtd
namespaces
netlabel
networking	ip-sysctl: fix spelling errors	2013-01-04 15:12:34 -08:00
nfc
parisc
PCI	Documentation: remove __dev* attributes.	2013-01-03 15:57:16 -08:00
pcmcia
power	PM: Move disabling/enabling runtime PM to late suspend/early resume	2013-01-06 00:35:55 +01:00
powerpc	powerpc/hw-breakpoint: Use generic hw-breakpoint interfaces for new PPC ptrace flags	2012-11-15 13:00:23 +11:00
pps
prctl
pti
ptp
rapidio
RCU	Merge branches 'urgent.2012.10.27a', 'doc.2012.11.16a', 'fixes.2012.11.13a', 'srcu.2012.10.27a', 'stall.2012.11.13a', 'tracing.2012.11.08a' and 'idle.2012.10.24a' into HEAD	2012-11-16 09:59:58 -08:00
s390
scheduler
scsi	[SCSI] hptiop: Support HighPoint RR4520/RR4522 HBA	2012-11-27 08:59:43 +04:00
security	Documentation: fix Documentation/security/00-INDEX	2012-12-17 17:15:22 -08:00
serial
sh
sound	ALSA: usb-audio: Deprecate async_unlink option	2012-11-21 11:37:40 +01:00
spi	Documentation: remove __dev* attributes.	2013-01-03 15:57:16 -08:00
sysctl	Documentation/sysctl/kernel.txt: document /proc/sys/shmall	2013-01-04 16:11:46 -08:00
target
thermal	Thermal: Add documentation for platform layer data	2012-11-05 14:00:09 +08:00
timers
trace
usb	USB: report submission of active URBs	2012-11-11 18:10:46 -08:00
vDSO
video4linux	Documentation: remove __dev* attributes.	2013-01-03 15:57:16 -08:00
virtual	KVM: PPC: booke: Get/set guest EPCR register using ONE_REG interface	2012-12-06 01:34:20 +01:00
vm	Merge branch 'akpm' (Andrew's patch-bomb)	2012-12-13 13:11:15 -08:00
w1
watchdog
wimax
x86	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-12-19 12:56:42 -08:00
xtensa	xtensa: initialize atomctl SR	2012-12-18 21:10:22 -08:00
zh_CN	Documentation: remove depends on CONFIG_EXPERIMENTAL	2013-01-11 11:38:03 -08:00
.gitignore
00-INDEX	Documentation: remove reference to feature-removal-schedule.txt	2012-12-17 17:15:12 -08:00
applying-patches.txt
atomic_ops.txt
bad_memory.txt
basic_profiling.txt
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt
Changes
circular-buffers.txt
clk.txt
coccinelle.txt
CodingStyle	Documentation: remove depends on CONFIG_EXPERIMENTAL	2013-01-11 11:38:03 -08:00
cpu-hotplug.txt	doc: Add x86 CPU0 online/offline feature	2012-11-14 09:39:44 -08:00
cpu-load.txt
cputopology.txt
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
devices.txt	firmware: remove last vestiges of dabusb	2012-11-21 13:03:01 -08:00
digsig.txt
DMA-API-HOWTO.txt	Documentation DMA-API-HOWTO.txt Add dma mapping error check usage examples	2012-10-24 17:07:43 +02:00
DMA-API.txt	dma-debug: New interfaces to debug dma mapping errors	2012-10-24 17:06:43 +02:00
DMA-attributes.txt	common: DMA-mapping: add DMA_ATTR_FORCE_CONTIGUOUS attribute	2012-11-29 03:30:34 -08:00
dma-buf-sharing.txt	doc: fix quite a few typos within Documentation	2012-11-19 14:28:24 +01:00
DMA-ISA-LPC.txt
dmaengine.txt
dontdiff	x86: remove offsets.h from .gitignore and dontdiff	2012-11-19 14:10:53 +01:00
dynamic-debug-howto.txt	dynamic_debug: dynamic hex dump	2013-01-17 12:19:09 -08:00
edac.txt
eisa.txt
email-clients.txt
flexible-arrays.txt
futex-requeue-pi.txt
gcov.txt
gpio.txt	gpiolib: provide provision to register pin ranges	2012-11-11 19:06:00 +01:00
highuid.txt
HOWTO	HOWTO: fix double words typo	2012-12-10 15:54:27 +01:00
hw_random.txt
hwspinlock.txt
init.txt
initrd.txt
intel_txt.txt	Documentation: remove depends on CONFIG_EXPERIMENTAL	2013-01-11 11:38:03 -08:00
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt	IPMI: Remove SMBus driver info from the docs	2012-10-16 18:07:12 -07:00
IRQ-affinity.txt
IRQ-domain.txt	irqdomain: update documentation	2012-12-05 23:52:10 +00:00
IRQ.txt
irqflags-tracing.txt
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt	Kernel-doc: Convention: Use a "Return" section to describe return values	2012-11-27 21:08:57 +01:00
kernel-docs.txt
kernel-parameters.txt	Documentation: kernel-parameters.txt remove capability.disable	2012-12-20 17:40:19 -08:00
kmemcheck.txt
kmemleak.txt
kobject.txt
kprobes.txt
kref.txt	kref: Add kref_get_unless_zero documentation	2012-11-28 18:36:06 +10:00
ldm.txt
local_ops.txt
lockdep-design.txt
lockstat.txt
lockup-watchdogs.txt
logo.gif
logo.txt
magic-number.txt
Makefile
ManagementStyle
md.txt
media-framework.txt
memory-barriers.txt	Documentation: Fix memory-barriers.txt example	2012-10-23 14:44:46 -07:00
memory-hotplug.txt	hotplug: update nodemasks management	2012-12-12 17:38:33 -08:00
mono.txt
mutex-design.txt
nommu-mmap.txt
numastat.txt
oops-tracing.txt
padata.txt
parport-lowlevel.txt
parport.txt
percpu-rw-semaphore.txt
pi-futex.txt
pinctrl.txt	gpiolib: provide provision to register pin ranges	2012-11-11 19:06:00 +01:00
pnp.txt
preempt-locking.txt
printk-formats.txt
pwm.txt
ramoops.txt
rbtree.txt	rbtree: move augmented rbtree functionality to rbtree_augmented.h	2012-10-09 16:22:40 +09:00
remoteproc.txt
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt	Documentation: remove __dev* attributes.	2013-01-03 15:57:16 -08:00
rt-mutex-design.txt
rt-mutex.txt
rtc.txt
SAK.txt
SecurityBugs
serial-console.txt
sgi-ioc4.txt
sgi-visws.txt
SM501.txt
smsc_ece1099.txt
sparse.txt	Documentation/sparse.txt: document context annotations for lock checking	2012-12-17 17:15:23 -08:00
spinlocks.txt
stable_api_nonsense.txt
stable_kernel_rules.txt
static-keys.txt
SubmitChecklist
SubmittingDrivers
SubmittingPatches
svga.txt
sysfs-rules.txt
sysrq.txt	sparc64: Add global PMU register dumping via sysrq.	2012-10-16 09:34:01 -07:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt
VGA-softcursor.txt
vgaarbiter.txt
video-output.txt
vme_api.txt
volatile-considered-harmful.txt
workqueue.txt
xz.txt
zorro.txt