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b417577d3b
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Adrian Hunter b417577d3b omap_hsmmc: improve interrupt synchronisation 
The following changes were needed:
	- do not use in_interrupt() because it will not work
	with threaded interrupts

In addition, the following improvements were made:
	- ensure DMA is unmapped only after the final DMA interrupt
	- ensure a request is completed only after the final DMA interrupt
	- disable controller interrupts when a request is not in progress
	- remove the spin-lock protecting the start of a new request from
	an unexpected interrupt because the locking was complicated and
	a 'req_in_progress' flag suffices (since the spin-lock only defers
	the unexpected interrupts anyway)
	- instead use the spin-lock to protect the MMC interrupt handler
	from the DMA interrupt handler
	- remove the semaphore preventing DMA from being started while
	the previous DMA is still in progress - the other changes make that
	impossible, so it is now a BUG_ON condition
	- ensure the controller interrupt status is clear before exiting
	the interrrupt handler

In general, these changes make the code safer but do not fix any specific
bugs so backporting is not necessary.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Tested-by: Venkatraman S <svenkatr@ti.com>
Acked-by: Madhusudhan Chikkature <madhu.cr@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-27 09:12:40 -07:00
..
accessibility
acpi drivers: acpi: don't use own implementation of hex_to_bin() 2010-05-25 08:07:06 -07:00
amba
ata Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
atm Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
auxdisplay auxdisplay: section cleanup in cfag12864bfb driver 2010-05-25 08:07:09 -07:00
base mm: compaction: add /sys trigger for per-node memory compaction 2010-05-25 08:06:59 -07:00
block Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-05-20 21:04:44 -07:00
cdrom of: Always use 'struct device.of_node' to get device node pointer. 2010-05-18 16:10:44 -06:00
char Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-05-26 12:30:09 -07:00
clocksource Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-05-19 17:10:57 -07:00
connector
cpufreq Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-05-18 08:49:13 -07:00
cpuidle cpuidle: add a repeating pattern detector to the menu governor 2010-05-25 08:07:02 -07:00
crypto Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
dca
dio
dma kernel-wide: replace USHORT_MAX, SHORT_MAX and SHORT_MIN with USHRT_MAX, SHRT_MAX and SHRT_MIN 2010-05-25 08:07:02 -07:00
edac Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
eisa
firewire Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-05-20 09:20:59 -07:00
firmware sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
gpio Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
gpu Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-05-26 12:30:09 -07:00
hid HID: roccat: fix build failure if built as module 2010-05-25 09:58:05 +02:00
hwmon drivers/hwmon/coretemp.c: get TjMax value from MSR 2010-05-25 08:07:07 -07:00
i2c Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6 2010-05-24 08:05:29 -07:00
idle
ieee1394
ieee802154
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2010-05-25 12:05:17 -07:00
input Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-05-25 16:59:51 -07:00
leds of: Remove duplicate fields from of_platform_driver 2010-05-22 00:10:40 -06:00
lguest
macintosh Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
mca
md Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2010-05-21 19:37:45 -07:00
media Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
memstick
message fusion: fix kernel-doc notation 2010-05-24 07:31:20 -07:00
mfd regulator: use voltage number array in 88pm860x 2010-05-25 10:16:02 +01:00
misc ad525x_dpot: add support for one time programmable pots 2010-05-25 08:07:04 -07:00
mmc omap_hsmmc: improve interrupt synchronisation 2010-05-27 09:12:40 -07:00
mtd Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-05-25 16:59:51 -07:00
nubus
of Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
oprofile
parisc
parport Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
pci Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2010-05-21 18:58:52 -07:00
pcmcia Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
platform Move N014, N051 and CR620 dmi information to load scm dmi table 2010-05-20 10:16:13 -04:00
pnp
power Merge git://git.infradead.org/battery-2.6 2010-05-25 08:16:34 -07:00
pps
ps3
rapidio sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
regulator regulator: return set_mode is same mode is requested 2010-05-25 10:16:02 +01:00
rtc rtc: use genirq directly in rtc-wm831x 2010-05-25 08:07:08 -07:00
s390 sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
sbus Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
scsi kernel-wide: replace USHORT_MAX, SHORT_MAX and SHORT_MIN with USHRT_MAX, SHRT_MAX and SHRT_MIN 2010-05-25 08:07:02 -07:00
serial Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6 2010-05-25 12:04:17 -07:00
sfi
sh sh: simplify WARN usage in SH clock driver 2010-05-13 17:43:11 +09:00
sn
spi spi/xilinx: Fix compile error 2010-05-25 00:48:24 -06:00
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-05-20 21:04:44 -07:00
staging staging: rt2860: use new hex_to_bin() method 2010-05-25 08:07:05 -07:00
tc
telephony
thermal
uio
usb Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2010-05-25 12:06:33 -07:00
uwb
vhost kernel-wide: replace USHORT_MAX, SHORT_MAX and SHORT_MIN with USHRT_MAX, SHRT_MAX and SHRT_MIN 2010-05-25 08:07:02 -07:00
video nuc900fb: release correct mem region 2010-05-25 08:07:09 -07:00
virtio Merge branch 'virtio' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus 2010-05-21 17:22:52 -07:00
vlynq vlynq: make whole Kconfig-menu dependant on architecture 2010-05-14 16:59:54 +02:00
w1 sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
watchdog watchdog: Driver for the watchdog timer on Freescale IMX2 (and later) processors. 2010-05-25 12:43:46 +00:00
xen xen: fix build when SYSRQ is disabled 2010-05-25 08:07:07 -07:00
zorro sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
Kconfig
Makefile