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Hema Kalliguddi 92d2711f5d usb: musb: unmap dma buffer when switching to PIO 
Buffer is mapped to dma when dma channel is
allocated. If, for some reason, dma channel
programming fails, musb code will fallback
to PIO mode to transfer that request. In
that case, we need to unmap the buffer
back to CPU.

MUSB RTL1.8 and above cannot handle buffers
which are not 32bit aligned. That happens to
every request sent by g_ether gadget
driver. Since the buffer sent was unaligned,
we need to fallback to PIO.

Because of that, g_ether was failing due
to missing buffer unmapping.

With this patch and [1] g_ether works fine
with all MUSB revisions.

Verified with OMAP3630 board, which has
MUSB RTL1.8 using g_ether and g_zero.

[1] http://www.spinics.net/lists/linux-usb/msg38400.html

Signed-off-by: Hema HK <hemahk@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
 		2010-11-22 12:36:48 +02:00
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accessibility
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acpi ACPI: debugfs custom_method open to non-root 2010-11-13 09:52:16 -08:00
amba
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ata sata_via: apply magic FIFO fix to vt6420 too 2010-11-19 13:16:26 -05:00
atm solos: Refuse to upgrade firmware with older FPGA. It doesn't work. 2010-11-08 12:17:05 -08:00
auxdisplay
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base PM: Allow devices to be removed during late suspend and early resume 2010-11-11 01:50:53 +01:00
block BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
bluetooth Bluetooth: Add MacBookAir3,1(2) support 2010-11-09 01:08:53 -02:00
cdrom
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char BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
clocksource ARM: shmobile: remove sh_timer_config clk member 2010-10-31 10:40:39 -04:00
connector
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cpufreq
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cpuidle
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crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2010-11-13 09:55:56 -08:00
dca
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dio
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dma drivers/dma/Kconfig: add part number for Topcliff. 2010-10-29 14:14:02 -07:00
edac
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eisa
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firewire SCSI host lock push-down 2010-11-16 13:33:23 -08:00
firmware
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gpio gpio: Add VIA VX855 GPIO driver 2010-10-29 00:29:51 +02:00
gpu Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel 2010-11-19 10:28:13 -08:00
hid BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
hwmon hwmon: (w83795) Check for BEEP pin availability 2010-11-15 21:38:57 +01:00
i2c i2c: Sanity checks on adapter registration 2010-11-15 22:40:38 +01:00
ide
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idle
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ieee802154
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infiniband BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-11-19 10:31:04 -08:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-11-05 15:25:48 -07:00
leds drivers/leds/leds-gpio.c: properly initialize return value 2010-11-12 07:55:32 -08:00
lguest
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macintosh drivers/macintosh/adb-iop.c: flags should be unsigned long 2010-11-12 07:55:30 -08:00
mca
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md block: read i_size with i_size_read() 2010-11-10 14:40:53 +01:00
media BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
memstick
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message SCSI host lock push-down 2010-11-16 13:33:23 -08:00
mfd mfd: Fix a memory leak when unload mc13xxx-core module 2010-10-29 00:30:43 +02:00
misc i2c: Remove obsolete cleanup for clientdata 2010-11-15 22:40:38 +01:00
mmc mfd: Adding twl6030 mmc card detect support for MMC1 2010-10-29 00:29:59 +02:00
mtd Merge git://git.infradead.org/mtd-2.6 2010-10-30 08:31:35 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-11-19 15:25:59 -08:00
nubus
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of
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oprofile Merge branches 'perf-fixes-for-linus' and 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-10-30 11:43:26 -07:00
parisc BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
parport
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pci BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
pcmcia drivers/pcmcia/soc_common.c: Use printf extension %pV 2010-11-10 14:31:28 +01:00
platform
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pnp BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
power power: Revert "power_supply: Mark twl4030_charger as broken" 2010-10-29 00:30:44 +02:00
pps
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ps3
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rapidio rapidio: use resource_size() 2010-11-12 07:55:30 -08:00
regulator regulator: max8998 BUCK1/2 voltage change with use of GPIOs 2010-10-29 00:30:15 +02:00
rtc Merge branches 'sh/rtc' and 'common/clkfwk' into sh/urgent 2010-11-10 18:15:44 +09:00
s390 BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
sbus
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scsi BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
serial BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
sfi
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sh sh: intc: Fix up build failure introduced by radix tree changes. 2010-11-15 14:30:30 +09:00
sn
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spi Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6 2010-11-01 07:50:43 -04:00
ssb
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staging Fix build failure at cx25821-video driver 2010-11-18 11:42:05 -08:00
tc
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telephony
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thermal
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tty Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-11-19 10:31:04 -08:00
uio
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usb usb: musb: unmap dma buffer when switching to PIO 2010-11-22 12:36:48 +02:00
uwb UWB: Return UWB_RSV_ALLOC_NOT_FOUND rather than crashing on NULL dereference if kzalloc fails 2010-11-11 07:14:07 -08:00
vhost
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video BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
virtio
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vlynq
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w1
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watchdog WATCHDOG: octeon-wdt: Use I/O clock rate for timing calculations. 2010-10-29 19:08:42 +01:00
xen BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
zorro BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
Kconfig
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Makefile TTY: create drivers/tty and move the tty core files there 2010-11-05 08:10:33 -07:00