Commit Graph

621 Commits

Author SHA1 Message Date
David Brownell
e385ea63f4 mmc: at91_mci: don't use coherent dma buffers
At91_mci is abusing dma_free_coherent(), which may not be called with IRQs
disabled.  I saw "mkfs.ext3" on an MMC card objecting voluminously as each
write completed:

 WARNING: at arch/arm/mm/consistent.c:368 dma_free_coherent+0x2c/0x224()
 [<c002726c>] (dump_stack+0x0/0x14) from [<c00387d4>] (warn_on_slowpath+0x4c/0x68)
 [<c0038788>] (warn_on_slowpath+0x0/0x68) from [<c0028768>] (dma_free_coherent+0x2c/0x224)
  r6:00008008 r5:ffc06000 r4:00000000
 [<c002873c>] (dma_free_coherent+0x0/0x224) from [<c01918ac>] (at91_mci_irq+0x374/0x420)
 [<c0191538>] (at91_mci_irq+0x0/0x420) from [<c0065d9c>] (handle_IRQ_event+0x2c/0x6c)
 ...

This bug has been around for a LONG time.  The MM warning is from late
2005, but the driver merged a year later ...  so I'm puzzled why nobody
noticed this before now.

The fix involves noting that this buffer shouldn't be DMA-coherent; it's
just used for normal DMA writes.  So replace it with standard kmalloc()
buffering and DMA mapping calls.

This is the quickie fix.  A better one would not rely on allocating large
bounce buffers.  (Note that dma_alloc_coherent could have failed too, but
that case was ignored...  kmalloc is a bit more likely to fail though.)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Pierre Ossman <drzeus-mmc@drzeus.cx>
Cc: Andrew Victor <linux@maxim.org.za>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-09-02 19:21:38 -07:00
Huang Weiyi
fe7f962505 sdricoh_cs: removed unused #include <version.h>
The drivers below do not use LINUX_VERSION_CODE nor KERNEL_VERSION.
  drivers/mmc/host/sdricoh_cs.c

This patch removes the said #include <version.h>.

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-17 20:01:35 +02:00
Ben Dooks
87dd98037d s3cmci: attach get_cd host ops
Attach the routine to get_cd to allow the MMC core to find out whether
there is a card present or not without the tedious process of trying to
send commands to the card or not.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-17 20:00:22 +02:00
Ben Dooks
5d304400a9 s3cmci: fix sparse errors from non-exported functions
Fix the following sparse errors by making the functions
static and fixing the check for host->base.

598:6: warning: symbol 's3cmci_dma_done_callback' was not declared. Should it be static?
744:6: warning: symbol 's3cmci_dma_setup' was not declared. Should it be static?
1209:20: warning: Using plain integer as NULL pointer

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-17 19:59:27 +02:00
Samuel Ortiz
1c2c30acc5 mfd: have TMIO drivers and subdevices depend on ARM
The TMIO chips are only found (and thus tested) on ARM machines.
Moreover, we don't want the TMIO cells to be built if one of the TMIO
driver is not selected (which indirectly make the TMIO cells drivers
depend on ARM as well).

Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
2008-08-10 23:30:34 +02:00
Ian Molton
4a48998fa1 mfd: TMIO MMC driver
This patch adds support for the MMC subdevice 'cell' commonly found in
TMIO based MFDs.

Signed-off-by: Ian Molton <spyro@f2s.com>
Acked-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
2008-08-10 23:30:16 +02:00
Russell King
a09e64fbc0 [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach
This just leaves include/asm-arm/plat-* to deal with.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07 09:55:48 +01:00
Russell King
a1b81a84ff Merge branch 'header-move' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6 2008-08-07 09:55:16 +01:00
Russell King
4fb8af10d0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes 2008-08-07 09:55:03 +01:00
Russell King
0f8469a54f [ARM] Eliminate useless includes of asm/mach-types.h
There are 43 includes of asm/mach-types.h by files that don't
reference anything from that file.  Remove these unnecessary
includes.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07 09:40:04 +01:00
Haavard Skinnemoen
3663b736a5 avr32: Use <mach/foo.h> instead of <asm/arch/foo.h>
Update all avr32-specific files to use the new platform-specific header
locations. Drivers shared with ARM are left alone for now.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-08-05 14:36:57 +02:00
Manuel Lauss
e491d230fd au1xmmc: raise segment size limit.
Raise the DMA block size limit from 2048 bytes to the maximum supported
by the DMA controllers on the chip (64KB on Au1100, 4MB on Au1200).

This gives a very small performance boost and apparently fixes an oops
when MMC-DMA and network traffic are active at the same time.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-01 19:04:26 +02:00
Pierre Ossman
b41e9c7b8e mmc_block: use proper sg iterators
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-01 19:03:38 +02:00
Pierre Ossman
a84756c573 mmc: properly iterate over sg list in debug check
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-01 19:03:37 +02:00
Pierre Ossman
b7ac2cf1cd mmc_test: Revert "mmc_test: test oversized sg lists"
This reverts commit 48b5352ea1. Oversized
sg lists are not allowed anymore, and the core even checks for them in
debug mode, so this test is entirely incorrect.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-01 19:03:37 +02:00
Pierre Ossman
980167b7fb sdhci: check correct return value
Fix a copy-and-paste error.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-01 19:03:36 +02:00
Pierre Ossman
ebd6d35784 sdhci: disable DMA for req, not completely
The wrong flag was manipulated when an invalid sg list was given, turning
off DMA on the next (and all subsequent) request instead of the current
one.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-01 19:03:35 +02:00
Pierre Ossman
4a3cba32cb sdhci: handle bug in JMB38x for sizes < 4 bytes
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-08-01 19:03:35 +02:00
David Brownell
3c26e17032 avr32: some mmc/sd cleanups
Minor cleanups for the MMC/SD support on avr32:

 - Make at32_add_device_mci() properly initialize "missing"
   platform data ... so boards like STK1002 won't try GPIO 0.

 - Switch over to gpio_is_valid() instead of testing for only
   one designated value.

 - Provide STK1002 platform data for the unlikely case that
   switches are set so first Ethernet controller isn't in use.
   (That's the only way to get card detect and writeprotect
   switch sensing on the STK1000.)

And get rid of one "unused variable" warning.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-07-27 13:57:36 +02:00
Haavard Skinnemoen
eda3d8f560 Merge commit 'upstream/master' 2008-07-27 13:54:08 +02:00
Linus Torvalds
bdee6ac7d1 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
  atmel-mci: debugfs support
  mmc: Add per-card debugfs support
  mmc: Export internal host state through debugfs
  imxmmc: fix crash when no platform data is provided
  imxmmc: fix platform resources
  imxmmc: remove DEBUG definition
  mmc_spi: put signals to low power off fix
2008-07-26 20:27:31 -07:00
Haavard Skinnemoen
deec9ae31e atmel-mci: debugfs support
Create additional files under the host's debugfs directory containing
additional host-specific debug information.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-27 01:26:17 +02:00
Haavard Skinnemoen
f4b7f927b5 mmc: Add per-card debugfs support
For each card successfully added to the bus, create a subdirectory under
the host's debugfs root with information about the card.

At the moment, only a single file is added to the card directory for
all cards: "state". It reflects the "state" field in struct mmc_card,
indicating whether the card is present, readonly, etc.

For MMC and SD cards (not SDIO), another file is added: "status".
Reading this file will ask the card about its current status and
return it. This can be useful if the card just refuses to respond to
any commands, which might indicate that the card state is not what the
MMC core thinks it is (due to a missing stop command, for example.)

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-27 01:26:17 +02:00
Haavard Skinnemoen
6edd8ee60a mmc: Export internal host state through debugfs
When CONFIG_DEBUG_FS is set, create a few files under /sys/kernel/debug
containing information about an mmc host's internal state. Currently,
just a single file is created, "ios", which contains information about
the current operating parameters for the bus (clock speed, bus width,
etc.)

Host drivers can add additional files and directories under the host's
root directory by passing the debugfs_root field in struct mmc_host as
the 'parent' parameter to debugfs_create_*.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-27 01:26:16 +02:00
Paulius Zaleckas
c5d5e9c40f imxmmc: fix crash when no platform data is provided
Don't crash if no platform data is provided.
In this case assume that card is present.

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Acked-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-27 01:26:16 +02:00
Paulius Zaleckas
5fc63dfba8 imxmmc: fix platform resources
Fixup platform resources handling.

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Acked-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-27 01:26:15 +02:00
Paulius Zaleckas
322069c9df imxmmc: remove DEBUG definition
Removed DEBUG #define #undef, because module is automaticaly
compiled with -DDEBUG when CONFIG_MMC_DEBUG is defined.
Currently it just generates compiler warning about redefinition.

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Acked-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-27 01:26:14 +02:00
FUJITA Tomonori
8d8bb39b9e dma-mapping: add the device argument to dma_mapping_error()
Add per-device dma_mapping_ops support for CONFIG_X86_64 as POWER
architecture does:

This enables us to cleanly fix the Calgary IOMMU issue that some devices
are not behind the IOMMU (http://lkml.org/lkml/2008/5/8/423).

I think that per-device dma_mapping_ops support would be also helpful for
KVM people to support PCI passthrough but Andi thinks that this makes it
difficult to support the PCI passthrough (see the above thread).  So I
CC'ed this to KVM camp.  Comments are appreciated.

A pointer to dma_mapping_ops to struct dev_archdata is added.  If the
pointer is non NULL, DMA operations in asm/dma-mapping.h use it.  If it's
NULL, the system-wide dma_ops pointer is used as before.

If it's useful for KVM people, I plan to implement a mechanism to register
a hook called when a new pci (or dma capable) device is created (it works
with hot plugging).  It enables IOMMUs to set up an appropriate
dma_mapping_ops per device.

The major obstacle is that dma_mapping_error doesn't take a pointer to the
device unlike other DMA operations.  So x86 can't have dma_mapping_ops per
device.  Note all the POWER IOMMUs use the same dma_mapping_error function
so this is not a problem for POWER but x86 IOMMUs use different
dma_mapping_error functions.

The first patch adds the device argument to dma_mapping_error.  The patch
is trivial but large since it touches lots of drivers and dma-mapping.h in
all the architecture.

This patch:

dma_mapping_error() doesn't take a pointer to the device unlike other DMA
operations.  So we can't have dma_mapping_ops per device.

Note that POWER already has dma_mapping_ops per device but all the POWER
IOMMUs use the same dma_mapping_error function.  x86 IOMMUs use device
argument.

[akpm@linux-foundation.org: fix sge]
[akpm@linux-foundation.org: fix svc_rdma]
[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix bnx2x]
[akpm@linux-foundation.org: fix s2io]
[akpm@linux-foundation.org: fix pasemi_mac]
[akpm@linux-foundation.org: fix sdhci]
[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix sparc]
[akpm@linux-foundation.org: fix ibmvscsi]
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-26 12:00:03 -07:00
Andrew Morton
0c7ad106e7 drivers/mmc/host/sdhci.h needs scatterlist.h
alpha:

drivers/mmc/host/sdhci.h:242: error: field 'sg_miter' has incomplete type

Cc: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-26 12:00:01 -07:00
Jan Nikitenko
1685a03e98 mmc_spi: put signals to low power off fix
The original intention was to write a zero byte to mmc to force spi
signals to low when doing power off. Somehow the spi_w8r8 call got there
so a read followed the write of single zero byte. This patch changes
that to simple write of zero byte without the following read.
This way the power off is more reliable and completely sufficient.

Signed-off-by: Jan Nikitenko <jan.nikitenko@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-24 01:27:07 +02:00
Pierre Ossman
7659150c60 sdhci: highmem capable PIO routines
Improve the PIO handling so that it can service highmem pages.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:42:09 +02:00
Pierre Ossman
60c9c7b1d9 mmc_test: print message when attaching to card
Make it a bit more obvious that the card has been claimed by the
mmc_test driver so that people don't have to wonder why their block
device never shows up.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:42:09 +02:00
Pierre Ossman
2ff1fa6791 mmc_block: bounce buffer highmem support
Support highmem pages in the bounce buffer code by using the
sg_copy_from/to_buffer() functions.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:42:09 +02:00
Pierre Ossman
719a61b452 sdhci: fix bad warning from commit c8b3e02
Commit c8b3e02 renamed a variable, but missed one reference to it
inside a WARN_ON, causing it to incorrectly trigger.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:42:09 +02:00
Pierre Ossman
6cefd05f35 sdhci: add warnings for bad buffers in ADMA path
The ADMA code path assumes that the 3 byte alignment fix doesn't cross
a page boundary. I'm not convinced this is worth supporting, but at
least print a warning in the off chance we'll actually see such a request.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:42:09 +02:00
Pierre Ossman
48b5352ea1 mmc_test: test oversized sg lists
Add tests that make sure the driver properly checks the blocks and
blksz fields and doesn't assume the sg list has a size that perfectly
matches the current request.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:42:08 +02:00
Pierre Ossman
2661081f5a mmc_test: highmem tests
Add a couple of tests to make sure the host driver handles highmem
memory pages properly. Unfortunately there is no way to guarantee an
allocation below 4 GB in i386, so it might give you addresses that
are out of reach for the hardware (OTOH, so will any other highmem
allocation in the kernel).

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:42:08 +02:00
Ben Dooks
907b2cd6db s3cmci: ensure host stopped on machine shutdown
Ensure that the s3cmci host controller is turned off
when the machine is shutdown, otherwise we end up
leaving the card powered and processing insertion and
removal events after the system prints "System halted."

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:18:06 +02:00
Manuel Lauss
dd8572af68 au1xmmc: suspend/resume implementation
Basic suspend/resume support: disable peripheral on suspend and
reinit on resume.

Tested on Au1200.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:18:06 +02:00
Ben Dooks
d2f2761bb7 s3cmci: fixes for section mismatch warnings
Fix the naming of various functions in the s3cmc
driver to stop triggering section mismatch warnings.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:18:06 +02:00
Karl Beldan
4fe16897c5 pxamci: trivial fix of DMA alignment register bit clearing
Signed-off-by: Karl Beldan <karl.beldan@gmail.com>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-23 14:18:06 +02:00
Ben Nizette
fbfca4b878 avr32: clean up mci platform code
This patch does a few small cleanups around the atmel mci platform code
and in the atmel-mci driver.  The platform changes simply removes an
unused variable, uses the fact that by the end we always have some form
of platform data and notes that GPIO_PIN_NONE != 0.  This last point
could cause the incorrect attempt to twice reserve pin PA0.

While we've got the hood up, add linux/err.h to the atmel-mci.c include
list.  It needs it and generally pulls it by voodoo but I did once
stumble across a config which don't build.

This is against Linus' latest git.

Signed-off-by: Ben Nizette <bn@niasdigital.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-07-18 11:01:16 +02:00
Linus Torvalds
8a0ca91e1d Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc: (68 commits)
  sdio_uart: Fix SDIO break control to now return success or an error
  mmc: host driver for Ricoh Bay1Controllers
  sdio: sdio_io.c Fix sparse warnings
  sdio: fix the use of hard coded timeout value.
  mmc: OLPC: update vdd/powerup quirk comment
  mmc: fix spares errors of sdhci.c
  mmc: remove multiwrite capability
  wbsd: fix bad dma_addr_t conversion
  atmel-mci: Driver for Atmel on-chip MMC controllers
  mmc: fix sdio_io sparse errors
  mmc: wbsd.c fix shadowing of 'dma' variable
  MMC: S3C24XX: Refuse incorrectly aligned transfers
  MMC: S3C24XX: Add maintainer entry
  MMC: S3C24XX: Update error debugging.
  MMC: S3C24XX: Add media presence test to request handling.
  MMC: S3C24XX: Fix use of msecs where jiffies are needed
  MMC: S3C24XX: Add MODULE_ALIAS() entries for the platform devices
  MMC: S3C24XX: Fix s3c2410_dma_request() return code check.
  MMC: S3C24XX: Allow card-detect on non-IRQ capable pin
  MMC: S3C24XX: Ensure host->mrq->data is valid
  ...

Manually fixed up bogus executable bits on drivers/mmc/core/sdio_io.c
and include/linux/mmc/sdio_func.h when merging.
2008-07-16 15:17:52 -07:00
David Howells
c43d863697 sdio_uart: Fix SDIO break control to now return success or an error
This is a consequence of patch 9ea761bfef52c116fed4715d4043392c2503fe6a.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 15:47:04 +02:00
Sascha Sommer
6a36913a33 mmc: host driver for Ricoh Bay1Controllers
Signed-off-by: Sascha Sommer <saschasommer@freenet.de>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 15:47:04 +02:00
Tomas Winkler
ea901300cd sdio: sdio_io.c Fix sparse warnings
Unfold nested macros it creates not readable code and
sparse warnings
sdio_io.c:190:9: warning: symbol '_min1' shadows an earlier one

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 15:47:03 +02:00
Benzi Zbit
62a7573ee9 sdio: fix the use of hard coded timeout value.
This adds reading and using of enable_timeout from the CIS

Signed-off-by: Benzi Zbit <benzi.zbit@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 15:47:03 +02:00
Andres Salomon
c71f65129a mmc: OLPC: update vdd/powerup quirk comment
This comment update got lost in the great floo^Wmerge.  As Pierre
pointed out, no one knows what 'CaFe' is.

Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 14:14:50 +02:00
Tomas Winkler
c8b3e02eb2 mmc: fix spares errors of sdhci.c
1. sdhci_prepare_data: fix shadowing of count variable
	u8 count
	int count -> sg_cnt;
2.  sdhci_add_host: assignment of integer to pointer
	dma_mask = 0 -> dma_mask = NULL;

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 14:14:49 +02:00
Pierre Ossman
23af60398a mmc: remove multiwrite capability
Relax requirements on host controllers and only require that they do not
report a transfer count than is larger than the actual one (i.e. a lower
value is okay). This is how many other parts of the kernel behaves so
upper layers should already be prepared to handle that scenario. This
gives us a performance boost on MMC cards.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 14:14:49 +02:00