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| author | Pierre Ossman <drzeus@drzeus.cx> | 2008-07-06 01:10:27 +0200 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2008-07-15 14:14:49 +0200 |
| commit | 23af60398af2f5033e2f53665538a09f498dbc03 (patch) | |
| tree | fc244139d7d6bb1a82b80cc60fae86970e60c8c5 /include/linux/mmc/host.h | |
| parent | 97067d5581ec831a75a45a52e417bee0f7943dbf (diff) | |
| download | op-kernel-dev-23af60398af2f5033e2f53665538a09f498dbc03.zip op-kernel-dev-23af60398af2f5033e2f53665538a09f498dbc03.tar.gz | |
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>
Diffstat (limited to 'include/linux/mmc/host.h')
| -rw-r--r-- | include/linux/mmc/host.h | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 753b723..10a2080 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -111,12 +111,11 @@ struct mmc_host { unsigned long caps; /* Host capabilities */ #define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */ -#define MMC_CAP_MULTIWRITE (1 << 1) /* Can accurately report bytes sent to card on error */ -#define MMC_CAP_MMC_HIGHSPEED (1 << 2) /* Can do MMC high-speed timing */ -#define MMC_CAP_SD_HIGHSPEED (1 << 3) /* Can do SD high-speed timing */ -#define MMC_CAP_SDIO_IRQ (1 << 4) /* Can signal pending SDIO IRQs */ -#define MMC_CAP_SPI (1 << 5) /* Talks only SPI protocols */ -#define MMC_CAP_NEEDS_POLL (1 << 6) /* Needs polling for card-detection */ +#define MMC_CAP_MMC_HIGHSPEED (1 << 1) /* Can do MMC high-speed timing */ +#define MMC_CAP_SD_HIGHSPEED (1 << 2) /* Can do SD high-speed timing */ +#define MMC_CAP_SDIO_IRQ (1 << 3) /* Can signal pending SDIO IRQs */ +#define MMC_CAP_SPI (1 << 4) /* Talks only SPI protocols */ +#define MMC_CAP_NEEDS_POLL (1 << 5) /* Needs polling for card-detection */ /* host specific block data */ unsigned int max_seg_size; /* see blk_queue_max_segment_size */ |
