summaryrefslogtreecommitdiff
path: root/include/linux/mmc
diff options
context:
space:
mode:
authorPierre Ossman <drzeus@drzeus.cx>2008-07-06 01:10:27 +0200
committerPierre Ossman <drzeus@drzeus.cx>2008-07-15 14:14:49 +0200
commit23af60398af2f5033e2f53665538a09f498dbc03 (patch)
treefc244139d7d6bb1a82b80cc60fae86970e60c8c5 /include/linux/mmc
parent97067d5581ec831a75a45a52e417bee0f7943dbf (diff)
downloadlinux-3.10-23af60398af2f5033e2f53665538a09f498dbc03.tar.gz
linux-3.10-23af60398af2f5033e2f53665538a09f498dbc03.tar.bz2
linux-3.10-23af60398af2f5033e2f53665538a09f498dbc03.zip
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')
-rw-r--r--include/linux/mmc/host.h11
1 files changed, 5 insertions, 6 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 753b7231b88..10a2080086c 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 */