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>
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 @@
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 */