mmc: core: Use CMD23 for multiblock transfers when we can.
CMD23-prefixed instead of open-ended multiblock transfers
have a performance advantage on some MMC cards.
Signed-off-by: Andrei Warkentin <andreiw@motorola.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 9fa5a73..ac26a68 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -83,6 +83,12 @@
#define MMC_APP_CMD 55 /* ac [31:16] RCA R1 */
#define MMC_GEN_CMD 56 /* adtc [0] RD/WR R1 */
+static inline bool mmc_op_multi(u32 opcode)
+{
+ return opcode == MMC_WRITE_MULTIPLE_BLOCK ||
+ opcode == MMC_READ_MULTIPLE_BLOCK;
+}
+
/*
* MMC_SWITCH argument format:
*