mmc: block: allow get_card_status() to return error status

If the MMC_SEND_STATUS command is not successful, we should not return
a zero status word, but instead allow the caller to know positively
that an error occurred.

Convert the open-coded get_card_status() to use the helper function,
and provide definitions for the card state field.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 5bade0605641..5a794cb503ea 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -140,6 +140,16 @@ static inline bool mmc_op_multi(u32 opcode)
 #define R1_SWITCH_ERROR         (1 << 7)        /* sx, c */
 #define R1_APP_CMD              (1 << 5)        /* sr, c */
 
+#define R1_STATE_IDLE   0
+#define R1_STATE_READY  1
+#define R1_STATE_IDENT  2
+#define R1_STATE_STBY   3
+#define R1_STATE_TRAN   4
+#define R1_STATE_DATA   5
+#define R1_STATE_RCV    6
+#define R1_STATE_PRG    7
+#define R1_STATE_DIS    8
+
 /*
  * MMC/SD in SPI mode reports R1 status always, and R2 for SEND_STATUS
  * R1 is the low order byte; R2 is the next highest byte, when present.