mmc: remove custom error codes

Convert the MMC layer to use standard error codes and not its own,
incompatible values.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 13 insertions, 6 deletions

diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 63a80ea61124..a2b79518f051 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -54,12 +54,19 @@ struct mmc_command {
         unsigned int            retries;        /* max number of retries */
         unsigned int            error;          /* command error */
 
-#define MMC_ERR_NONE    0
-#define MMC_ERR_TIMEOUT 1
-#define MMC_ERR_BADCRC  2
-#define MMC_ERR_FIFO    3
-#define MMC_ERR_FAILED  4
-#define MMC_ERR_INVALID 5
+/*
+ * Standard errno values are used for errors, but some have specific
+ * meaning in the MMC layer:
+ *
+ * ETIMEDOUT    Card took too long to respond
+ * EILSEQ       Basic format problem with the received or sent data
+ *              (e.g. CRC check failed, incorrect opcode in response
+ *              or bad end bit)
+ * EINVAL       Request cannot be performed because of restrictions
+ *              in hardware and/or the driver
+ * ENOMEDIUM    Host can determine that the slot is empty and is
+ *              actively failing requests
+ */
 
         struct mmc_data         *data;          /* data segment associated with cmd */
         struct mmc_request      *mrq;           /* associated request */