From fdd858db7113ca64132de390188d7ca00701013d Mon Sep 17 00:00:00 2001 From: Wolfgang Muees Date: Tue, 26 May 2009 08:56:19 +0100 Subject: mmc_spi: don't use EINVAL for possible transmission errors This patch changes the reported error code for the responses to a command from EINVAL to EFAULT/ENOSYS, as EINVAL is reserved for non-recoverable host errors, and the responses from the SD/MMC card may be because of recoverable transmission errors in the command or in the response. Response codes in SPI mode are NOT protected by a checksum, so don't trust them. Signed-off-by: Wolfgang Muees Acked-by: Matt Fleming Signed-off-by: Pierre Ossman --- drivers/mmc/host/mmc_spi.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'drivers/mmc') diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c index a789db8eed28..240608cc7ae9 100644 --- a/drivers/mmc/host/mmc_spi.c +++ b/drivers/mmc/host/mmc_spi.c @@ -335,15 +335,16 @@ checkstatus: /* Status byte: the entire seven-bit R1 response. */ if (cmd->resp[0] != 0) { - if ((R1_SPI_PARAMETER | R1_SPI_ADDRESS - | R1_SPI_ILLEGAL_COMMAND) + if ((R1_SPI_PARAMETER | R1_SPI_ADDRESS) & cmd->resp[0]) - value = -EINVAL; + value = -EFAULT; /* Bad address */ + else if (R1_SPI_ILLEGAL_COMMAND & cmd->resp[0]) + value = -ENOSYS; /* Function not implemented */ else if (R1_SPI_COM_CRC & cmd->resp[0]) - value = -EILSEQ; + value = -EILSEQ; /* Illegal byte sequence */ else if ((R1_SPI_ERASE_SEQ | R1_SPI_ERASE_RESET) & cmd->resp[0]) - value = -EIO; + value = -EIO; /* I/O error */ /* else R1_SPI_IDLE, "it's resetting" */ } -- cgit v1.2.3