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greybus: define GB_OP_NONEXISTENT
The i2c protocol needs a way to indicate an i2c device doesn't exist (which is not necessarily an error). Define GB_OP_NONEXISTENT to indicate this, and updating the status<->errno mapping functions accordingly. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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2 changed files with 5 additions and 0 deletions
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@ -396,6 +396,8 @@ static int gb_operation_status_map(u8 status)
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return -EINVAL;
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case GB_OP_RETRY:
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return -EAGAIN;
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case GB_OP_NONEXISTENT:
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return -ENODEV;
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case GB_OP_MALFUNCTION:
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return -EILSEQ;
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case GB_OP_UNKNOWN_ERROR:
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@ -431,6 +433,8 @@ static u8 gb_operation_errno_map(int errno)
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return GB_OP_RETRY;
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case -EILSEQ:
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return GB_OP_MALFUNCTION;
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case -ENODEV:
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return GB_OP_NONEXISTENT;
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case -EIO:
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default:
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return GB_OP_UNKNOWN_ERROR;
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@ -34,6 +34,7 @@ enum gb_operation_result {
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GB_OP_OVERFLOW = 0x05,
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GB_OP_INVALID = 0x06,
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GB_OP_RETRY = 0x07,
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GB_OP_NONEXISTENT = 0x08,
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GB_OP_UNKNOWN_ERROR = 0xfe,
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GB_OP_MALFUNCTION = 0xff,
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};
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