mx_sb_len
The Linux SCSI Generic (sg) HOWTO
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6.4. mx_sb_len

This is the maximum size that can be written back to the 'sbp' pointer when a sense_buffer is output which is usually in an error situation. The actual number written out is given by 'sb_len_wr'. In all cases 'sb_len_wr' <= 'mx_sb_len' . The type of mx_sb_len is unsigned char.

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