tree 139a30834cea40e0d967506cfdaea603cf56a192
parent 15084a4a63bc300c18b28a8a9afac870c552abce
author brking@us.ibm.com <brking@us.ibm.com> 1138050202 -0600
committer James Bottomley <jejb@mulgrave.(none)> 1138306430 -0500

[SCSI] Prevent scsi_execute_async from guessing cdb length

When the scsi_execute_async interface was added it ended up reducing
the flexibility of userspace to send arbitrary scsi commands through
sg using SG_IO. The SG_IO interface allows userspace to specify the
CDB length. This is now ignored in scsi_execute_async and it is
guessed using the COMMAND_SIZE macro, which is not always correct,
particularly for vendor specific commands. This patch adds a cmd_len
parameter to the scsi_execute_async interface to allow the caller
to specify the length of the CDB.

Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>