blk_complete_sghdr_rq

Name:blk_complete_sghdr_rq

Proto:static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr, struct bio *bio)

Type:int

Parameter:

Type	Parameter	Name
struct request *	rq
struct sg_io_hdr *	hdr
struct bio *	bio

247

req = scsi_req(rq)

248

ret = 0

253

[o] scsi status = result & 0xff

254

[o] shifted, masked scsi status = Use these to separate status msg and our bytes* These are set by:* status byte = set from target device* msg_byte = return status from host adapter itself.* host_byte = set by low-level driver to indicate status.* driver_byte = set by mid-level.(result)

255

[o] messaging level data (optional) = msg_byte(result)

256

[o] errors from host adapter = host_byte(result)

257

[o] errors from software driver = driver_byte(result)

258

[o] auxiliary information = 0

259

If [o] shifted, masked scsi status || [o] errors from host adapter || [o] errors from software driver Then [o] auxiliary information |= something abnormal happened

261

[o] dxfer_len - actual_transferred = residual count

262

[o] byte count actually written to sbp = 0

264

If sense_len && [i], [*o] points to sense_buffer memory Then

265

len = min - return minimum of two values of the same or compatible types*@x: first value*@y: second value((unsignedint) [i] max length to write to sbp , sense_len)

267

If Not copy_to_user( [i], [*o] points to sense_buffer memory , sense, len) Then [o] byte count actually written to sbp = len

269

Else ret = -EFAULT

273

r = lk_rq_unmap_user - unmap a request with user data*@bio: start of bio list* Description:* Unmap a rq previously mapped by blk_rq_map_user(). The caller must* supply the original rq->bio from the blk_rq_map_user() return, since

274

If Not ret Then ret = r

277

Return ret

**Caller**
Name	Describe
sg_io

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