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ieee1394: sbp2: better handling of transport errors

Telusuri Sumber 
If the target signals a transport failure via status block, complete the
request with DID_BUSY to indicate to the SCSI subsystem that the command
may succeed when retried.

Also log diagnostic information if the status block shows a transport
related problem.  It may point to hardware faults.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter
2006-08-14 18:51:00 +02:00
orang tua 4fc383c09d
melakukan abbca103a0
2 mengubah file dengan 14 tambahan dan 8 penghapusan
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6
drivers/ieee1394/sbp2.h
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@@ -181,11 +181,11 @@ struct sbp2_unrestricted_page_table {
#define SBP2_SCSI_STATUS_SELECTION_TIMEOUT 0xff
#define STATUS_GET_SRC(value) (((value) >> 30) & 0x3)
#define STATUS_GET_RESP(value) (((value) >> 28) & 0x3)
#define STATUS_GET_LEN(value) (((value) >> 24) & 0x7)
#define STATUS_GET_SBP_STATUS(value) (((value) >> 16) & 0xff)
#define STATUS_GET_ORB_OFFSET_HI(value) ((value) & 0x0000ffff)
#define STATUS_TEST_D(value) ((value) & 0x08000000)
/* test 'resp' | 'sbp2_status' */
#define STATUS_TEST_RS(value) ((value) & 0x30ff0000)
#define STATUS_TEST_DEAD(value) ((value) & 0x08000000)
/* test 'resp' | 'dead' | 'sbp2_status' */
#define STATUS_TEST_RDS(value) ((value) & 0x38ff0000)