Change the definition of SG_ALL from 255, which was the biggest possible
scatter list array in 32 bit ARCHs (minus one who knows why), to be ~0.
Which means that LLD has no size limit on number of scatter-list array
and the actual size will be determined by upper layers.
Also SG_NONE is removed because it is no longer supported.
Note: SG_ALL can not be used as an allocation size anymore.
FIXME: Important/capable drivers like iscsi have moved away from
SG_ALL to hard coded numbers like 4096. They should reuse
SG_ALL now.
Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
---
include/scsi/scsi_host.h | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 5c58d59..6032d07 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -21,16 +21,14 @@ struct blk_queue_tags;
/*
- * The various choices mean:
- * NONE: Self evident. Host adapter is not capable of scatter-gather.
+ * values to use with .sg_tablesize:
* ALL: Means that the host adapter module can do scatter-gather,
* and that there is no limit to the size of the table to which
* we scatter/gather data.
* Anything else: Indicates the maximum number of chains that can be
* used in one scatter-gather request.
*/
-#define SG_NONE 0
-#define SG_ALL 0xff
+#define SG_ALL (~0)
#define MODE_UNKNOWN 0x00
#define MODE_INITIATOR 0x01
--
1.5.3.3
-
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