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[SCSI] iscsi_tcp: fix setting of r2t

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If we negotiate for X r2ts we have to use only X r2ts. We cannot
round up (we could send less though). It is ok to fail if it
is not something the driver can handle, so this patch just does
that.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Mike Christie 2007-12-13 12:43:42 -06:00 committed by James Bottomley
parent 1183657217
commit df93ffcd74
1 changed files with 3 additions and 3 deletions
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6
drivers/scsi/iscsi_tcp.c
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@ -1774,12 +1774,12 @@ iscsi_conn_set_param(struct iscsi_cls_conn *cls_conn, enum iscsi_param param,
break; break;
case ISCSI_PARAM_MAX_R2T: case ISCSI_PARAM_MAX_R2T:
sscanf(buf, "%d", &value); sscanf(buf, "%d", &value);
if (session->max_r2t == roundup_pow_of_two(value)) if (value <= 0 || !is_power_of_2(value))
return -EINVAL;
if (session->max_r2t == value)
break; break;
iscsi_r2tpool_free(session); iscsi_r2tpool_free(session);
iscsi_set_param(cls_conn, param, buf, buflen); iscsi_set_param(cls_conn, param, buf, buflen);
if (session->max_r2t & (session->max_r2t - 1))
session->max_r2t = roundup_pow_of_two(session->max_r2t);
if (iscsi_r2tpool_alloc(session)) if (iscsi_r2tpool_alloc(session))
return -ENOMEM; return -ENOMEM;
break; break;