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authorBoaz Harrosh <bharrosh@panasas.com>2007-12-13 12:43:22 -0600
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-01-11 18:28:22 -0600
commit7207fea452cfdd2d4e2f4419e2c31f570edbade3 (patch)
treed240295f67ad9286295516dabc9949d5d3739700 /drivers/scsi/iscsi_tcp.c
parentda32dd681f7a1a17073c42b375fc23cf73c92155 (diff)
downloadop-kernel-dev-7207fea452cfdd2d4e2f4419e2c31f570edbade3.zip
op-kernel-dev-7207fea452cfdd2d4e2f4419e2c31f570edbade3.tar.gz
[SCSI] iscsi: Prettify resid handling and some extra checks
- Check to see that OVERFLOW is not negative indicating a bug. - Unify handling of UNDERFLOW and OVERFLOW to the same code. - Also handle BIDI_OVERFLOW. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/iscsi_tcp.c')
-rw-r--r--drivers/scsi/iscsi_tcp.c16
1 files changed, 7 insertions, 9 deletions
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 1b540e0..fd88777 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -507,22 +507,20 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
}
if (rhdr->flags & ISCSI_FLAG_DATA_STATUS) {
+ sc->result = (DID_OK << 16) | rhdr->cmd_status;
conn->exp_statsn = be32_to_cpu(rhdr->statsn) + 1;
- if (rhdr->flags & ISCSI_FLAG_DATA_UNDERFLOW) {
+ if (rhdr->flags & (ISCSI_FLAG_DATA_UNDERFLOW |
+ ISCSI_FLAG_DATA_OVERFLOW)) {
int res_count = be32_to_cpu(rhdr->residual_count);
if (res_count > 0 &&
- res_count <= scsi_bufflen(sc)) {
+ (rhdr->flags & ISCSI_FLAG_CMD_OVERFLOW ||
+ res_count <= scsi_bufflen(sc)))
scsi_set_resid(sc, res_count);
- sc->result = (DID_OK << 16) | rhdr->cmd_status;
- } else
+ else
sc->result = (DID_BAD_TARGET << 16) |
rhdr->cmd_status;
- } else if (rhdr->flags & ISCSI_FLAG_DATA_OVERFLOW) {
- scsi_set_resid(sc, be32_to_cpu(rhdr->residual_count));
- sc->result = (DID_OK << 16) | rhdr->cmd_status;
- } else
- sc->result = (DID_OK << 16) | rhdr->cmd_status;
+ }
}
conn->datain_pdus_cnt++;
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