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| author | Mike Christie <michaelc@cs.wisc.edu> | 2007-12-13 12:43:40 -0600 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-11 18:28:50 -0600 |
| commit | 4545a88fc1ae2c0cd1da6e35f3adcbc56ff27b07 (patch) | |
| tree | c5c01dcb6c1a82b314b6cba8f04802e9638a5b9b /drivers/scsi/iscsi_tcp.c | |
| parent | 66bbe0ce11c7ebe20cd1d4b5d271b2e124e223c5 (diff) | |
| download | lwn-4545a88fc1ae2c0cd1da6e35f3adcbc56ff27b07.tar.gz lwn-4545a88fc1ae2c0cd1da6e35f3adcbc56ff27b07.zip | |
[SCSI] iscsi_tcp: hold lock during data rsp processing
iscsi_data_rsp needs to hold the sesison lock when it calls
iscsi_update_cmdsn.
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.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c index 84c4a5026bcb..edebdf27af9b 100644 --- a/drivers/scsi/iscsi_tcp.c +++ b/drivers/scsi/iscsi_tcp.c @@ -641,13 +641,11 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) } /* fill-in new R2T associated with the task */ - spin_lock(&session->lock); iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr); if (!ctask->sc || session->state != ISCSI_STATE_LOGGED_IN) { printk(KERN_INFO "iscsi_tcp: dropping R2T itt %d in " "recovery...\n", ctask->itt); - spin_unlock(&session->lock); return 0; } @@ -660,7 +658,6 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) printk(KERN_ERR "iscsi_tcp: invalid R2T with zero data len\n"); __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t, sizeof(void*)); - spin_unlock(&session->lock); return ISCSI_ERR_DATALEN; } @@ -676,7 +673,6 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) r2t->data_offset, scsi_bufflen(ctask->sc)); __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t, sizeof(void*)); - spin_unlock(&session->lock); return ISCSI_ERR_DATALEN; } @@ -690,8 +686,6 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) conn->r2t_pdus_cnt++; iscsi_requeue_ctask(ctask); - spin_unlock(&session->lock); - return 0; } @@ -764,7 +758,9 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) switch(opcode) { case ISCSI_OP_SCSI_DATA_IN: ctask = session->cmds[itt]; + spin_lock(&conn->session->lock); rc = iscsi_data_rsp(conn, ctask); + spin_unlock(&conn->session->lock); if (rc) return rc; if (tcp_conn->in.datalen) { @@ -806,9 +802,11 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr) ctask = session->cmds[itt]; if (ahslen) rc = ISCSI_ERR_AHSLEN; - else if (ctask->sc->sc_data_direction == DMA_TO_DEVICE) + else if (ctask->sc->sc_data_direction == DMA_TO_DEVICE) { + spin_lock(&session->lock); rc = iscsi_r2t_rsp(conn, ctask); - else + spin_unlock(&session->lock); + } else rc = ISCSI_ERR_PROTO; break; case ISCSI_OP_LOGIN_RSP: |