[SCSI] be2iscsi: Fix a kernel panic because of TCP RST/FIN received.
A TCP RST/FIN can be received even before the connection specific
structures are initialized.This fix checks for the conn structure
is intialized or not when RST/FIN is received.
Signed-off-by: John Soni Jose <sony.john-n@emulex.com>
Signed-off-by: Jayamohan Kallickal <jayamohan.kallickal@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 5637058..ff73f95 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -42,6 +42,7 @@
#include "be_main.h"
#include "be_iscsi.h"
#include "be_mgmt.h"
+#include "be_cmds.h"
static unsigned int be_iopoll_budget = 10;
static unsigned int be_max_phys_size = 64;
@@ -1920,6 +1921,7 @@
struct dmsg_cqe *dmsg;
unsigned int num_processed = 0;
unsigned int tot_nump = 0;
+ unsigned short code = 0, cid = 0;
struct beiscsi_conn *beiscsi_conn;
struct beiscsi_endpoint *beiscsi_ep;
struct iscsi_endpoint *ep;
@@ -1933,10 +1935,11 @@
CQE_VALID_MASK) {
be_dws_le_to_cpu(sol, sizeof(struct sol_cqe));
- ep = phba->ep_array[(u32) ((sol->
- dw[offsetof(struct amap_sol_cqe, cid) / 32] &
- SOL_CID_MASK) >> 6) -
- phba->fw_config.iscsi_cid_start];
+ cid = ((sol->dw[offsetof(struct amap_sol_cqe, cid)/32] &
+ CQE_CID_MASK) >> 6);
+ code = (sol->dw[offsetof(struct amap_sol_cqe, code)/32] &
+ CQE_CODE_MASK);
+ ep = phba->ep_array[cid - phba->fw_config.iscsi_cid_start];
beiscsi_ep = ep->dd_data;
beiscsi_conn = beiscsi_ep->conn;
@@ -1948,8 +1951,7 @@
num_processed = 0;
}
- switch ((u32) sol->dw[offsetof(struct amap_sol_cqe, code) /
- 32] & CQE_CODE_MASK) {
+ switch (code) {
case SOL_CMD_COMPLETE:
hwi_complete_cmd(beiscsi_conn, phba, sol);
break;
@@ -1996,11 +1998,7 @@
beiscsi_log(phba, KERN_ERR,
BEISCSI_LOG_CONFIG | BEISCSI_LOG_IO,
"BM_%d : CQ Error notification for cmd.. "
- "code %d cid 0x%x\n",
- sol->dw[offsetof(struct amap_sol_cqe,
- code) / 32] & CQE_CODE_MASK,
- sol->dw[offsetof(struct amap_sol_cqe,
- cid) / 32] & SOL_CID_MASK);
+ "code %d cid 0x%x\n", code, cid);
break;
case UNSOL_DATA_DIGEST_ERROR_NOTIFY:
beiscsi_log(phba, KERN_ERR,
@@ -2027,12 +2025,10 @@
beiscsi_log(phba, KERN_ERR,
BEISCSI_LOG_IO | BEISCSI_LOG_CONFIG,
"BM_%d : CQ Error %d, reset CID 0x%x...\n",
- sol->dw[offsetof(struct amap_sol_cqe,
- code) / 32] & CQE_CODE_MASK,
- sol->dw[offsetof(struct amap_sol_cqe,
- cid) / 32] & CQE_CID_MASK);
- iscsi_conn_failure(beiscsi_conn->conn,
- ISCSI_ERR_CONN_FAILED);
+ code, cid);
+ if (beiscsi_conn)
+ iscsi_conn_failure(beiscsi_conn->conn,
+ ISCSI_ERR_CONN_FAILED);
break;
case CXN_KILLED_RST_SENT:
case CXN_KILLED_RST_RCVD:
@@ -2040,22 +2036,17 @@
BEISCSI_LOG_IO | BEISCSI_LOG_CONFIG,
"BM_%d : CQ Error %d, reset"
"received/sent on CID 0x%x...\n",
- sol->dw[offsetof(struct amap_sol_cqe,
- code) / 32] & CQE_CODE_MASK,
- sol->dw[offsetof(struct amap_sol_cqe,
- cid) / 32] & CQE_CID_MASK);
- iscsi_conn_failure(beiscsi_conn->conn,
- ISCSI_ERR_CONN_FAILED);
+ code, cid);
+ if (beiscsi_conn)
+ iscsi_conn_failure(beiscsi_conn->conn,
+ ISCSI_ERR_CONN_FAILED);
break;
default:
beiscsi_log(phba, KERN_ERR,
BEISCSI_LOG_IO | BEISCSI_LOG_CONFIG,
"BM_%d : CQ Error Invalid code= %d "
"received on CID 0x%x...\n",
- sol->dw[offsetof(struct amap_sol_cqe,
- code) / 32] & CQE_CODE_MASK,
- sol->dw[offsetof(struct amap_sol_cqe,
- cid) / 32] & CQE_CID_MASK);
+ code, cid);
break;
}