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[SCSI] be2iscsi: Fix a kernel panic because of TCP RST/FIN received.

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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>
这个提交包含在：
John Soni Jose
2012-08-20 23:00:55 +05:30
提交者 James Bottomley
父节点 6f72238e77
当前提交 0a513dd873
共修改 3 个文件，包含 33 行新增和 43 行删除
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30
drivers/scsi/be2iscsi/be_iscsi.c
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@@ -1254,6 +1254,7 @@ void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
struct beiscsi_endpoint *beiscsi_ep;
struct beiscsi_hba *phba;
unsigned int tag;
uint8_t mgmt_invalidate_flag, tcp_upload_flag;
unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;
beiscsi_ep = ep->dd_data;
@@ -1262,26 +1263,23 @@ void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
"BS_%d : In beiscsi_ep_disconnect for ep_cid = %d\n",
beiscsi_ep->ep_cid);
if (!beiscsi_ep->conn) {
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_ep_disconnect, no "
"beiscsi_ep\n");
return;
if (beiscsi_ep->conn) {
beiscsi_conn = beiscsi_ep->conn;
iscsi_suspend_queue(beiscsi_conn->conn);
mgmt_invalidate_flag = ~BEISCSI_NO_RST_ISSUE;
tcp_upload_flag = CONNECTION_UPLOAD_GRACEFUL;
} else {
mgmt_invalidate_flag = BEISCSI_NO_RST_ISSUE;
tcp_upload_flag = CONNECTION_UPLOAD_ABORT;
}
beiscsi_conn = beiscsi_ep->conn;
iscsi_suspend_queue(beiscsi_conn->conn);
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_ep_disconnect ep_cid = %d\n",
beiscsi_ep->ep_cid);
tag = mgmt_invalidate_connection(phba, beiscsi_ep,
beiscsi_ep->ep_cid, 1,
savecfg_flag);
beiscsi_ep->ep_cid,
mgmt_invalidate_flag,
savecfg_flag);
if (!tag) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : mgmt_invalidate_connection"
" Failed for cid=%d\n",
"BS_%d : mgmt_invalidate_connection Failed for cid=%d\n",
beiscsi_ep->ep_cid);
} else {
wait_event_interruptible(phba->ctrl.mcc_wait[tag],
@@ -1289,7 +1287,7 @@ void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
free_mcc_tag(&phba->ctrl, tag);
}
beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL);
beiscsi_close_conn(beiscsi_ep, tcp_upload_flag);
beiscsi_free_ep(beiscsi_ep);
beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);