scsi: qedi: fix build error without DEBUG_FS

Without CONFIG_DEBUG_FS, we run into a link error:

drivers/scsi/qedi/qedi_iscsi.o: In function `qedi_ep_poll':
qedi_iscsi.c:(.text.qedi_ep_poll+0x134): undefined reference to `do_not_recover'
drivers/scsi/qedi/qedi_iscsi.o: In function `qedi_ep_disconnect':
qedi_iscsi.c:(.text.qedi_ep_disconnect+0x36c): undefined reference to `do_not_recover'
drivers/scsi/qedi/qedi_iscsi.o: In function `qedi_ep_connect':
qedi_iscsi.c:(.text.qedi_ep_connect+0x350): undefined reference to `do_not_recover'
drivers/scsi/qedi/qedi_fw.o: In function `qedi_tmf_work':
qedi_fw.c:(.text.qedi_tmf_work+0x3b4): undefined reference to `do_not_recover'

This defines the symbol as a constant in this case, as there is no way to
set it to anything other than zero without DEBUG_FS. In addition, I'm renaming
it to qedi_do_not_recover in order to put it into a driver specific namespace,
as "do_not_recover" is a really bad name for a kernel-wide global identifier
when it is used only in one driver.

Fixes: ace7f46ba5fd ("scsi: qedi: Add QLogic FastLinQ offload iSCSI driver framework.")
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Manish Rangankar <Manish.Rangankar@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

4 files changed, 21 insertions, 15 deletions

diff --git a/drivers/scsi/qedi/qedi_debugfs.c b/drivers/scsi/qedi/qedi_debugfs.c
index 955936274241..59417199bf36 100644
--- a/drivers/scsi/qedi/qedi_debugfs.c
+++ b/drivers/scsi/qedi/qedi_debugfs.c
@@ -14,7 +14,7 @@
 #include <linux/debugfs.h>
 #include <linux/module.h>
 
-int do_not_recover;
+int qedi_do_not_recover;
 static struct dentry *qedi_dbg_root;
 
 void
@@ -74,22 +74,22 @@ qedi_dbg_exit(void)
 static ssize_t
 qedi_dbg_do_not_recover_enable(struct qedi_dbg_ctx *qedi_dbg)
 {
-        if (!do_not_recover)
-                do_not_recover = 1;
+        if (!qedi_do_not_recover)
+                qedi_do_not_recover = 1;
 
         QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
-                  do_not_recover);
+                  qedi_do_not_recover);
         return 0;
 }
 
 static ssize_t
 qedi_dbg_do_not_recover_disable(struct qedi_dbg_ctx *qedi_dbg)
 {
-        if (do_not_recover)
-                do_not_recover = 0;
+        if (qedi_do_not_recover)
+                qedi_do_not_recover = 0;
 
         QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
-                  do_not_recover);
+                  qedi_do_not_recover);
         return 0;
 }
 
@@ -141,7 +141,7 @@ qedi_dbg_do_not_recover_cmd_read(struct file *filp, char __user *buffer,
         if (*ppos)
                 return 0;
 
-        cnt = sprintf(buffer, "do_not_recover=%d\n", do_not_recover);
+        cnt = sprintf(buffer, "do_not_recover=%d\n", qedi_do_not_recover);
         cnt = min_t(int, count, cnt - *ppos);
         *ppos += cnt;
         return cnt;
diff --git a/drivers/scsi/qedi/qedi_fw.c b/drivers/scsi/qedi/qedi_fw.c
index c9f0ef4e11b3..2bce3efc66a4 100644
--- a/drivers/scsi/qedi/qedi_fw.c
+++ b/drivers/scsi/qedi/qedi_fw.c
@@ -1461,9 +1461,9 @@ static void qedi_tmf_work(struct work_struct *work)
                   get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
                   qedi_conn->iscsi_conn_id);
 
-        if (do_not_recover) {
+        if (qedi_do_not_recover) {
                 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
-                         do_not_recover);
+                         qedi_do_not_recover);
                 goto abort_ret;
         }
 
diff --git a/drivers/scsi/qedi/qedi_gbl.h b/drivers/scsi/qedi/qedi_gbl.h
index 8e488de88ece..63d793f46064 100644
--- a/drivers/scsi/qedi/qedi_gbl.h
+++ b/drivers/scsi/qedi/qedi_gbl.h
@@ -12,8 +12,14 @@
 
 #include "qedi_iscsi.h"
 
+#ifdef CONFIG_DEBUG_FS
+extern int qedi_do_not_recover;
+#else
+#define qedi_do_not_recover (0)
+#endif
+
 extern uint qedi_io_tracing;
-extern int do_not_recover;
+
 extern struct scsi_host_template qedi_host_template;
 extern struct iscsi_transport qedi_iscsi_transport;
 extern const struct qed_iscsi_ops *qedi_ops;
diff --git a/drivers/scsi/qedi/qedi_iscsi.c b/drivers/scsi/qedi/qedi_iscsi.c
index b9f79d36142d..4cc474364c50 100644
--- a/drivers/scsi/qedi/qedi_iscsi.c
+++ b/drivers/scsi/qedi/qedi_iscsi.c
@@ -833,7 +833,7 @@ qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
                 return ERR_PTR(ret);
         }
 
-        if (do_not_recover) {
+        if (qedi_do_not_recover) {
                 ret = -ENOMEM;
                 return ERR_PTR(ret);
         }
@@ -957,7 +957,7 @@ static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
         struct qedi_endpoint *qedi_ep;
         int ret = 0;
 
-        if (do_not_recover)
+        if (qedi_do_not_recover)
                 return 1;
 
         qedi_ep = ep->dd_data;
@@ -1025,7 +1025,7 @@ static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
                 }
 
                 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
-                        if (do_not_recover) {
+                        if (qedi_do_not_recover) {
                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
                                           "Do not recover cid=0x%x\n",
                                           qedi_ep->iscsi_cid);
@@ -1039,7 +1039,7 @@ static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
                 }
         }
 
-        if (do_not_recover)
+        if (qedi_do_not_recover)
                 goto ep_exit_recover;
 
         switch (qedi_ep->state) {