scsi: lpfc: Fix the NULL vs IS_ERR() bug for debugfs_create_file()

Since debugfs_create_file() returns ERR_PTR and never NULL, use IS_ERR() to
check the return value.

Fixes: 2fcbc569b9f5 ("scsi: lpfc: Make debugfs ktime stats generic for NVME and SCSI")
Fixes: 4c47efc140fa ("scsi: lpfc: Move SCSI and NVME Stats to hardware queue structures")
Fixes: 6a828b0f6192 ("scsi: lpfc: Support non-uniform allocation of MSIX vectors to hardware queues")
Fixes: 95bfc6d8ad86 ("scsi: lpfc: Make FW logging dynamically configurable")
Fixes: 9f77870870d8 ("scsi: lpfc: Add debugfs support for cm framework buffers")
Fixes: c490850a0947 ("scsi: lpfc: Adapt partitioned XRI lists to efficient sharing")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Link: https://lore.kernel.org/r/20230906030809.2847970-1-ruanjinjie@huawei.com
Reviewed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c
index 7f9b221..ea9b422 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_debugfs.c
+++ b/drivers/scsi/lpfc/lpfc_debugfs.c
@@ -6073,7 +6073,7 @@ lpfc_debugfs_initialize(struct lpfc_vport *vport)
                                            phba->hba_debugfs_root,
                                            phba,
                                            &lpfc_debugfs_op_multixripools);
-               if (!phba->debug_multixri_pools) {
+               if (IS_ERR(phba->debug_multixri_pools)) {
                        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                         "0527 Cannot create debugfs multixripools\n");
                        goto debug_failed;
@@ -6085,7 +6085,7 @@ lpfc_debugfs_initialize(struct lpfc_vport *vport)
                        debugfs_create_file(name, S_IFREG | 0644,
                                            phba->hba_debugfs_root,
                                            phba, &lpfc_cgn_buffer_op);
-               if (!phba->debug_cgn_buffer) {
+               if (IS_ERR(phba->debug_cgn_buffer)) {
                        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                         "6527 Cannot create debugfs "
                                         "cgn_buffer\n");
@@ -6098,7 +6098,7 @@ lpfc_debugfs_initialize(struct lpfc_vport *vport)
                        debugfs_create_file(name, S_IFREG | 0644,
                                            phba->hba_debugfs_root,
                                            phba, &lpfc_rx_monitor_op);
-               if (!phba->debug_rx_monitor) {
+               if (IS_ERR(phba->debug_rx_monitor)) {
                        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                         "6528 Cannot create debugfs "
                                         "rx_monitor\n");
@@ -6111,7 +6111,7 @@ lpfc_debugfs_initialize(struct lpfc_vport *vport)
                        debugfs_create_file(name, 0644,
                                            phba->hba_debugfs_root,
                                            phba, &lpfc_debugfs_ras_log);
-               if (!phba->debug_ras_log) {
+               if (IS_ERR(phba->debug_ras_log)) {
                        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                         "6148 Cannot create debugfs"
                                         " ras_log\n");
@@ -6132,7 +6132,7 @@ lpfc_debugfs_initialize(struct lpfc_vport *vport)
                        debugfs_create_file(name, S_IFREG | 0644,
                                            phba->hba_debugfs_root,
                                            phba, &lpfc_debugfs_op_lockstat);
-               if (!phba->debug_lockstat) {
+               if (IS_ERR(phba->debug_lockstat)) {
                        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                         "4610 Can't create debugfs lockstat\n");
                        goto debug_failed;
@@ -6358,7 +6358,7 @@ nvmeio_off:
                debugfs_create_file(name, 0644,
                                    vport->vport_debugfs_root,
                                    vport, &lpfc_debugfs_op_scsistat);
-       if (!vport->debug_scsistat) {
+       if (IS_ERR(vport->debug_scsistat)) {
                lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                 "4611 Cannot create debugfs scsistat\n");
                goto debug_failed;
@@ -6369,7 +6369,7 @@ nvmeio_off:
                debugfs_create_file(name, 0644,
                                    vport->vport_debugfs_root,
                                    vport, &lpfc_debugfs_op_ioktime);
-       if (!vport->debug_ioktime) {
+       if (IS_ERR(vport->debug_ioktime)) {
                lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                 "0815 Cannot create debugfs ioktime\n");
                goto debug_failed;