[02/13] scsi: hisi_sas: Create trigger_dump at the end of the debugfs initialization

Commit Message

Yihang Li Sept. 26, 2024, 1:43 a.m. UTC

In the current debugfs initialization process, the interface trigger_dump
is created first, and then the dump directory is created to store the
register dump information.

The issue is that after the trigger_dump interface is created, users can
access the interface to trigger dump and call debugfs_create_files_v3_hw().
In debugfs_create_files_v3_hw(), if .debugfs_dump_dentry is NULL, the file
for storing dump information is created under /sys/kernel/debug, and the
memory and information cannot be released after the driver is uninstalled.

Therefore, the creation of the trigger_dump interface is placed at the end
of debugfs initialization.

Signed-off-by: Yihang Li <[e-mail]>
Reviewed-by: Xiang Chen <[e-mail]>
---
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

Patch

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 63a7255d2994..980f28d7b87f 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -4755,11 +4755,6 @@  static void debugfs_init_v3_hw(struct hisi_hba *hisi_hba)
 
 	hisi_hba->debugfs_dir = debugfs_create_dir(dev_name(dev),
 						   hisi_sas_debugfs_dir);
-	debugfs_create_file("trigger_dump", 0200,
-			    hisi_hba->debugfs_dir,
-			    hisi_hba,
-			    &debugfs_trigger_dump_v3_hw_fops);
-
 	/* create bist structures */
 	debugfs_bist_init_v3_hw(hisi_hba);
 
@@ -4768,6 +4763,10 @@  static void debugfs_init_v3_hw(struct hisi_hba *hisi_hba)
 
 	debugfs_phy_down_cnt_init_v3_hw(hisi_hba);
 	debugfs_fifo_init_v3_hw(hisi_hba);
+	debugfs_create_file("trigger_dump", 0200,
+			    hisi_hba->debugfs_dir,
+			    hisi_hba,
+			    &debugfs_trigger_dump_v3_hw_fops);
 }
 
 static int