Commit 905ab01f authored by Luo Jiaxing's avatar Luo Jiaxing Committed by Martin K. Petersen
Browse files

scsi: hisi_sas: Add module parameter for debugfs dump count 

We still only use dump index #0 however.

Link: https://lore.kernel.org/r/1571926105-74636-16-git-send-email-john.garry@huawei.com


Signed-off-by: default avatarLuo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent a70e33ea

drivers/scsi/hisi_sas/hisi_sas.h

+1 −0
Original line number Diff line number Diff line
@@ -598,6 +598,7 @@ struct hisi_sas_slot_dif_buf_table { 
extern struct scsi_transport_template *hisi_sas_stt;



extern bool hisi_sas_debugfs_enable;

extern u32 hisi_sas_debugfs_dump_count;

extern struct dentry *hisi_sas_debugfs_dir;



extern void hisi_sas_stop_phys(struct hisi_hba *hisi_hba);

drivers/scsi/hisi_sas/hisi_sas_main.c

+13 −3
Original line number Diff line number Diff line
@@ -3819,7 +3819,7 @@ static int hisi_sas_debugfs_alloc(struct hisi_hba *hisi_hba, int dump_index) 


	return 0;

fail:

	for (i = 0; i < HISI_SAS_MAX_DEBUGFS_DUMP; i++)

	for (i = 0; i < hisi_sas_debugfs_dump_count; i++)

		hisi_sas_debugfs_release(hisi_hba, i);

	return -ENOMEM;

}
@@ -3870,7 +3870,7 @@ void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba) 
	hisi_hba->debugfs_dump_dentry =

			debugfs_create_dir("dump", hisi_hba->debugfs_dir);



	for (i = 0; i < HISI_SAS_MAX_DEBUGFS_DUMP; i++) {

	for (i = 0; i < hisi_sas_debugfs_dump_count; i++) {

		if (hisi_sas_debugfs_alloc(hisi_hba, i)) {

			debugfs_remove_recursive(hisi_hba->debugfs_dir);

			dev_dbg(dev, "failed to init debugfs!\n");
@@ -3909,14 +3909,24 @@ EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable); 
module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);

MODULE_PARM_DESC(hisi_sas_debugfs_enable, "Enable driver debugfs (default disabled)");



u32 hisi_sas_debugfs_dump_count = 1;

EXPORT_SYMBOL_GPL(hisi_sas_debugfs_dump_count);

module_param_named(debugfs_dump_count, hisi_sas_debugfs_dump_count, uint, 0444);

MODULE_PARM_DESC(hisi_sas_debugfs_dump_count, "Number of debugfs dumps to allow");



static __init int hisi_sas_init(void)

{

	hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);

	if (!hisi_sas_stt)

		return -ENOMEM;



	if (hisi_sas_debugfs_enable)

	if (hisi_sas_debugfs_enable) {

		hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);

		if (hisi_sas_debugfs_dump_count > HISI_SAS_MAX_DEBUGFS_DUMP) {

			pr_info("hisi_sas: Limiting debugfs dump count\n");

			hisi_sas_debugfs_dump_count = HISI_SAS_MAX_DEBUGFS_DUMP;

		}

	}



	return 0;

}

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