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scsi: hisi_sas: Add module parameter for debugfs dump count

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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: Luo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Luo Jiaxing 2019-10-24 22:08:22 +08:00 committed by Martin K. Petersen
parent a70e33eae3
commit 905ab01faf
2 changed files with 14 additions and 3 deletions
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1
drivers/scsi/hisi_sas/hisi_sas.h
View File

@ -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);

16
drivers/scsi/hisi_sas/hisi_sas_main.c
View File

@ -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;
}