Re: [PATCH] scsi: hisi_sas: display correct proc_name in sysfs

[Jason Yan]

在 2020/5/12 16:23, John Garry 写道:
On 12/05/2020 07:33, Jason Yan wrote:
The 'proc_name' entry in sysfs for hisi_sas is 'null' now becuase it is
not initialized in scsi_host_template. It looks like:

[root@localhost ~]# cat /sys/class/scsi_host/host2/proc_name
(null)


hmmm.. it would be good to tell us what this buys us, apart from the 
proc_name file.


When there is more than one storage cards(or controllers) in the system, 
I'm tring to find out which host is belong to which card. And then I 
found this in scsi_host in sysfs but the output is '(null)' which is odd.

I mean, if we had the sht show_info method implemented, then it could be 
useful (which is even marked as obsolete now).


I found this is interesting while in the sysfs filesystem we have a 
procfs stuff in it. I was planned to rename this entry to 'name' and use 
the struct member 'name' directly in struct scsi_host_template. But this 
may break userspace applications.

Thanks,
John

While the other driver's entry looks like:

linux-vnMQMU:~ # cat /sys/class/scsi_host/host0/proc_name
megaraid_sas

Cc: John Garry <john.ga...@huawei.com>
Cc: Xiang Chen <chenxian...@hisilicon.com>
Signed-off-by: Jason Yan <yanai...@huawei.com>
---
  drivers/scsi/hisi_sas/hisi_sas_v1_hw.c | 1 +
  drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 1 +
  drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 1 +
  3 files changed, 3 insertions(+)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c 
b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
index fa25766502a2..c205bff20943 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
@@ -1757,6 +1757,7 @@ static struct device_attribute 
*host_attrs_v1_hw[] = {
  static struct scsi_host_template sht_v1_hw = {
      .name            = DRV_NAME,
+    .proc_name        = DRV_NAME,
      .module            = THIS_MODULE,
      .queuecommand        = sas_queuecommand,
      .target_alloc        = sas_target_alloc,
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c 
b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index e05faf315dcd..c725cffe141e 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -3533,6 +3533,7 @@ static struct device_attribute 
*host_attrs_v2_hw[] = {
  static struct scsi_host_template sht_v2_hw = {
      .name            = DRV_NAME,
+    .proc_name        = DRV_NAME,
      .module            = THIS_MODULE,
      .queuecommand        = sas_queuecommand,
      .target_alloc        = sas_target_alloc,
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c 
b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 374885aa8d77..59b1421607dd 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -3071,6 +3071,7 @@ static int debugfs_set_bist_v3_hw(struct 
hisi_hba *hisi_hba, bool enable)
  static struct scsi_host_template sht_v3_hw = {
      .name            = DRV_NAME,
+    .proc_name        = DRV_NAME,
      .module            = THIS_MODULE,
      .queuecommand        = sas_queuecommand,
      .target_alloc        = sas_target_alloc,



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