From 3f8d6f2a0797e8c650a47e5c1b5c2601a46f4293 Mon Sep 17 00:00:00 2001
From: James Bottomley <James.Bottomley@HansenPartnership.com>
Date: Wed, 9 Dec 2015 12:56:07 -0800
Subject: [PATCH] ses: fix discovery of SATA devices in SAS enclosures
The current discovery routines use the VPD 0x83 inquiry page to find
the device SAS address and match it to the end point in the enclosure.
This doesn't work for SATA devices because expanders (or hosts) simply
make up an endpoint address for STP and thus the address returned by
the VPD page never matches. Instead of doing this, for SAS attached
devices, match by the direct endpoint address instead.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
---
drivers/scsi/Kconfig | 1 +
drivers/scsi/ses.c | 22 ++++------------------
2 files changed, 5 insertions(+), 18 deletions(-)
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 64eed87d34a878..90cd7cd6d130b1 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -194,6 +194,7 @@ config CHR_DEV_SCH
config SCSI_ENCLOSURE
tristate "SCSI Enclosure Support"
depends on SCSI && ENCLOSURE_SERVICES
+ depends on m || SCSI_SAS_ATTRS != m
help
Enclosures are devices sitting on or in SCSI backplanes that
manage devices. If you have a disk cage, the chances are that
diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c
index 044d06410d4c86..53ef1cb6418e33 100644
--- a/drivers/scsi/ses.c
+++ b/drivers/scsi/ses.c
@@ -34,6 +34,8 @@
#include <scsi/scsi_driver.h>
#include <scsi/scsi_host.h>
+#include <scsi/scsi_transport_sas.h>
+
struct ses_device {
unsigned char *page1;
unsigned char *page1_types;
@@ -579,31 +581,15 @@ static void ses_enclosure_data_process(struct enclosure_device *edev,
static void ses_match_to_enclosure(struct enclosure_device *edev,
struct scsi_device *sdev)
{
- unsigned char *desc;
struct efd efd = {
.addr = 0,
};
ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
- if (!sdev->vpd_pg83_len)
- return;
-
- desc = sdev->vpd_pg83 + 4;
- while (desc < sdev->vpd_pg83 + sdev->vpd_pg83_len) {
- enum scsi_protocol proto = desc[0] >> 4;
- u8 code_set = desc[0] & 0x0f;
- u8 piv = desc[1] & 0x80;
- u8 assoc = (desc[1] & 0x30) >> 4;
- u8 type = desc[1] & 0x0f;
- u8 len = desc[3];
-
- if (piv && code_set == 1 && assoc == 1
- && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
- efd.addr = get_unaligned_be64(&desc[4]);
+ if (is_sas_attached(sdev))
+ efd.addr = sas_get_address(sdev);
- desc += len + 4;
- }
if (efd.addr) {
efd.dev = &sdev->sdev_gendev;
--
GitLab