This is a note to let you know that I've just added the patch titled
scsi: libsas: Fix disk not being scanned in after being removed
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-libsas-fix-disk-not-being-scanned-in-after-bein.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit cf25330b61d2c9d4a3879e831dfa9c0a7e2411b4
Author: Xingui Yang <yangxingui@xxxxxxxxxx>
Date: Thu Mar 7 14:14:13 2024 +0000
scsi: libsas: Fix disk not being scanned in after being removed
[ Upstream commit 8e68a458bcf5b5cb9c3624598bae28f08251601f ]
As of commit d8649fc1c5e4 ("scsi: libsas: Do discovery on empty PHY to
update PHY info"), do discovery will send a new SMP_DISCOVER and update
phy->phy_change_count. We found that if the disk is reconnected and phy
change_count changes at this time, the disk scanning process will not be
triggered.
Therefore, call sas_set_ex_phy() to update the PHY info with the results of
the last query. And because the previous phy info will be used when calling
sas_unregister_devs_sas_addr(), sas_unregister_devs_sas_addr() should be
called before sas_set_ex_phy().
Fixes: d8649fc1c5e4 ("scsi: libsas: Do discovery on empty PHY to update PHY info")
Signed-off-by: Xingui Yang <yangxingui@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240307141413.48049-3-yangxingui@xxxxxxxxxx
Reviewed-by: John Garry <john.g.garry@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 8c7c970274c9c..988c0db37458d 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -2046,37 +2046,46 @@ static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last)
struct expander_device *ex = &dev->ex_dev;
struct ex_phy *phy = &ex->ex_phy[phy_id];
enum sas_device_type type = SAS_PHY_UNUSED;
+ struct smp_disc_resp *disc_resp;
u8 sas_addr[SAS_ADDR_SIZE];
int res;
memset(sas_addr, 0, SAS_ADDR_SIZE);
- res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type);
+ disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
+ if (!disc_resp)
+ return -ENOMEM;
+
+ res = sas_get_phy_discover(dev, phy_id, disc_resp);
switch (res) {
case SMP_RESP_NO_PHY:
phy->phy_state = PHY_NOT_PRESENT;
sas_unregister_devs_sas_addr(dev, phy_id, last);
- return res;
+ goto out_free_resp;
case SMP_RESP_PHY_VACANT:
phy->phy_state = PHY_VACANT;
sas_unregister_devs_sas_addr(dev, phy_id, last);
- return res;
+ goto out_free_resp;
case SMP_RESP_FUNC_ACC:
break;
case -ECOMM:
break;
default:
- return res;
+ goto out_free_resp;
}
+ if (res == 0)
+ sas_get_sas_addr_and_dev_type(disc_resp, sas_addr, &type);
+
if ((SAS_ADDR(sas_addr) == 0) || (res == -ECOMM)) {
phy->phy_state = PHY_EMPTY;
sas_unregister_devs_sas_addr(dev, phy_id, last);
/*
- * Even though the PHY is empty, for convenience we discover
- * the PHY to update the PHY info, like negotiated linkrate.
+ * Even though the PHY is empty, for convenience we update
+ * the PHY info, like negotiated linkrate.
*/
- sas_ex_phy_discover(dev, phy_id);
- return res;
+ if (res == 0)
+ sas_set_ex_phy(dev, phy_id, disc_resp);
+ goto out_free_resp;
} else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) &&
dev_type_flutter(type, phy->attached_dev_type)) {
struct domain_device *ata_dev = sas_ex_to_ata(dev, phy_id);
@@ -2088,7 +2097,7 @@ static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last)
action = ", needs recovery";
SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter%s\n",
SAS_ADDR(dev->sas_addr), phy_id, action);
- return res;
+ goto out_free_resp;
}
/* we always have to delete the old device when we went here */
@@ -2097,7 +2106,10 @@ static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last)
SAS_ADDR(phy->attached_sas_addr));
sas_unregister_devs_sas_addr(dev, phy_id, last);
- return sas_discover_new(dev, phy_id);
+ res = sas_discover_new(dev, phy_id);
+out_free_resp:
+ kfree(disc_resp);
+ return res;
}
/**
