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| author |   Dan Williams <dan.j.williams@intel.com> | 2012-03-12 11:38:26 -0700 |
|---|---|---|
| committer |   James Bottomley <JBottomley@Parallels.com> | 2012-04-23 12:07:25 +0100 |
| commit | ec236e526777ea8825e6e0c3673a40389692eabf (patch) | |
| tree | f066f500296e65563ad70e0913273aa9db8b4705 /drivers/scsi/libsas | |
| parent | [SCSI] libsas: fix sas_find_bcast_phy() in the presence of 'vacant' phys (diff) | |
| download | linux-dev-ec236e526777ea8825e6e0c3673a40389692eabf.tar.xz linux-dev-ec236e526777ea8825e6e0c3673a40389692eabf.zip | |
[SCSI] libsas: fix sas_get_port_device regression
Commit 899fcf4 "[SCSI] libsas: set attached device type and target
protocols for local phys" setup 'phy' to be dereferenced after
list_for_each_entry(phy, &port->phy_list, port_phy_el) (i.e. phy ==
&port->phy_list) resulting in reports like:
BUG: unable to handle kernel NULL pointer dereference at 00000000000002b0
IP: [<ffffffffa00ce948>] sas_discover_domain+0x29e/0x4fb [libsas]
...fix by deferring sas_phy_set_target() to the end of
sas_get_port_device().
Reported-by: Tom Jackson <thomas.p.jackson@intel.com>
Tested-by: Tom Jackson <thomas.p.jackson@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/libsas')
| -rw-r--r-- | drivers/scsi/libsas/sas_discover.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c index c7ac88288bf1..658f16cc2f03 100644 --- a/drivers/scsi/libsas/sas_discover.c +++ b/drivers/scsi/libsas/sas_discover.c @@ -134,10 +134,6 @@ static int sas_get_port_device(struct asd_sas_port *port) return -ENODEV; } - spin_lock_irq(&port->phy_list_lock); - list_for_each_entry(phy, &port->phy_list, port_phy_el) - sas_phy_set_target(phy, dev); - spin_unlock_irq(&port->phy_list_lock); rphy->identify.phy_identifier = phy->phy->identify.phy_identifier; memcpy(dev->sas_addr, port->attached_sas_addr, SAS_ADDR_SIZE); sas_fill_in_rphy(dev, rphy); @@ -164,6 +160,11 @@ static int sas_get_port_device(struct asd_sas_port *port) spin_unlock_irq(&port->dev_list_lock); } + spin_lock_irq(&port->phy_list_lock); + list_for_each_entry(phy, &port->phy_list, port_phy_el) + sas_phy_set_target(phy, dev); + spin_unlock_irq(&port->phy_list_lock); + return 0; } |