From: Jeff Skirvin <jeffrey.d.skirvin@xxxxxxxxx> The discovery function "sas_rediscover_dev" had two bugs: 1) it did not pay attention to the return status from the SMP task execution; 2) the stack variable used for the returned SAS address was compared against 0 without being initialized. Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@xxxxxxxxx> [djbw: todo sanitize smp_execute_task return values (see: residue)] Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> --- drivers/scsi/libsas/sas_expander.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index f1e8e0a..63d3e59 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -2005,6 +2005,7 @@ static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last) u8 sas_addr[8]; int res; + memset(sas_addr, 0, 8); res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type); switch (res) { case SMP_RESP_NO_PHY: @@ -2017,9 +2018,13 @@ static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last) return res; case SMP_RESP_FUNC_ACC: break; + case -ECOMM: + break; + default: + return res; } - if (SAS_ADDR(sas_addr) == 0) { + if ((SAS_ADDR(sas_addr) == 0) || (res == -ECOMM)) { phy->phy_state = PHY_EMPTY; sas_unregister_devs_sas_addr(dev, phy_id, last); return res; -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html