From 15052c9e85bf0cdadcb69eb89623bf12bad8b4f8 Mon Sep 17 00:00:00 2001 From: "Kashyap, Desai" Date: Fri, 7 Aug 2009 19:33:17 +0530 Subject: [PATCH] [SCSI] mpt2sas: Introduced check for enclosure_handle to avoid crash Kernel panic is seen because of enclosure_handle received from FW is zero. Check is introduced before calling mpt2sas_config_get_enclosure_pg0. Signed-off-by: Kashyap Desai Signed-off-by: James Bottomley --- drivers/scsi/mpt2sas/mpt2sas_scsih.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c index 2a01a5f2a84d..b1326bf78c9a 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c +++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c @@ -3663,12 +3663,11 @@ _scsih_add_device(struct MPT2SAS_ADAPTER *ioc, u16 handle, u8 phy_num, u8 is_pd) sas_device->hidden_raid_component = is_pd; /* get enclosure_logical_id */ - if (!(mpt2sas_config_get_enclosure_pg0(ioc, &mpi_reply, &enclosure_pg0, - MPI2_SAS_ENCLOS_PGAD_FORM_HANDLE, - sas_device->enclosure_handle))) { + if (sas_device->enclosure_handle && !(mpt2sas_config_get_enclosure_pg0( + ioc, &mpi_reply, &enclosure_pg0, MPI2_SAS_ENCLOS_PGAD_FORM_HANDLE, + sas_device->enclosure_handle))) sas_device->enclosure_logical_id = le64_to_cpu(enclosure_pg0.EnclosureLogicalID); - } /* get device name */ sas_device->device_name = le64_to_cpu(sas_device_pg0.DeviceName); -- 2.39.5