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[SCSI] mpt2sas: Introduced check for enclosure_handle to avoid crash

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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 <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Kashyap, Desai 2009-08-07 19:33:17 +05:30 committed by James Bottomley
parent 3493e84de6
commit 15052c9e85
1 changed files with 3 additions and 4 deletions
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7
drivers/scsi/mpt2sas/mpt2sas_scsih.c
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@ -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);