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[SCSI] zfcp: Improve ELS ADISC handling 

Introduce kmem_cache for ELS ADISC data to guarantee the required
hardware alignment and free the allocated memory in case the send
failes.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Christof Schmitt 2009-11-24 16:54:14 +01:00 committed by James Bottomley
parent 7c7dc19681
commit ee744622c6
3 changed files with 17 additions and 3 deletions
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8
drivers/s390/scsi/zfcp_aux.c
View File

@ -179,6 +179,11 @@ static int __init zfcp_module_init(void)
if (!zfcp_data.gid_pn_cache)
goto out_gid_cache;
zfcp_data.adisc_cache = zfcp_cache_hw_align("zfcp_adisc",
sizeof(struct zfcp_fc_els_adisc));
if (!zfcp_data.adisc_cache)
goto out_adisc_cache;
zfcp_data.scsi_transport_template =
fc_attach_transport(&zfcp_transport_functions);
if (!zfcp_data.scsi_transport_template)
@ -206,6 +211,8 @@ out_ccw_register:
out_misc:
fc_release_transport(zfcp_data.scsi_transport_template);
out_transport:
kmem_cache_destroy(zfcp_data.adisc_cache);
out_adisc_cache:
kmem_cache_destroy(zfcp_data.gid_pn_cache);
out_gid_cache:
kmem_cache_destroy(zfcp_data.sr_buffer_cache);
@ -224,6 +231,7 @@ static void __exit zfcp_module_exit(void)
ccw_driver_unregister(&zfcp_ccw_driver);
misc_deregister(&zfcp_cfdc_misc);
fc_release_transport(zfcp_data.scsi_transport_template);
kmem_cache_destroy(zfcp_data.adisc_cache);
kmem_cache_destroy(zfcp_data.gid_pn_cache);
kmem_cache_destroy(zfcp_data.sr_buffer_cache);
kmem_cache_destroy(zfcp_data.qtcb_cache);

1
drivers/s390/scsi/zfcp_def.h
View File

@ -347,6 +347,7 @@ struct zfcp_data {
struct kmem_cache *qtcb_cache;
struct kmem_cache *sr_buffer_cache;
struct kmem_cache *gid_pn_cache;
struct kmem_cache *adisc_cache;
};
/********************** ZFCP SPECIFIC DEFINES ********************************/

11
drivers/s390/scsi/zfcp_fc.c
View File

@ -389,15 +389,16 @@ static void zfcp_fc_adisc_handler(void *data)
out:
atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
put_device(&port->sysfs_device);
kfree(adisc);
kmem_cache_free(zfcp_data.adisc_cache, adisc);
}
static int zfcp_fc_adisc(struct zfcp_port *port)
{
struct zfcp_fc_els_adisc *adisc;
struct zfcp_adapter *adapter = port->adapter;
int ret;
adisc = kzalloc(sizeof(struct zfcp_fc_els_adisc), GFP_ATOMIC);
adisc = kmem_cache_alloc(zfcp_data.adisc_cache, GFP_ATOMIC);
if (!adisc)
return -ENOMEM;
@ -420,7 +421,11 @@ static int zfcp_fc_adisc(struct zfcp_port *port)
hton24(adisc->adisc_req.adisc_port_id,
fc_host_port_id(adapter->scsi_host));
return zfcp_fsf_send_els(adapter, port->d_id, &adisc->els);
ret = zfcp_fsf_send_els(adapter, port->d_id, &adisc->els);
if (ret)
kmem_cache_free(zfcp_data.adisc_cache, adisc);
return ret;
}
void zfcp_fc_link_test_work(struct work_struct *work)