redonkable/alistair23-linux
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[SCSI] bfa: protect idr using bfad_mutex

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idr is a global resource, protect it with global bfad_mutex.

Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Jing Huang 2010-03-19 11:07:09 -07:00 committed by James Bottomley
parent b3522f08ec
commit 42b426ecb4
3 changed files with 11 additions and 5 deletions
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2
drivers/scsi/bfa/bfad.c
View file

@ -33,7 +33,7 @@
#include <fcb/bfa_fcb.h>
BFA_TRC_FILE(LDRV, BFAD);
static DEFINE_MUTEX(bfad_mutex);
DEFINE_MUTEX(bfad_mutex);
LIST_HEAD(bfad_list);
static int bfad_inst;
int bfad_supported_fc4s;

1
drivers/scsi/bfa/bfad_drv.h
View file

@ -293,5 +293,6 @@ extern struct list_head bfad_list;
extern int bfa_lun_queue_depth;
extern int bfad_supported_fc4s;
extern int bfa_linkup_delay;
extern struct mutex bfad_mutex;
#endif /* __BFAD_DRV_H__ */

13
drivers/scsi/bfa/bfad_im.c
View file

@ -518,7 +518,9 @@ bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
{
int error = 1;
mutex_lock(&bfad_mutex);
if (!idr_pre_get(&bfad_im_port_index, GFP_KERNEL)) {
mutex_unlock(&bfad_mutex);
printk(KERN_WARNING "idr_pre_get failure\n");
goto out;
}
@ -526,10 +528,13 @@ bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
error = idr_get_new(&bfad_im_port_index, im_port,
&im_port->idr_id);
if (error) {
mutex_unlock(&bfad_mutex);
printk(KERN_WARNING "idr_get_new failure\n");
goto out;
}
mutex_unlock(&bfad_mutex);
im_port->shost = bfad_os_scsi_host_alloc(im_port, bfad);
if (!im_port->shost) {
error = 1;
@ -563,7 +568,9 @@ bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
out_fc_rel:
scsi_host_put(im_port->shost);
out_free_idr:
mutex_lock(&bfad_mutex);
idr_remove(&bfad_im_port_index, im_port->idr_id);
mutex_unlock(&bfad_mutex);
out:
return error;
}
@ -571,8 +578,6 @@ out:
void
bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
{
unsigned long flags;
bfa_trc(bfad, bfad->inst_no);
bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_HOST_FREE,
im_port->shost->host_no);
@ -582,9 +587,9 @@ bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
scsi_remove_host(im_port->shost);
scsi_host_put(im_port->shost);
spin_lock_irqsave(&bfad->bfad_lock, flags);
mutex_lock(&bfad_mutex);
idr_remove(&bfad_im_port_index, im_port->idr_id);
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
mutex_unlock(&bfad_mutex);
}
static void