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| author | Jing Huang <huangj@brocade.com> | 2010-03-19 11:07:09 -0700 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-04-11 09:24:20 -0500 |
| commit | 42b426ecb453cf49c3d16cf1d7a5e5d8cab9869d (patch) | |
| tree | 42ca564f37e62c7797cea8816ac934e5347ea757 /drivers | |
| parent | b3522f08ec7011aed0abc477bfedd00d189e9cd6 (diff) | |
| download | linux-stable-42b426ecb453cf49c3d16cf1d7a5e5d8cab9869d.tar.gz linux-stable-42b426ecb453cf49c3d16cf1d7a5e5d8cab9869d.tar.bz2 linux-stable-42b426ecb453cf49c3d16cf1d7a5e5d8cab9869d.zip | |
[SCSI] bfa: protect idr using bfad_mutex
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/bfa/bfad.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/bfa/bfad_drv.h | 1 | ||||
| -rw-r--r-- | drivers/scsi/bfa/bfad_im.c | 13 |
3 files changed, 11 insertions, 5 deletions
diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c index 0baeabadb5b2..d4fc4287ebd3 100644 --- a/drivers/scsi/bfa/bfad.c +++ b/drivers/scsi/bfa/bfad.c @@ -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; diff --git a/drivers/scsi/bfa/bfad_drv.h b/drivers/scsi/bfa/bfad_drv.h index 0639aedcb610..6c920c1b53a4 100644 --- a/drivers/scsi/bfa/bfad_drv.h +++ b/drivers/scsi/bfa/bfad_drv.h @@ -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__ */ diff --git a/drivers/scsi/bfa/bfad_im.c b/drivers/scsi/bfa/bfad_im.c index f263891b8cc6..5b7cf539e50b 100644 --- a/drivers/scsi/bfa/bfad_im.c +++ b/drivers/scsi/bfa/bfad_im.c @@ -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 |