diff options
| author | James.Smart@Emulex.Com <James.Smart@Emulex.Com> | 2005-10-05 13:50:08 -0400 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2005-10-16 12:04:22 -0500 |
| commit | d16794f6ac8d9b50f62e02a6e6175ae1a30d0ccd (patch) | |
| tree | b97195955b9527fe20eda91c0249df653a6d1242 /drivers/scsi/scsi_transport_fc.c | |
| parent | 7a9366e46c167930f8bd9e378a3656861c5a41b6 (diff) | |
| download | lwn-d16794f6ac8d9b50f62e02a6e6175ae1a30d0ccd.tar.gz lwn-d16794f6ac8d9b50f62e02a6e6175ae1a30d0ccd.zip | |
[SCSI] FW: [PATCH] for Deadlock in transport_fc
Cannot call fc_rport_terminate() under the host lock, so drop the
lock.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/scsi_transport_fc.c')
| -rw-r--r-- | drivers/scsi/scsi_transport_fc.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c index 2cab556b6e82..771e97ef136e 100644 --- a/drivers/scsi/scsi_transport_fc.c +++ b/drivers/scsi/scsi_transport_fc.c @@ -819,12 +819,15 @@ show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); } +#define get_list_head_entry(pos, head, member) \ + pos = list_entry((head)->next, typeof(*pos), member) + static ssize_t store_fc_private_host_tgtid_bind_type(struct class_device *cdev, const char *buf, size_t count) { struct Scsi_Host *shost = transport_class_to_shost(cdev); - struct fc_rport *rport, *next_rport; + struct fc_rport *rport; enum fc_tgtid_binding_type val; unsigned long flags; @@ -834,9 +837,13 @@ store_fc_private_host_tgtid_bind_type(struct class_device *cdev, /* if changing bind type, purge all unused consistent bindings */ if (val != fc_host_tgtid_bind_type(shost)) { spin_lock_irqsave(shost->host_lock, flags); - list_for_each_entry_safe(rport, next_rport, - &fc_host_rport_bindings(shost), peers) + while (!list_empty(&fc_host_rport_bindings(shost))) { + get_list_head_entry(rport, + &fc_host_rport_bindings(shost), peers); + spin_unlock_irqrestore(shost->host_lock, flags); fc_rport_terminate(rport); + spin_lock_irqsave(shost->host_lock, flags); + } spin_unlock_irqrestore(shost->host_lock, flags); } |