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| author | Joe Eykholt <jeykholt@cisco.com> | 2010-03-12 16:07:46 -0800 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-04-11 09:23:34 -0500 |
| commit | 2f2ac4a0df8c4beee6e4057a69fa973b6040a573 (patch) | |
| tree | 2ff71d9b1f13ff9cc0ed120725f68f003d7b9ae7 /drivers/scsi/libfc | |
| parent | 4dc7ccf7e9d9bca1989b840be9e8e84911387cf2 (diff) | |
| download | kernel_samsung_aries-2f2ac4a0df8c4beee6e4057a69fa973b6040a573.zip kernel_samsung_aries-2f2ac4a0df8c4beee6e4057a69fa973b6040a573.tar.gz kernel_samsung_aries-2f2ac4a0df8c4beee6e4057a69fa973b6040a573.tar.bz2 | |
[SCSI] libfc: fix oops in point-to-point mode
In point-to-point mode, if the PLOGI to the remote port times
out, it can get deleted by the remote port module. Since there's
no reference by the local port, lport->ptp_data points to a freed
rport, and when the local port is reset and tries to logout again,
an oops occurs in mutex_lock_nested().
Hold a reference count on the point-to-point rdata.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/libfc')
| -rw-r--r-- | drivers/scsi/libfc/fc_lport.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c index d126ecf..fe8700f 100644 --- a/drivers/scsi/libfc/fc_lport.c +++ b/drivers/scsi/libfc/fc_lport.c @@ -228,9 +228,12 @@ static void fc_lport_ptp_setup(struct fc_lport *lport, u64 remote_wwnn) { mutex_lock(&lport->disc.disc_mutex); - if (lport->ptp_rdata) + if (lport->ptp_rdata) { lport->tt.rport_logoff(lport->ptp_rdata); + kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); + } lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid); + kref_get(&lport->ptp_rdata->kref); lport->ptp_rdata->ids.port_name = remote_wwpn; lport->ptp_rdata->ids.node_name = remote_wwnn; mutex_unlock(&lport->disc.disc_mutex); @@ -947,7 +950,11 @@ static void fc_lport_reset_locked(struct fc_lport *lport) if (lport->dns_rdata) lport->tt.rport_logoff(lport->dns_rdata); - lport->ptp_rdata = NULL; + if (lport->ptp_rdata) { + lport->tt.rport_logoff(lport->ptp_rdata); + kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy); + lport->ptp_rdata = NULL; + } lport->tt.disc_stop(lport); |