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| author | Dan Williams <dan.j.williams@intel.com> | 2011-06-23 23:44:52 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2011-07-03 04:04:51 -0700 |
| commit | 4cffe13e0dfd00f90c86b0153c751dab61a1bf1d (patch) | |
| tree | c9d04a30f845dcaa0eb750405e63bb43ca5657f1 /drivers/scsi | |
| parent | 7cafbf1bd56be44038148bb8f733ea6e6a6a2d53 (diff) | |
| download | lwn-4cffe13e0dfd00f90c86b0153c751dab61a1bf1d.tar.gz lwn-4cffe13e0dfd00f90c86b0153c751dab61a1bf1d.zip | |
isci: fix frame received locking
Updates to the frame_rcvd before need to be atomic with respect to when
they are evaluated by libsas.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/isci/phy.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c index 93a401dfbd30..c01d76210aa2 100644 --- a/drivers/scsi/isci/phy.c +++ b/drivers/scsi/isci/phy.c @@ -893,6 +893,7 @@ enum sci_status scic_sds_phy_frame_handler(struct scic_sds_phy *sci_phy, enum scic_sds_phy_states state = sci_phy->sm.current_state_id; struct scic_sds_controller *scic = sci_phy->owning_port->owning_controller; enum sci_status result; + unsigned long flags; switch (state) { case SCI_PHY_SUB_AWAIT_IAF_UF: { @@ -911,7 +912,9 @@ enum sci_status scic_sds_phy_frame_handler(struct scic_sds_phy *sci_phy, if (iaf.frame_type == 0) { u32 state; + spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags); memcpy(&iphy->frame_rcvd.iaf, &iaf, sizeof(iaf)); + spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags); if (iaf.smp_tport) { /* We got the IAF for an expander PHY go to the final * state since there are no power requirements for @@ -954,9 +957,11 @@ enum sci_status scic_sds_phy_frame_handler(struct scic_sds_phy *sci_phy, frame_index, (void **)&fis_frame_data); + spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags); scic_sds_controller_copy_sata_response(&iphy->frame_rcvd.fis, frame_header, fis_frame_data); + spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags); /* got IAF we can now go to the await spinup semaphore state */ sci_change_state(&sci_phy->sm, SCI_PHY_SUB_FINAL); |