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[SCSI] megaraid_mbox: remove scsi_assign_lock usage
also remove the adapter->host_lock alias for adapter->lock and remove some superflous locking aswell as removing the tiny locking wrappers for the EH routines. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Christoph Hellwig
James Bottomley
parent
3072c4abdd
commit
f2c8dc402b
@ -97,7 +97,6 @@ typedef struct {
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* @param dpc_h : tasklet handle
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* @param pdev : pci configuration pointer for kernel
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* @param host : pointer to host structure of mid-layer
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* @param host_lock : pointer to appropriate lock
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* @param lock : synchronization lock for mid-layer and driver
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* @param quiescent : driver is quiescent for now.
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* @param outstanding_cmds : number of commands pending in the driver
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@ -152,7 +151,6 @@ typedef struct {
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struct tasklet_struct dpc_h;
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struct pci_dev *pdev;
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struct Scsi_Host *host;
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spinlock_t *host_lock;
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spinlock_t lock;
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uint8_t quiescent;
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int outstanding_cmds;
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@ -533,8 +533,6 @@ megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
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// Initialize the synchronization lock for kernel and LLD
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spin_lock_init(&adapter->lock);
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adapter->host_lock = &adapter->lock;
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// Initialize the command queues: the list of free SCBs and the list
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// of pending SCBs.
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@ -715,9 +713,6 @@ megaraid_io_attach(adapter_t *adapter)
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SCSIHOST2ADAP(host) = (caddr_t)adapter;
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adapter->host = host;
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// export the parameters required by the mid-layer
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scsi_assign_lock(host, adapter->host_lock);
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host->irq = adapter->irq;
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host->unique_id = adapter->unique_id;
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host->can_queue = adapter->max_cmds;
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@ -1560,10 +1555,6 @@ megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
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scp->scsi_done = done;
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scp->result = 0;
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assert_spin_locked(adapter->host_lock);
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spin_unlock(adapter->host_lock);
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/*
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* Allocate and build a SCB request
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* if_busy flag will be set if megaraid_mbox_build_cmd() command could
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@ -1573,23 +1564,16 @@ megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
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* return 0 in that case, and we would do the callback right away.
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*/
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if_busy = 0;
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scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
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if (scb) {
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megaraid_mbox_runpendq(adapter, scb);
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}
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spin_lock(adapter->host_lock);
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scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
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if (!scb) { // command already completed
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done(scp);
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return 0;
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}
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megaraid_mbox_runpendq(adapter, scb);
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return if_busy;
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}
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/**
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* megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid
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* firmware lingua
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@ -2546,9 +2530,7 @@ megaraid_mbox_dpc(unsigned long devp)
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megaraid_dealloc_scb(adapter, scb);
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// send the scsi packet back to kernel
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spin_lock(adapter->host_lock);
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scp->scsi_done(scp);
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spin_unlock(adapter->host_lock);
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}
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return;
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@ -2563,7 +2545,7 @@ megaraid_mbox_dpc(unsigned long devp)
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* aborted. All the commands issued to the F/W must complete.
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**/
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static int
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__megaraid_abort_handler(struct scsi_cmnd *scp)
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megaraid_abort_handler(struct scsi_cmnd *scp)
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{
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adapter_t *adapter;
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mraid_device_t *raid_dev;
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@ -2577,8 +2559,6 @@ __megaraid_abort_handler(struct scsi_cmnd *scp)
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adapter = SCP2ADAPTER(scp);
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raid_dev = ADAP2RAIDDEV(adapter);
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assert_spin_locked(adapter->host_lock);
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con_log(CL_ANN, (KERN_WARNING
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"megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
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scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
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@ -2658,6 +2638,7 @@ __megaraid_abort_handler(struct scsi_cmnd *scp)
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// traverse through the list of all SCB, since driver does not
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// maintain these SCBs on any list
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found = 0;
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spin_lock_irq(&adapter->lock);
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for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
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scb = adapter->kscb_list + i;
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@ -2680,6 +2661,7 @@ __megaraid_abort_handler(struct scsi_cmnd *scp)
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}
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}
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}
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spin_unlock_irq(&adapter->lock);
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if (!found) {
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con_log(CL_ANN, (KERN_WARNING
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@ -2696,22 +2678,6 @@ __megaraid_abort_handler(struct scsi_cmnd *scp)
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return FAILED;
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}
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static int
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megaraid_abort_handler(struct scsi_cmnd *scp)
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{
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adapter_t *adapter;
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int rc;
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adapter = SCP2ADAPTER(scp);
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spin_lock_irq(adapter->host_lock);
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rc = __megaraid_abort_handler(scp);
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spin_unlock_irq(adapter->host_lock);
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return rc;
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}
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/**
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* megaraid_reset_handler - device reset hadler for mailbox based driver
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* @scp : reference command
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@ -2723,7 +2689,7 @@ megaraid_abort_handler(struct scsi_cmnd *scp)
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* host
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**/
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static int
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__megaraid_reset_handler(struct scsi_cmnd *scp)
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megaraid_reset_handler(struct scsi_cmnd *scp)
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{
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adapter_t *adapter;
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scb_t *scb;
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@ -2739,10 +2705,6 @@ __megaraid_reset_handler(struct scsi_cmnd *scp)
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adapter = SCP2ADAPTER(scp);
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raid_dev = ADAP2RAIDDEV(adapter);
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assert_spin_locked(adapter->host_lock);
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con_log(CL_ANN, (KERN_WARNING "megaraid: reseting the host...\n"));
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// return failure if adapter is not responding
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if (raid_dev->hw_error) {
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con_log(CL_ANN, (KERN_NOTICE
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@ -2779,8 +2741,6 @@ __megaraid_reset_handler(struct scsi_cmnd *scp)
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adapter->outstanding_cmds, MBOX_RESET_WAIT));
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}
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spin_unlock(adapter->host_lock);
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recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
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recovering = adapter->outstanding_cmds;
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@ -2806,7 +2766,7 @@ __megaraid_reset_handler(struct scsi_cmnd *scp)
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msleep(1000);
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}
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spin_lock(adapter->host_lock);
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spin_lock(&adapter->lock);
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// If still outstanding commands, bail out
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if (adapter->outstanding_cmds) {
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@ -2815,7 +2775,8 @@ __megaraid_reset_handler(struct scsi_cmnd *scp)
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raid_dev->hw_error = 1;
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return FAILED;
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rval = FAILED;
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goto out;
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}
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else {
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con_log(CL_ANN, (KERN_NOTICE
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@ -2824,7 +2785,10 @@ __megaraid_reset_handler(struct scsi_cmnd *scp)
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// If the controller supports clustering, reset reservations
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if (!adapter->ha) return SUCCESS;
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if (!adapter->ha) {
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rval = SUCCESS;
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goto out;
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}
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// clear reservations if any
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raw_mbox[0] = CLUSTER_CMD;
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@ -2841,22 +2805,11 @@ __megaraid_reset_handler(struct scsi_cmnd *scp)
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"megaraid: reservation reset failed\n"));
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}
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out:
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spin_unlock_irq(&adapter->lock);
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return rval;
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}
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static int
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megaraid_reset_handler(struct scsi_cmnd *cmd)
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{
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int rc;
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spin_lock_irq(cmd->device->host->host_lock);
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rc = __megaraid_reset_handler(cmd);
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spin_unlock_irq(cmd->device->host->host_lock);
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return rc;
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}
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/*
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* START: internal commands library
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*
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@ -3776,9 +3729,9 @@ wait_till_fw_empty(adapter_t *adapter)
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/*
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* Set the quiescent flag to stop issuing cmds to FW.
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*/
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spin_lock_irqsave(adapter->host_lock, flags);
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spin_lock_irqsave(&adapter->lock, flags);
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adapter->quiescent++;
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spin_unlock_irqrestore(adapter->host_lock, flags);
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spin_unlock_irqrestore(&adapter->lock, flags);
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/*
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* Wait till there are no more cmds outstanding at FW. Try for at most
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