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Commit cb0258a2 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by James Bottomley
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[SCSI] megaraid (legacy): remove scsi_assign_lock usage 



just take the adapter lock in megaraid_queue.  Additional benefit is
that we can get rid of the awkward conditional locking in
mega_internal_command.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent f2c8dc40

drivers/scsi/megaraid.c

+13 −19
Original line number Diff line number Diff line
@@ -362,6 +362,7 @@ megaraid_queue(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *)) 
	adapter_t	*adapter;

	scb_t	*scb;

	int	busy=0;

	unsigned long flags;



	adapter = (adapter_t *)scmd->device->host->hostdata;
@@ -377,6 +378,7 @@ megaraid_queue(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *)) 
	 * return 0 in that case.

	 */



	spin_lock_irqsave(&adapter->lock, flags);

	scb = mega_build_cmd(adapter, scmd, &busy);



	if(scb) {
@@ -393,6 +395,7 @@ megaraid_queue(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *)) 
		}

		return 0;

	}

	spin_unlock_irqrestore(&adapter->lock, flags);



	return busy;

}
@@ -1981,7 +1984,7 @@ megaraid_reset(struct scsi_cmnd *cmd) 
	mc.cmd = MEGA_CLUSTER_CMD;

	mc.opcode = MEGA_RESET_RESERVATIONS;



	if( mega_internal_command(adapter, LOCK_INT, &mc, NULL) != 0 ) {

	if( mega_internal_command(adapter, &mc, NULL) != 0 ) {

		printk(KERN_WARNING

				"megaraid: reservation reset failed.\n");

	}
@@ -3011,7 +3014,7 @@ proc_rdrv(adapter_t *adapter, char *page, int start, int end ) 
		mc.cmd = FC_NEW_CONFIG;

		mc.opcode = OP_DCMD_READ_CONFIG;



		if( mega_internal_command(adapter, LOCK_INT, &mc, NULL) ) {

		if( mega_internal_command(adapter, &mc, NULL) ) {



			len = sprintf(page, "40LD read config failed.\n");
@@ -3029,11 +3032,11 @@ proc_rdrv(adapter_t *adapter, char *page, int start, int end ) 
	else {

		mc.cmd = NEW_READ_CONFIG_8LD;



		if( mega_internal_command(adapter, LOCK_INT, &mc, NULL) ) {

		if( mega_internal_command(adapter, &mc, NULL) ) {



			mc.cmd = READ_CONFIG_8LD;



			if( mega_internal_command(adapter, LOCK_INT, &mc,

			if( mega_internal_command(adapter, &mc,

						NULL) ){



				len = sprintf(page,
@@ -3632,7 +3635,7 @@ megadev_ioctl(struct inode *inode, struct file *filep, unsigned int cmd, 
			/*

			 * Issue the command

			 */

			mega_internal_command(adapter, LOCK_INT, &mc, pthru);

			mega_internal_command(adapter, &mc, pthru);



			rval = mega_n_to_m((void __user *)arg, &mc);
@@ -3715,7 +3718,7 @@ freemem_and_return: 
			/*

			 * Issue the command

			 */

			mega_internal_command(adapter, LOCK_INT, &mc, NULL);

			mega_internal_command(adapter, &mc, NULL);



			rval = mega_n_to_m((void __user *)arg, &mc);
@@ -4234,7 +4237,7 @@ mega_do_del_logdrv(adapter_t *adapter, int logdrv) 
	mc.opcode = OP_DEL_LOGDRV;

	mc.subopcode = logdrv;



	rval = mega_internal_command(adapter, LOCK_INT, &mc, NULL);

	rval = mega_internal_command(adapter, &mc, NULL);



	/* log this event */

	if(rval) {
@@ -4367,7 +4370,7 @@ mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle) 


	mc.xferaddr = (u32)dma_handle;



	if ( mega_internal_command(adapter, LOCK_INT, &mc, NULL) != 0 ) {

	if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {

		return -1;

	}
@@ -4435,7 +4438,7 @@ mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt, 
	mc.cmd = MEGA_MBOXCMD_PASSTHRU;

	mc.xferaddr = (u32)pthru_dma_handle;



	rval = mega_internal_command(adapter, LOCK_INT, &mc, pthru);

	rval = mega_internal_command(adapter, &mc, pthru);



	pci_free_consistent(pdev, sizeof(mega_passthru), pthru,

			pthru_dma_handle);
@@ -4449,7 +4452,6 @@ mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt, 
/**

 * mega_internal_command()

 * @adapter - pointer to our soft state

 * @ls - the scope of the exclusion lock.

 * @mc - the mailbox command

 * @pthru - Passthru structure for DCDB commands

 *
@@ -4463,8 +4465,7 @@ mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt, 
 * Note: parameter 'pthru' is null for non-passthru commands.

 */

static int

mega_internal_command(adapter_t *adapter, lockscope_t ls, megacmd_t *mc,

		mega_passthru *pthru )

mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)

{

	Scsi_Cmnd	*scmd;

	struct	scsi_device *sdev;
@@ -4508,15 +4509,8 @@ mega_internal_command(adapter_t *adapter, lockscope_t ls, megacmd_t *mc, 


	scb->idx = CMDID_INT_CMDS;



	/*

	 * Get the lock only if the caller has not acquired it already

	 */

	if( ls == LOCK_INT ) spin_lock_irqsave(&adapter->lock, flags);



	megaraid_queue(scmd, mega_internal_done);



	if( ls == LOCK_INT ) spin_unlock_irqrestore(&adapter->lock, flags);



	wait_for_completion(&adapter->int_waitq);



	rval = scmd->result;

drivers/scsi/megaraid.h

+1 −9
Original line number Diff line number Diff line
@@ -925,13 +925,6 @@ struct mega_hbas { 
#define MEGA_BULK_DATA			0x0001

#define MEGA_SGLIST			0x0002



/*

 * lockscope definitions, callers can specify the lock scope with this data

 * type. LOCK_INT would mean the caller has not acquired the lock before

 * making the call and LOCK_EXT would mean otherwise.

 */

typedef enum { LOCK_INT, LOCK_EXT } lockscope_t;



/*

 * Parameters for the io-mapped controllers

 */
@@ -1062,8 +1055,7 @@ static int mega_support_random_del(adapter_t *); 
static int mega_del_logdrv(adapter_t *, int);

static int mega_do_del_logdrv(adapter_t *, int);

static void mega_get_max_sgl(adapter_t *);

static int mega_internal_command(adapter_t *, lockscope_t, megacmd_t *,

		mega_passthru *);

static int mega_internal_command(adapter_t *, megacmd_t *, mega_passthru *);

static void mega_internal_done(Scsi_Cmnd *);

static int mega_support_cluster(adapter_t *);

#endif