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Commit e8711085 authored Jan 31, 2008 by Andrew Vasquez Committed by James Bottomley Feb 07, 2008

[SCSI] qla2xxx: Cleanse memory allocation logic during probe.



- Drop loop-till-allocated structure of code within
  qla2x00_mem_alloc().
- Properly unwind deallcations of memory during failures.
- Drop qla2x00_allocate_sp_pool() and qla2x00_free_sp_pool()
  functions as their implementations can easily be collapsed into
  the callers.
- Defer DMA pool allocation of SFP data until requested.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

parent 0afb467b

drivers/scsi/qla2xxx/qla_attr.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -428,6 +428,19 @@ qla2x00_sysfs_read_sfp(struct kobject *kobj,
		if (!capable(CAP_SYS_ADMIN) \|\| off != 0 \|\| count != SFP_DEV_SIZE * 2)
		return 0;

		if (ha->sfp_data)
		goto do_read;

		ha->sfp_data = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
		&ha->sfp_data_dma);
		if (!ha->sfp_data) {
		qla_printk(KERN_WARNING, ha,
		"Unable to allocate memory for SFP read-data.\n");
		return 0;
		}

		do_read:
		memset(ha->sfp_data, 0, SFP_BLOCK_SIZE);
		addr = 0xa0;
		for (iter = 0, offset = 0; iter < (SFP_DEV_SIZE * 2) / SFP_BLOCK_SIZE;
		iter++, offset += SFP_BLOCK_SIZE) {

drivers/scsi/qla2xxx/qla_os.c

+98 −230

Original line number	Diff line number	Diff line
		@@ -204,10 +204,8 @@ static int qla2x00_do_dpc(void *data);

		static void qla2x00_rst_aen(scsi_qla_host_t *);

		static uint8_t qla2x00_mem_alloc(scsi_qla_host_t *);
		static int qla2x00_mem_alloc(scsi_qla_host_t *);
		static void qla2x00_mem_free(scsi_qla_host_t *ha);
		static int qla2x00_allocate_sp_pool( scsi_qla_host_t *ha);
		static void qla2x00_free_sp_pool(scsi_qla_host_t *ha);
		static void qla2x00_sp_free_dma(scsi_qla_host_t , srb_t );

		/* -------------------------------------------------------------------------- */
		@@ -2032,196 +2030,109 @@ qla2x00_mark_all_devices_lost(scsi_qla_host_t *ha, int defer)
		*
		* Returns:
		* 0 = success.
		* 1 = failure.
		* !0 = failure.
		*/
		static uint8_t
		static int
		qla2x00_mem_alloc(scsi_qla_host_t *ha)
		{
		char name[16];
		uint8_t status = 1;
		int retry= 10;

		do {
		/*
		* This will loop only once if everything goes well, else some
		* number of retries will be performed to get around a kernel
		* bug where available mem is not allocated until after a
		* little delay and a retry.
		*/
		ha->request_ring = dma_alloc_coherent(&ha->pdev->dev,
		(ha->request_q_length + 1) * sizeof(request_t),
		&ha->request_dma, GFP_KERNEL);
		if (ha->request_ring == NULL) {
		qla_printk(KERN_WARNING, ha,
		"Memory Allocation failed - request_ring\n");

		qla2x00_mem_free(ha);
		msleep(100);

		continue;
		}
		(ha->request_q_length + 1) * sizeof(request_t), &ha->request_dma,
		GFP_KERNEL);
		if (!ha->request_ring)
		goto fail;

		ha->response_ring = dma_alloc_coherent(&ha->pdev->dev,
		(ha->response_q_length + 1) * sizeof(response_t),
		&ha->response_dma, GFP_KERNEL);
		if (ha->response_ring == NULL) {
		qla_printk(KERN_WARNING, ha,
		"Memory Allocation failed - response_ring\n");

		qla2x00_mem_free(ha);
		msleep(100);

		continue;
		}
		if (!ha->response_ring)
		goto fail_free_request_ring;

		ha->gid_list = dma_alloc_coherent(&ha->pdev->dev, GID_LIST_SIZE,
		&ha->gid_list_dma, GFP_KERNEL);
		if (ha->gid_list == NULL) {
		qla_printk(KERN_WARNING, ha,
		"Memory Allocation failed - gid_list\n");

		qla2x00_mem_free(ha);
		msleep(100);

		continue;
		}

		/* get consistent memory allocated for init control block */
		ha->init_cb = dma_alloc_coherent(&ha->pdev->dev,
		ha->init_cb_size, &ha->init_cb_dma, GFP_KERNEL);
		if (ha->init_cb == NULL) {
		qla_printk(KERN_WARNING, ha,
		"Memory Allocation failed - init_cb\n");

		qla2x00_mem_free(ha);
		msleep(100);
		if (!ha->gid_list)
		goto fail_free_response_ring;

		continue;
		}
		memset(ha->init_cb, 0, ha->init_cb_size);
		ha->init_cb = dma_alloc_coherent(&ha->pdev->dev, ha->init_cb_size,
		&ha->init_cb_dma, GFP_KERNEL);
		if (!ha->init_cb)
		goto fail_free_gid_list;

		snprintf(name, sizeof(name), "%s_%ld", QLA2XXX_DRIVER_NAME,
		ha->host_no);
		ha->s_dma_pool = dma_pool_create(name, &ha->pdev->dev,
		DMA_POOL_SIZE, 8, 0);
		if (ha->s_dma_pool == NULL) {
		qla_printk(KERN_WARNING, ha,
		"Memory Allocation failed - s_dma_pool\n");

		qla2x00_mem_free(ha);
		msleep(100);

		continue;
		}
		if (!ha->s_dma_pool)
		goto fail_free_init_cb;

		if (qla2x00_allocate_sp_pool(ha)) {
		qla_printk(KERN_WARNING, ha,
		"Memory Allocation failed - "
		"qla2x00_allocate_sp_pool()\n");

		qla2x00_mem_free(ha);
		msleep(100);
		ha->srb_mempool = mempool_create_slab_pool(SRB_MIN_REQ, srb_cachep);
		if (!ha->srb_mempool)
		goto fail_free_s_dma_pool;

		continue;
		}
		/* Get memory for cached NVRAM */
		ha->nvram = kzalloc(MAX_NVRAM_SIZE, GFP_KERNEL);
		if (!ha->nvram)
		goto fail_free_srb_mempool;

		/* Allocate memory for SNS commands */
		if (IS_QLA2100(ha) \|\| IS_QLA2200(ha)) {
		/* Get consistent memory allocated for SNS commands */
		ha->sns_cmd = dma_alloc_coherent(&ha->pdev->dev,
		sizeof(struct sns_cmd_pkt), &ha->sns_cmd_dma,
		GFP_KERNEL);
		if (ha->sns_cmd == NULL) {
		/* error */
		qla_printk(KERN_WARNING, ha,
		"Memory Allocation failed - sns_cmd\n");

		qla2x00_mem_free(ha);
		msleep(100);

		continue;
		}
		memset(ha->sns_cmd, 0, sizeof(struct sns_cmd_pkt));
		sizeof(struct sns_cmd_pkt), &ha->sns_cmd_dma, GFP_KERNEL);
		if (!ha->sns_cmd)
		goto fail_free_nvram;
		} else {
		/* Get consistent memory allocated for MS IOCB */
		ha->ms_iocb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
		&ha->ms_iocb_dma);
		if (ha->ms_iocb == NULL) {
		/* error */
		qla_printk(KERN_WARNING, ha,
		"Memory Allocation failed - ms_iocb\n");

		qla2x00_mem_free(ha);
		msleep(100);
		if (!ha->ms_iocb)
		goto fail_free_nvram;

		continue;
		}
		memset(ha->ms_iocb, 0, sizeof(ms_iocb_entry_t));

		/*
		* Get consistent memory allocated for CT SNS
		* commands
		*/
		/* Get consistent memory allocated for CT SNS commands */
		ha->ct_sns = dma_alloc_coherent(&ha->pdev->dev,
		sizeof(struct ct_sns_pkt), &ha->ct_sns_dma,
		GFP_KERNEL);
		if (ha->ct_sns == NULL) {
		/* error */
		qla_printk(KERN_WARNING, ha,
		"Memory Allocation failed - ct_sns\n");

		qla2x00_mem_free(ha);
		msleep(100);

		continue;
		sizeof(struct ct_sns_pkt), &ha->ct_sns_dma, GFP_KERNEL);
		if (!ha->ct_sns)
		goto fail_free_ms_iocb;
		}
		memset(ha->ct_sns, 0, sizeof(struct ct_sns_pkt));

		if (IS_FWI2_CAPABLE(ha)) {
		/*
		* Get consistent memory allocated for SFP
		* block.
		*/
		ha->sfp_data = dma_pool_alloc(ha->s_dma_pool,
		GFP_KERNEL, &ha->sfp_data_dma);
		if (ha->sfp_data == NULL) {
		qla_printk(KERN_WARNING, ha,
		"Memory Allocation failed - "
		"sfp_data\n");

		qla2x00_mem_free(ha);
		msleep(100);

		continue;
		}
		memset(ha->sfp_data, 0, SFP_BLOCK_SIZE);
		}
		}

		/* Get memory for cached NVRAM */
		ha->nvram = kzalloc(MAX_NVRAM_SIZE, GFP_KERNEL);
		if (ha->nvram == NULL) {
		/* error */
		qla_printk(KERN_WARNING, ha,
		"Memory Allocation failed - nvram cache\n");

		qla2x00_mem_free(ha);
		msleep(100);

		continue;
		}

		/* Done all allocations without any error. */
		status = 0;

		} while (retry-- && status != 0);

		if (status) {
		printk(KERN_WARNING
		"%s(): ** FAILED **\n", __func__);
		}
		return 0;

		return(status);
		fail_free_ms_iocb:
		dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);
		ha->ms_iocb = NULL;
		ha->ms_iocb_dma = 0;
		fail_free_nvram:
		kfree(ha->nvram);
		ha->nvram = NULL;
		fail_free_srb_mempool:
		mempool_destroy(ha->srb_mempool);
		ha->srb_mempool = NULL;
		fail_free_s_dma_pool:
		dma_pool_destroy(ha->s_dma_pool);
		ha->s_dma_pool = NULL;
		fail_free_init_cb:
		dma_free_coherent(&ha->pdev->dev, ha->init_cb_size, ha->init_cb,
		ha->init_cb_dma);
		ha->init_cb = NULL;
		ha->init_cb_dma = 0;
		fail_free_gid_list:
		dma_free_coherent(&ha->pdev->dev, GID_LIST_SIZE, ha->gid_list,
		ha->gid_list_dma);
		ha->gid_list = NULL;
		ha->gid_list_dma = 0;
		fail_free_response_ring:
		dma_free_coherent(&ha->pdev->dev, (ha->response_q_length + 1) *
		sizeof(response_t), ha->response_ring, ha->response_dma);
		ha->response_ring = NULL;
		ha->response_dma = 0;
		fail_free_request_ring:
		dma_free_coherent(&ha->pdev->dev, (ha->request_q_length + 1) *
		sizeof(request_t), ha->request_ring, ha->request_dma);
		ha->request_ring = NULL;
		ha->request_dma = 0;
		fail:
		return -ENOMEM;
		}

		/*
		@@ -2237,14 +2148,8 @@ qla2x00_mem_free(scsi_qla_host_t *ha)
		struct list_head fcpl, fcptemp;
		fc_port_t *fcport;

		if (ha == NULL) {
		/* error */
		DEBUG2(printk("%s(): ERROR invalid ha pointer.\n", __func__));
		return;
		}

		/* free sp pool */
		qla2x00_free_sp_pool(ha);
		if (ha->srb_mempool)
		mempool_destroy(ha->srb_mempool);

		if (ha->fce)
		dma_free_coherent(&ha->pdev->dev, FCE_SIZE, ha->fce,
		@@ -2292,6 +2197,7 @@ qla2x00_mem_free(scsi_qla_host_t *ha)
		(ha->request_q_length + 1) * sizeof(request_t),
		ha->request_ring, ha->request_dma);

		ha->srb_mempool = NULL;
		ha->eft = NULL;
		ha->eft_dma = 0;
		ha->sns_cmd = NULL;
		@@ -2330,44 +2236,6 @@ qla2x00_mem_free(scsi_qla_host_t *ha)
		kfree(ha->nvram);
		}

		/*
		* qla2x00_allocate_sp_pool
		* This routine is called during initialization to allocate
		* memory for local srb_t.
		*
		* Input:
		* ha = adapter block pointer.
		*
		* Context:
		* Kernel context.
		*/
		static int
		qla2x00_allocate_sp_pool(scsi_qla_host_t *ha)
		{
		int rval;

		rval = QLA_SUCCESS;
		ha->srb_mempool = mempool_create_slab_pool(SRB_MIN_REQ, srb_cachep);
		if (ha->srb_mempool == NULL) {
		qla_printk(KERN_INFO, ha, "Unable to allocate SRB mempool.\n");
		rval = QLA_FUNCTION_FAILED;
		}
		return (rval);
		}

		/*
		* This routine frees all adapter allocated memory.
		*
		*/
		static void
		qla2x00_free_sp_pool( scsi_qla_host_t *ha)
		{
		if (ha->srb_mempool) {
		mempool_destroy(ha->srb_mempool);
		ha->srb_mempool = NULL;
		}
		}

		/**************************************************************************
		* qla2x00_do_dpc
		* This kernel thread is a task that is schedule by the interrupt handler

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