Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

[pandora-kernel.git] / drivers / block / cciss_scsi.c

diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index df79380..6961002 100644 (file)
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -84,7 +84,6 @@ static struct scsi_host_template cciss_driver_template = {
        .proc_name              = "cciss",
        .proc_info              = cciss_scsi_proc_info,
        .queuecommand           = cciss_scsi_queue_command,
-       .can_queue              = SCSI_CCISS_CAN_QUEUE,
        .this_id                = 7,
        .cmd_per_lun            = 1,
        .use_clustering         = DISABLE_CLUSTERING,
@@ -108,16 +107,13 @@ struct cciss_scsi_cmd_stack_elem_t {
 
 #pragma pack()
 
-#define CMD_STACK_SIZE (SCSI_CCISS_CAN_QUEUE * \
-               CCISS_MAX_SCSI_DEVS_PER_HBA + 2)
-                       // plus two for init time usage
-
 #pragma pack(1)
 struct cciss_scsi_cmd_stack_t {
        struct cciss_scsi_cmd_stack_elem_t *pool;
-       struct cciss_scsi_cmd_stack_elem_t *elem[CMD_STACK_SIZE];
+       struct cciss_scsi_cmd_stack_elem_t **elem;
        dma_addr_t cmd_pool_handle;
        int top;
+       int nelems;
 };
 #pragma pack()
 
@@ -191,7 +187,7 @@ scsi_cmd_free(ctlr_info_t *h, CommandList_struct *c)
        sa = h->scsi_ctlr;
        stk = &sa->cmd_stack; 
        stk->top++;
-       if (stk->top >= CMD_STACK_SIZE) {
+       if (stk->top >= stk->nelems) {
                dev_err(&h->pdev->dev,
                        "scsi_cmd_free called too many times.\n");
                BUG();
@@ -206,13 +202,14 @@ scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa)
        struct cciss_scsi_cmd_stack_t *stk;
        size_t size;
 
+       stk = &sa->cmd_stack;
+       stk->nelems = cciss_tape_cmds + 2;
        sa->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
-               h->chainsize, CMD_STACK_SIZE);
+               h->chainsize, stk->nelems);
        if (!sa->cmd_sg_list && h->chainsize > 0)
                return -ENOMEM;
 
-       stk = &sa->cmd_stack; 
-       size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
+       size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems;
 
        /* Check alignment, see cciss_cmd.h near CommandList_struct def. */
        BUILD_BUG_ON((sizeof(*stk->pool) % COMMANDLIST_ALIGNMENT) != 0);
@@ -221,18 +218,23 @@ scsi_cmd_stack_setup(ctlr_info_t *h, struct cciss_scsi_adapter_data_t *sa)
                pci_alloc_consistent(h->pdev, size, &stk->cmd_pool_handle);
 
        if (stk->pool == NULL) {
-               cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
+               cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems);
                sa->cmd_sg_list = NULL;
                return -ENOMEM;
        }
-
-       for (i=0; i<CMD_STACK_SIZE; i++) {
+       stk->elem = kmalloc(sizeof(stk->elem[0]) * stk->nelems, GFP_KERNEL);
+       if (!stk->elem) {
+               pci_free_consistent(h->pdev, size, stk->pool,
+               stk->cmd_pool_handle);
+               return -1;
+       }
+       for (i = 0; i < stk->nelems; i++) {
                stk->elem[i] = &stk->pool[i];
                stk->elem[i]->busaddr = (__u32) (stk->cmd_pool_handle + 
                        (sizeof(struct cciss_scsi_cmd_stack_elem_t) * i));
                stk->elem[i]->cmdindex = i;
        }
-       stk->top = CMD_STACK_SIZE-1;
+       stk->top = stk->nelems-1;
        return 0;
 }
 
@@ -245,16 +247,18 @@ scsi_cmd_stack_free(ctlr_info_t *h)
 
        sa = h->scsi_ctlr;
        stk = &sa->cmd_stack; 
-       if (stk->top != CMD_STACK_SIZE-1) {
+       if (stk->top != stk->nelems-1) {
                dev_warn(&h->pdev->dev,
                        "bug: %d scsi commands are still outstanding.\n",
-                       CMD_STACK_SIZE - stk->top);
+                       stk->nelems - stk->top);
        }
-       size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * CMD_STACK_SIZE;
+       size = sizeof(struct cciss_scsi_cmd_stack_elem_t) * stk->nelems;
 
        pci_free_consistent(h->pdev, size, stk->pool, stk->cmd_pool_handle);
        stk->pool = NULL;
-       cciss_free_sg_chain_blocks(sa->cmd_sg_list, CMD_STACK_SIZE);
+       cciss_free_sg_chain_blocks(sa->cmd_sg_list, stk->nelems);
+       kfree(stk->elem);
+       stk->elem = NULL;
 }
 
 #if 0
@@ -859,6 +863,7 @@ cciss_scsi_detect(ctlr_info_t *h)
        sh->io_port = 0;        // good enough?  FIXME, 
        sh->n_io_port = 0;      // I don't think we use these two...
        sh->this_id = SELF_SCSI_ID;  
+       sh->can_queue = cciss_tape_cmds;
        sh->sg_tablesize = h->maxsgentries;
        sh->max_cmd_len = MAX_COMMAND_SIZE;