diff options
| author | Stephen M. Cameron <scameron@beardog.cce.hp.com> | 2011-05-03 14:53:10 -0500 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-05-06 08:23:48 -0600 |
| commit | abf7966e616ef6e04393ef3678227f77d6179a8a (patch) | |
| tree | 2980bb8819af206b14ebf3cc7d3ed8cab3ccc334 /drivers/block | |
| parent | 54dae3432021f38cf20542ccd152dddb91c7c2d7 (diff) | |
cciss: factor out scatterlist allocation functions
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/cciss.c | 55 |
1 files changed, 35 insertions, 20 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 152cb40e2e2..55ca1f45c0c 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -4673,6 +4673,39 @@ static __devinit int cciss_allocate_cmd_pool(ctlr_info_t *h) return 0; } +static __devinit int cciss_allocate_scatterlists(ctlr_info_t *h) +{ + int i; + + /* zero it, so that on free we need not know how many were alloc'ed */ + h->scatter_list = kzalloc(h->max_commands * + sizeof(struct scatterlist *), GFP_KERNEL); + if (!h->scatter_list) + return -ENOMEM; + + for (i = 0; i < h->nr_cmds; i++) { + h->scatter_list[i] = kmalloc(sizeof(struct scatterlist) * + h->maxsgentries, GFP_KERNEL); + if (h->scatter_list[i] == NULL) { + dev_err(&h->pdev->dev, "could not allocate " + "s/g lists\n"); + return -ENOMEM; + } + } + return 0; +} + +static void cciss_free_scatterlists(ctlr_info_t *h) +{ + int i; + + if (h->scatter_list) { + for (i = 0; i < h->nr_cmds; i++) + kfree(h->scatter_list[i]); + kfree(h->scatter_list); + } +} + static void cciss_free_cmd_pool(ctlr_info_t *h) { kfree(h->cmd_pool_bits); @@ -4696,7 +4729,6 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, { int i; int j = 0; - int k = 0; int rc; int dac, return_code; InquiryData_struct *inq_buff; @@ -4781,23 +4813,9 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, if (cciss_allocate_cmd_pool(h)) goto clean4; - /* Need space for temp scatter list */ - h->scatter_list = kmalloc(h->max_commands * - sizeof(struct scatterlist *), - GFP_KERNEL); - if (!h->scatter_list) + if (cciss_allocate_scatterlists(h)) goto clean4; - for (k = 0; k < h->nr_cmds; k++) { - h->scatter_list[k] = kmalloc(sizeof(struct scatterlist) * - h->maxsgentries, - GFP_KERNEL); - if (h->scatter_list[k] == NULL) { - dev_err(&h->pdev->dev, - "could not allocate s/g lists\n"); - goto clean4; - } - } h->cmd_sg_list = cciss_allocate_sg_chain_blocks(h, h->chainsize, h->nr_cmds); if (!h->cmd_sg_list && h->chainsize > 0) @@ -4856,10 +4874,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, clean4: cciss_free_cmd_pool(h); - /* Free up sg elements */ - for (k-- ; k >= 0; k--) - kfree(h->scatter_list[k]); - kfree(h->scatter_list); + cciss_free_scatterlists(h); cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds); free_irq(h->intr[PERF_MODE_INT], h); clean2: |