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IB/srp: Introduce a local variable in srp_add_one()

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This patch makes the srp_add_one() code more compact and does not
change any functionality.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bart Van Assche 2016-11-21 13:57:07 -08:00 committed by Doug Ledford
parent 1a1faf7a8a
commit 042dd765bd
1 changed files with 9 additions and 8 deletions
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17
drivers/infiniband/ulp/srp/ib_srp.c
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@ -3527,6 +3527,7 @@ free_host:
static void srp_add_one(struct ib_device *device)
{
struct srp_device *srp_dev;
struct ib_device_attr *attr = &device->attrs;
struct srp_host *host;
int mr_page_shift, p;
u64 max_pages_per_mr;
@ -3541,25 +3542,25 @@ static void srp_add_one(struct ib_device *device)
* minimum of 4096 bytes. We're unlikely to build large sglists
* out of smaller entries.
*/
mr_page_shift = max(12, ffs(device->attrs.page_size_cap) - 1);
mr_page_shift = max(12, ffs(attr->page_size_cap) - 1);
srp_dev->mr_page_size = 1 << mr_page_shift;
srp_dev->mr_page_mask = ~((u64) srp_dev->mr_page_size - 1);
max_pages_per_mr = device->attrs.max_mr_size;
max_pages_per_mr = attr->max_mr_size;
do_div(max_pages_per_mr, srp_dev->mr_page_size);
pr_debug("%s: %llu / %u = %llu <> %u\n", __func__,
device->attrs.max_mr_size, srp_dev->mr_page_size,
attr->max_mr_size, srp_dev->mr_page_size,
max_pages_per_mr, SRP_MAX_PAGES_PER_MR);
srp_dev->max_pages_per_mr = min_t(u64, SRP_MAX_PAGES_PER_MR,
max_pages_per_mr);
srp_dev->has_fmr = (device->alloc_fmr && device->dealloc_fmr &&
device->map_phys_fmr && device->unmap_fmr);
srp_dev->has_fr = (device->attrs.device_cap_flags &
srp_dev->has_fr = (attr->device_cap_flags &
IB_DEVICE_MEM_MGT_EXTENSIONS);
if (!never_register && !srp_dev->has_fmr && !srp_dev->has_fr) {
dev_warn(&device->dev, "neither FMR nor FR is supported\n");
} else if (!never_register &&
device->attrs.max_mr_size >= 2 * srp_dev->mr_page_size) {
attr->max_mr_size >= 2 * srp_dev->mr_page_size) {
srp_dev->use_fast_reg = (srp_dev->has_fr &&
(!srp_dev->has_fmr || prefer_fr));
srp_dev->use_fmr = !srp_dev->use_fast_reg && srp_dev->has_fmr;
@ -3572,13 +3573,13 @@ static void srp_add_one(struct ib_device *device)
if (srp_dev->use_fast_reg) {
srp_dev->max_pages_per_mr =
min_t(u32, srp_dev->max_pages_per_mr,
device->attrs.max_fast_reg_page_list_len);
attr->max_fast_reg_page_list_len);
}
srp_dev->mr_max_size = srp_dev->mr_page_size *
srp_dev->max_pages_per_mr;
pr_debug("%s: mr_page_shift = %d, device->max_mr_size = %#llx, device->max_fast_reg_page_list_len = %u, max_pages_per_mr = %d, mr_max_size = %#x\n",
device->name, mr_page_shift, device->attrs.max_mr_size,
device->attrs.max_fast_reg_page_list_len,
device->name, mr_page_shift, attr->max_mr_size,
attr->max_fast_reg_page_list_len,
srp_dev->max_pages_per_mr, srp_dev->mr_max_size);
INIT_LIST_HEAD(&srp_dev->dev_list);