/* * Copyright (c) 2009 Atheros Communications Inc. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* * Cache-line-align. This is important (for the * 5210 at least) as not doing so causes bogus data * in rx'd frames.
*/
/* Note: the kernel can allocate a value greater than * what we ask it to give us. We really only need 4 KB as that * is this hardware supports and in fact we need at least 3849 * as that is the MAX AMSDU size this hardware supports. * Unfortunately this means we may get 8 KB here from the * kernel... and that is actually what is observed on some
* systems :( */
skb = __dev_alloc_skb(len + common->cachelsz - 1, gfp_mask); if (skb != NULL) {
off = ((unsignedlong) skb->data) % common->cachelsz; if (off != 0)
skb_reserve(skb, common->cachelsz - off);
} else {
pr_err("skbuff alloc of size %u failed\n", len); return NULL;
}
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