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mmc: queue: Factor out mmc_queue_alloc_bounce_bufs()

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In preparation for supporting a queue of requests, factor out
mmc_queue_alloc_bounce_bufs().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Harjani Ritesh <riteshh@codeaurora.org>
[Ulf: Fixed compiler warning]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2016-11-29 12:09:11 +02:00 committed by Ulf Hansson
parent e0097cf5f2
commit c853982ece
1 changed files with 29 additions and 18 deletions
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47
drivers/mmc/card/queue.c
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@ -186,6 +186,33 @@ static void mmc_queue_setup_discard(struct request_queue *q,
queue_flag_set_unlocked(QUEUE_FLAG_SECERASE, q);
}
#ifdef CONFIG_MMC_BLOCK_BOUNCE
static bool mmc_queue_alloc_bounce_bufs(struct mmc_queue *mq,
unsigned int bouncesz)
{
struct mmc_queue_req *mqrq_cur = mq->mqrq_cur;
struct mmc_queue_req *mqrq_prev = mq->mqrq_prev;
mqrq_cur->bounce_buf = kmalloc(bouncesz, GFP_KERNEL);
if (!mqrq_cur->bounce_buf) {
pr_warn("%s: unable to allocate bounce cur buffer\n",
mmc_card_name(mq->card));
return false;
}
mqrq_prev->bounce_buf = kmalloc(bouncesz, GFP_KERNEL);
if (!mqrq_prev->bounce_buf) {
pr_warn("%s: unable to allocate bounce prev buffer\n",
mmc_card_name(mq->card));
kfree(mqrq_cur->bounce_buf);
mqrq_cur->bounce_buf = NULL;
return false;
}
return true;
}
#endif
/**
* mmc_init_queue - initialise a queue structure.
* @mq: mmc queue
@ -235,24 +262,8 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
if (bouncesz > (host->max_blk_count * 512))
bouncesz = host->max_blk_count * 512;
if (bouncesz > 512) {
mqrq_cur->bounce_buf = kmalloc(bouncesz, GFP_KERNEL);
if (!mqrq_cur->bounce_buf) {
pr_warn("%s: unable to allocate bounce cur buffer\n",
mmc_card_name(card));
} else {
mqrq_prev->bounce_buf =
kmalloc(bouncesz, GFP_KERNEL);
if (!mqrq_prev->bounce_buf) {
pr_warn("%s: unable to allocate bounce prev buffer\n",
mmc_card_name(card));
kfree(mqrq_cur->bounce_buf);
mqrq_cur->bounce_buf = NULL;
}
}
}
if (mqrq_cur->bounce_buf && mqrq_prev->bounce_buf) {
if (bouncesz > 512 &&
mmc_queue_alloc_bounce_bufs(mq, bouncesz)) {
blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_ANY);
blk_queue_max_hw_sectors(mq->queue, bouncesz / 512);
blk_queue_max_segments(mq->queue, bouncesz / 512);