evie/android_kernel_oneplus_msm8998
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mmc: core: Add deferred resume support to CQ

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Defer the resume of the device until a request actually
arrives, thus mandating the use of the device.

CRs-fixed: 987918
Change-Id: I41cf8908dd0f129c54b941c318e938ad7e9d36c9
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
This commit is contained in:
Asutosh Das 2016-04-12 11:52:33 +05:30 • committed by Kyle Yan
parent f88fc3eaa6
commit 21de67ad10
2 changed files with 13 additions and 0 deletions
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4
drivers/mmc/card/block.c
View file

@ -3570,6 +3570,10 @@ static int mmc_blk_cmdq_issue_rq(struct mmc_queue *mq, struct request *req)
mmc_get_card(card);
#ifdef CONFIG_MMC_BLOCK_DEFERRED_RESUME
if (mmc_bus_needs_resume(card->host))
mmc_resume_bus(card->host);
#endif
if (!card->host->cmdq_ctx.active_reqs && mmc_card_doing_bkops(card)) {
ret = mmc_cmdq_halt(card->host, true);
if (ret)

9
drivers/mmc/core/core.c
View file

@ -3051,6 +3051,7 @@ static inline void mmc_bus_put(struct mmc_host *host)
int mmc_resume_bus(struct mmc_host *host)
{
unsigned long flags;
int err = 0;
if (!mmc_bus_needs_resume(host))
return -EINVAL;
@ -3066,6 +3067,14 @@ int mmc_resume_bus(struct mmc_host *host)
mmc_power_up(host, host->card->ocr);
BUG_ON(!host->bus_ops->resume);
host->bus_ops->resume(host);
if (mmc_card_cmdq(host->card)) {
err = mmc_cmdq_halt(host, false);
if (err)
pr_err("%s: %s: unhalt failed: %d\n",
mmc_hostname(host), __func__, err);
else
mmc_card_clr_suspended(host->card);
}
}
if (host->bus_ops->detect && !host->bus_dead)