@@ -2828,6 +2828,14 @@ void mmc_start_host(struct mmc_host *host)
host->f_init = max(freqs[0], host->f_min);
host->rescan_disable = 0;
host->ios.power_mode = MMC_POWER_UNDEFINED;
+ /* Workqueue for completing requests */
+ host->req_done_wq = alloc_workqueue("mmc%d-reqdone",
+ WQ_FREEZABLE | WQ_HIGHPRI | WQ_MEM_RECLAIM,
+ 0, host->index);
+ if (!host->req_done_wq) {
+ dev_err(mmc_dev(host), "could not allocate workqueue\n");
+ return;
+ }
if (!(host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)) {
mmc_claim_host(host);
@@ -2849,6 +2857,7 @@ void mmc_stop_host(struct mmc_host *host)
host->rescan_disable = 1;
cancel_delayed_work_sync(&host->detect);
+ destroy_workqueue(host->req_done_wq);
/* clear pm flags now and let card drivers set them as needed */
host->pm_flags = 0;
@@ -381,7 +381,6 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
INIT_DELAYED_WORK(&host->detect, mmc_rescan);
INIT_DELAYED_WORK(&host->sdio_irq_work, sdio_irq_work);
setup_timer(&host->retune_timer, mmc_retune_timer, (unsigned long)host);
-
/*
* By default, hosts do not support SGIO or large requests.
* They have to set these according to their abilities.
@@ -13,6 +13,7 @@
#include <linux/sched.h>
#include <linux/device.h>
#include <linux/fault-inject.h>
+#include <linux/workqueue.h>
#include <linux/mmc/core.h>
#include <linux/mmc/card.h>
@@ -423,6 +424,9 @@ struct mmc_host {
struct mmc_async_req *areq; /* active async req */
struct mmc_context_info context_info; /* async synchronization info */
+ /* finalization workqueue, handles finalizing requests */
+ struct workqueue_struct *req_done_wq;
+
/* Ongoing data transfer that allows commands during transfer */
struct mmc_request *ongoing_mrq;
As we want to complete requests autonomously from feeding the host with new requests, we create a workqueue to deal with this specifically in response to the callback from a host driver. This is necessary to exploit parallelism properly. This patch just adds the workqueu, later patches will make use of it. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- drivers/mmc/core/core.c | 9 +++++++++ drivers/mmc/core/host.c | 1 - include/linux/mmc/host.h | 4 ++++ 3 files changed, 13 insertions(+), 1 deletion(-)