[PATCH v2 09/16] mmc: core: Add MMC abort interface
From: Venkatraman S <hidden>
Date: 2012-05-03 14:23:08
Also in:
linux-fsdevel, linux-mm, linux-mmc, lkml
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, the rest · Maintainers:
Ulf Hansson, Linus Torvalds
HPI (and possibly other) procedures require that an ongoing mmc request issued to a controller be aborted in the middle of a transaction. Define a abort interface function to the controller so that individual host controllers can safely abort a request, stop the dma and cleanup their statemachine etc. The implementation is controller dependant Signed-off-by: Venkatraman S <redacted> --- drivers/mmc/core/core.c | 8 ++++++++ include/linux/mmc/host.h | 1 + 2 files changed, 9 insertions(+)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index b4152ca..3f0e927 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c@@ -328,6 +328,14 @@ static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, } } +static int mmc_abort_req(struct mmc_host *host, struct mmc_request *req) +{ + if (host->ops->abort_req) + return host->ops->abort_req(host, req); + + return -ENOSYS; +} + /** * mmc_start_req - start a non-blocking request * @host: MMC host to start command
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 0707d22..d700703 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h@@ -98,6 +98,7 @@ struct mmc_host_ops { int err); void (*pre_req)(struct mmc_host *host, struct mmc_request *req, bool is_first_req); + int (*abort_req)(struct mmc_host *host, struct mmc_request *req); void (*request)(struct mmc_host *host, struct mmc_request *req); /* * Avoid calling these three functions too often or in a "fast path",
--
1.7.10.rc2
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