From mboxrd@z Thu Jan 1 00:00:00 1970 From: Venkatraman S Subject: [PATCH v2 09/16] mmc: core: Add MMC abort interface Date: Thu, 3 May 2012 19:53:08 +0530 Message-ID: <1336054995-22988-10-git-send-email-svenkatr@ti.com> References: <1336054995-22988-1-git-send-email-svenkatr@ti.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , , , , , Venkatraman S To: , , , , Return-path: In-Reply-To: <1336054995-22988-1-git-send-email-svenkatr@ti.com> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org 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 --- 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org