linux-kernel - [PATCH v2 0/3] Introduce the request

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Date:   Tue, 17 Mar 2020 18:14:08 +0800
From:   Baolin Wang <baolin.wang7@...il.com>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org
Cc:     orsonzhai@...il.com, zhang.lyra@...il.com, baolin.wang7@...il.com,
        arnd@...db.de, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/3] Introduce the request_atomic() for the host

This patch set introduces a new request_atomic() interface for the
MMC host controller, which is used to submit a request to host in
the atomic context, such as in the irq hard handler, to reduce the
request latency.

Any comments are welcome. Thanks.

Note: Adrian pointed out that it is not good if moving the polling of
inhibit bits in sdhci_send_command() into the interrupt context, but
now I have not found a better way to address Adrian's concern. Moveover
this is an unusual abnormal case and the original code has the same
problem, so I plan to create another patch set to talk about and fix
this issue.

Changes from v1:
 - Re-split the changes to make them more clear suggested by Ulf.
 - Factor out the auto CMD23 checking into a separate function.

Baolin Wang (3):
  mmc: host: Introduce the request_atomic() for the host
  mmc: host: sdhci: Implement the request_atomic() API
  mmc: host: sdhci-sprd: Implement the request_atomic() API

 drivers/mmc/host/mmc_hsq.c    |  5 ++++-
 drivers/mmc/host/sdhci-sprd.c | 23 ++++++++++++++++++++---
 drivers/mmc/host/sdhci.c      | 27 +++++++++++++++++++--------
 drivers/mmc/host/sdhci.h      |  1 +
 include/linux/mmc/host.h      |  3 +++
 5 files changed, 47 insertions(+), 12 deletions(-)

-- 
1.9.1