From: Ulf Hansson <ulf.hansson@linaro.org>
To: linux-mmc@vger.kernel.org, Ulf Hansson <ulf.hansson@linaro.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Douglas Anderson <dianders@chromium.org>,
Matthias Kaehlcke <mka@chromium.org>
Cc: Kalle Valo <kvalo@codeaurora.org>,
Tony Lindgren <tony@atomide.com>, Wen Gong <wgong@codeaurora.org>,
Erik Stromdahl <erik.stromdahl@gmail.com>,
Eyal Reizer <eyalreizer@gmail.com>,
linux-wireless@vger.kernel.org
Subject: [PATCH v2 0/3] mmc: Fixup HW reset for SDIO cards
Date: Sat, 9 Nov 2019 11:30:43 +0100 [thread overview]
Message-ID: <20191109103046.26445-1-ulf.hansson@linaro.org> (raw)
Changes in v2:
- Add adaptations to the mwifiex driver.
- Keep existing syncronous reset behaviour if the SDIO card has a single
func driver.
It has turned out that it's not a good idea to try to power cycle and to
re-initialize the SDIO card, as currently done through mmc_hw_reset(). This
because there may be multiple SDIO funcs attached to the same SDIO card and
some of the others that didn't execute the call to mmc_hw_reset(), may then
simply experience an undefined behaviour.
The following patches in this series attempts to address this problem, by
reworking the mmc_hw_reset() behaviour for SDIO and by adopting the Marvel
mwifiex driver to these changes.
Note that, I don't have the HW at hand so the the code has only compile tested.
Test on HW is greatly appreciated!
Ulf Hansson (3):
mwifiex: Re-work support for SDIO HW reset
mmc: core: Drop check for mmc_card_is_removable() in mmc_rescan()
mmc: core: Re-work HW reset for SDIO cards
drivers/mmc/core/core.c | 12 +++-----
drivers/mmc/core/core.h | 2 ++
drivers/mmc/core/sdio.c | 28 ++++++++++++++++-
drivers/mmc/core/sdio_bus.c | 9 +++++-
drivers/net/wireless/marvell/mwifiex/main.c | 6 +++-
drivers/net/wireless/marvell/mwifiex/main.h | 1 +
drivers/net/wireless/marvell/mwifiex/sdio.c | 33 ++++++++++++++-------
include/linux/mmc/card.h | 1 +
8 files changed, 70 insertions(+), 22 deletions(-)
--
2.17.1
next reply other threads:[~2019-11-09 10:31 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-09 10:30 Ulf Hansson [this message]
2019-11-09 10:30 ` [PATCH v2 1/3] mwifiex: Re-work support for SDIO HW reset Ulf Hansson
2019-11-12 0:33 ` Doug Anderson
2019-11-12 12:13 ` Ulf Hansson
2019-11-12 18:04 ` Doug Anderson
2019-11-13 15:00 ` Ulf Hansson
2019-11-09 10:30 ` [PATCH v2 2/3] mmc: core: Drop check for mmc_card_is_removable() in mmc_rescan() Ulf Hansson
2019-11-09 10:30 ` [PATCH v2 3/3] mmc: core: Re-work HW reset for SDIO cards Ulf Hansson
2019-11-12 0:33 ` Doug Anderson
2019-11-12 12:19 ` Ulf Hansson
2019-11-20 6:28 ` Kalle Valo
[not found] ` <87zhgr5af6.fsf@codeaurora.org>
2019-11-20 7:10 ` wgong
[not found] ` <6e6b53b28581a8f1a2944ca0bc65311e@codeaurora.org>
2019-11-20 7:20 ` Kalle Valo
[not found] ` <0101016e87aeb8b6-761ad812-5da7-4b0d-8cae-c69633d90de0-000000@us-west-2.amazonses.com>
2019-11-20 12:10 ` Ulf Hansson
2019-11-20 16:41 ` Kalle Valo
[not found] ` <87zhgqmref.fsf@kamboji.qca.qualcomm.com>
2019-11-21 2:29 ` wgong
2019-11-11 22:08 ` [PATCH v2 0/3] mmc: Fixup " Tony Lindgren
2019-11-12 12:23 ` Ulf Hansson
2019-11-12 18:00 ` Tony Lindgren
2019-11-12 0:51 ` Doug Anderson
2019-11-12 12:27 ` Ulf Hansson
2019-11-12 17:42 ` Doug Anderson
2019-11-13 15:11 ` Ulf Hansson
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