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Subject[PATCH 2/2] mwifiex: Make use of the new sdio_trigger_replug() API to reset
Date
As described in the patch ("mmc: core: Add sdio_trigger_replug()
API"), the current mwifiex_sdio_card_reset() is broken in the cases
where we're running Bluetooth on a second SDIO func on the same card
as WiFi. The problem goes away if we just use the
sdio_trigger_replug() API call.

NOTE: Even though with this new solution there is less of a reason to
do our work from a workqueue (the unplug / plug mechanism we're using
is possible for a human to perform at any time so the stack is
supposed to handle it without it needing to be called from a special
context), we still need a workqueue because the Marvell reset function
could called from a context where sleeping is invalid and thus we
can't claim the host. One example is Marvell's wakeup_timer_fn().

Signed-off-by: Douglas Anderson <dianders@chromium.org>
---

drivers/net/wireless/marvell/mwifiex/sdio.c | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/marvell/mwifiex/sdio.c b/drivers/net/wireless/marvell/mwifiex/sdio.c
index 24c041dad9f6..f77ad2615f08 100644
--- a/drivers/net/wireless/marvell/mwifiex/sdio.c
+++ b/drivers/net/wireless/marvell/mwifiex/sdio.c
@@ -2218,14 +2218,6 @@ static void mwifiex_sdio_card_reset_work(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
struct sdio_func *func = card->func;
- int ret;
-
- mwifiex_shutdown_sw(adapter);
-
- /* power cycle the adapter */
- sdio_claim_host(func);
- mmc_hw_reset(func->card->host);
- sdio_release_host(func);

/* Previous save_adapter won't be valid after this. We will cancel
* pending work requests.
@@ -2233,9 +2225,9 @@ static void mwifiex_sdio_card_reset_work(struct mwifiex_adapter *adapter)
clear_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &card->work_flags);
clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &card->work_flags);

- ret = mwifiex_reinit_sw(adapter);
- if (ret)
- dev_err(&func->dev, "reinit failed: %d\n", ret);
+ sdio_claim_host(func);
+ sdio_trigger_replug(func);
+ sdio_release_host(func);
}

/* This function read/write firmware */
--
2.22.0.510.g264f2c817a-goog
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