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ANDROID: mmc: sdio: Disable retuning in sdio_reset_comm()

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Since sdio_reset_comm() re-initializes the SDIO card, disable retuning
before idling and shutting down the card.  Tuning will be re-enabled (if
necessary) in mmc_sdio_init_card().

BUG=chrome-os-partner:46444
TEST=With CL:311815, toggle WiFi on/off on Smaug and observe that the
WiFi card comes back up and is able to tune successfully.

Change-Id: Ib4a5cfd4d75fc9e3ed7bb3f1e2ffd30de16c5d28
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/311797
Reviewed-by: Derek Basehore <dbasehore@chromium.org>

[briannorris: brought from Chromium kernel in 3.18 -> 4.4 rebase]

Signed-off-by: Brian Norris <briannorris@google.com>
This commit is contained in:
Andrew Bresticker
2015-11-10 14:11:46 -08:00
committed by Dmitry Shmidt
parent b5ea92ffa8
commit 4a623fb5ce
1 changed files with 3 additions and 0 deletions
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3
drivers/mmc/core/sdio.c
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@@ -22,6 +22,7 @@
#include "core.h"
#include "bus.h"
#include "host.h"
#include "sd.h"
#include "sdio_bus.h"
#include "mmc_ops.h"
@@ -1226,6 +1227,8 @@ int sdio_reset_comm(struct mmc_card *card)
printk("%s():\n", __func__);
mmc_claim_host(host);
mmc_retune_disable(host);
mmc_go_idle(host);
mmc_set_clock(host, host->f_min);