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Subject[PATCH 4.2.y-ckt 132/206] mmc: longer timeout for long read time quirk
Date
4.2.8-ckt12 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Matt Gumbel <matthew.k.gumbel@intel.com>

commit 32ecd320db39bcb007679ed42f283740641b81ea upstream.

008GE0 Toshiba mmc in some Intel Baytrail tablets responds to
MMC_SEND_EXT_CSD in 450-600ms.

This patch will...

() Increase the long read time quirk timeout from 300ms to 600ms. Original
author of that quirk says 300ms was only a guess and that the number
may need to be raised in the future.

() Add this specific MMC to the quirk

Signed-off-by: Matt Gumbel <matthew.k.gumbel@intel.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
drivers/mmc/card/block.c | 5 +++--
drivers/mmc/core/core.c | 4 ++--
2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 88c4e08..18fb6cd 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -2411,11 +2411,12 @@ static const struct mmc_fixup blk_fixups[] =
MMC_QUIRK_BLK_NO_CMD23),

/*
- * Some Micron MMC cards needs longer data read timeout than
- * indicated in CSD.
+ * Some MMC cards need longer data read timeout than indicated in CSD.
*/
MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
MMC_QUIRK_LONG_READ_TIME),
+ MMC_FIXUP("008GE0", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
+ MMC_QUIRK_LONG_READ_TIME),

/*
* On these Samsung MoviNAND parts, performing secure erase or
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 2f4503a..1f1c42a 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -866,11 +866,11 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
/*
* Some cards require longer data read timeout than indicated in CSD.
* Address this by setting the read timeout to a "reasonably high"
- * value. For the cards tested, 300ms has proven enough. If necessary,
+ * value. For the cards tested, 600ms has proven enough. If necessary,
* this value can be increased if other problematic cards require this.
*/
if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) {
- data->timeout_ns = 300000000;
+ data->timeout_ns = 600000000;
data->timeout_clks = 0;
}

--
2.7.4
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