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Date: Fri, 1 Apr 2016 17:53:06 -0700 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Adrian Hunter <adrian.hunter@...el.com>, Ulf Hansson <ulf.hansson@...aro.org>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 3.19.y-ckt 100/170] mmc: sdhci: Fix override of timeout clk wrt max_busy_timeout 3.19.8-ckt18 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Adrian Hunter <adrian.hunter@...el.com> commit 995136247915c5cee633d55ba23f6eebf67aa567 upstream. Normally the timeout clock frequency is read from the capabilities register. It is also possible to set the value prior to calling sdhci_add_host() in which case that value will override the capabilities register value. However that was being done after calculating max_busy_timeout so that max_busy_timeout was being calculated using the wrong value of timeout_clk. Fix that by moving the override before max_busy_timeout is calculated. The result is that the max_busy_timeout and max_discard increase for BSW devices so that, for example, the time for mkfs.ext4 on a 64GB eMMC drops from about 1 minute 40 seconds to about 20 seconds. Note, in the future, the capabilities setting will be tidied up and this override won't be used anymore. However this fix is needed for stable. Signed-off-by: Adrian Hunter <adrian.hunter@...el.com> Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- drivers/mmc/host/sdhci.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index f68de85..17d79d8 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -3080,14 +3080,14 @@ int sdhci_add_host(struct sdhci_host *host) if (caps[0] & SDHCI_TIMEOUT_CLK_UNIT) host->timeout_clk *= 1000; + if (override_timeout_clk) + host->timeout_clk = override_timeout_clk; + mmc->max_busy_timeout = host->ops->get_max_timeout_count ? host->ops->get_max_timeout_count(host) : 1 << 27; mmc->max_busy_timeout /= host->timeout_clk; } - if (override_timeout_clk) - host->timeout_clk = override_timeout_clk; - mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23; mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD; -- 2.7.4
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