From 58d1246db340793c408b22884598e4ce4d1d4aba Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Tue, 28 Jun 2011 17:16:03 +0300 Subject: [PATCH] mmc: sdhci: specify maximum discard timeout In general, SDHC hardware timeout cannot be avoided. Accordingly, the maximum timeout is specified to limit the maximum discard size. Signed-off-by: Adrian Hunter Signed-off-by: Chris Ball --- drivers/mmc/host/sdhci.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index aa25eae65402..c31a3343340d 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2509,6 +2509,11 @@ int sdhci_add_host(struct sdhci_host *host) } else mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_200; + if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK) + mmc->max_discard_to = (1 << 27) / (mmc->f_max / 1000); + else + mmc->max_discard_to = (1 << 27) / host->timeout_clk; + mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23; if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)