From 18489fa2ba4c170d96ffc1a41f7b9002dcb983b7 Mon Sep 17 00:00:00 2001 From: Martin Fuzzey Date: Thu, 16 Apr 2009 22:00:36 +0200 Subject: [PATCH] mxcmmc : Reset the SDHC hardware if software timeout occurs. When a software timeout occurs in polling mode hardware was left in an indeterminate state causing subsequent operations to block. Signed-off-by: Martin Fuzzey --- drivers/mmc/host/mxcmmc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c index 5950102..dcc9cdb 100644 --- a/drivers/mmc/host/mxcmmc.c +++ b/drivers/mmc/host/mxcmmc.c @@ -140,6 +140,8 @@ struct mxcmci_host { struct work_struct datawork; }; +static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios); + static inline int mxcmci_use_dma(struct mxcmci_host *host) { return host->do_dma; @@ -345,8 +347,11 @@ static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask) stat = readl(host->base + MMC_REG_STATUS); if (stat & STATUS_ERR_MASK) return stat; - if (time_after(jiffies, timeout)) + if (time_after(jiffies, timeout)) { + mxcmci_softreset(host); + mxcmci_set_clk_rate(host, host->clock); return STATUS_TIME_OUT_READ; + } if (stat & mask) return 0; cpu_relax(); -- 1.8.2.3