Hi Russell,

On Thu, Jan 16, 2014 at 9:46 AM, Russell King - ARM Linux
[off-list ref] wrote:

======================================================
[ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ]
3.13.0-rc7+ #401 Not tainted
------------------------------------------------------
kworker/u8:1/44 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
 (prepare_lock){+.+.+.}, at: [<c04d10d4>] clk_prepare_lock+0x80/0xf4

and this task is already holding:
 (&(&host->lock)->rlock){-.-...}, at: [<c04b0528>] sdhci_do_set_ios+0x20/0x740
which would create a new lock dependency:
 (&(&host->lock)->rlock){-.-...} -> (prepare_lock){+.+.+.}

Please apply this patch:
https://git.kernel.org/cgit/linux/kernel/git/cjb/mmc.git/commit/?h=mmc-next&id=a974862faee199cba3ff36b5a148df5fd34bd1e7

Regards,

Fabio Estevam