mmc: omap_hsmmc: save clock rate to use in interrupt context

clk_get_rate throws DEBUG_LOCKS_WARN_ON(in_interrupt()) warning
if called from interrupt context.
use cached clock rate in set_data_timeout, so that
set_data_timeout can be called from interrupt context.

Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Chris Ball <chris@printf.net>

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index d9c84ea46b63c19b56c37937cb52fc2a533d8012..6cb4e19dcf072efae3fa0cc9c856e04cedbe9013 100644 (file)
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -192,6 +192,7 @@ struct omap_hsmmc_host {
        int                     reqs_blocked;
        int                     use_reg;
        int                     req_in_progress;
+       unsigned long           clk_rate;
        struct omap_hsmmc_next  next_data;
        struct  omap_mmc_platform_data  *pdata;
 };
@@ -1360,7 +1361,7 @@ static void set_data_timeout(struct omap_hsmmc_host *host,
        if (clkd == 0)
                clkd = 1;
 
-       cycle_ns = 1000000000 / (clk_get_rate(host->fclk) / clkd);
+       cycle_ns = 1000000000 / (host->clk_rate / clkd);
        timeout = timeout_ns / cycle_ns;
        timeout += timeout_clks;
        if (timeout) {
@@ -1484,6 +1485,7 @@ static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req)
                host->reqs_blocked = 0;
        WARN_ON(host->mrq != NULL);
        host->mrq = req;
+       host->clk_rate = clk_get_rate(host->fclk);
        err = omap_hsmmc_prepare_data(host, req);
        if (err) {
                req->cmd->error = err;