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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>
This commit is contained in:
Balaji T K 2014-01-21 19:54:42 +05:30 committed by Chris Ball
parent 4ea42235b5
commit 6e3076c27d
1 changed files with 3 additions and 1 deletions
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4
drivers/mmc/host/omap_hsmmc.c
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@ -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;