From: Balaji T K Date: Tue, 21 Jan 2014 14:24:42 +0000 (+0530) Subject: mmc: omap_hsmmc: save clock rate to use in interrupt context X-Git-Tag: firefly_0821_release~176^2~4096^2~24 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6e3076c27da0ac653dda6503dadd2852c2d0eac1;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Chris Ball --- diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index d9c84ea46b63..6cb4e19dcf07 100644 --- 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;