mmc: sdhci-s3c: add spin_unlock_irq() before calling clk_round_rate

Before calling clk_round_rate(), put the spin_unlock_irq() in
sdhci_s3c_consider_clock() function.
Signed-off-by: NJaehoon Chung <jh80.chung@samsung.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-s3c.c

@@ -121,7 +121,9 @@ static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost,
 	 * speed possible with selected clock source and skip the division.
 	 */
 	if (ourhost->no_divider) {
+		spin_unlock_irq(&ourhost->host->lock);
 		rate = clk_round_rate(clksrc, wanted);
+		spin_lock_irq(&ourhost->host->lock);
 		return wanted - rate;
 	}