diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c
index 5067e067e906..bd882c45385b 100644
--- a/drivers/clk/clk-fractional-divider.c
+++ b/drivers/clk/clk-fractional-divider.c
@@ -195,14 +195,14 @@ static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate,
 		n--;
 	}
 
+	mmask = GENMASK(fd->mwidth - 1, 0) << fd->mshift;
+	nmask = GENMASK(fd->nwidth - 1, 0) << fd->nshift;
+
 	if (fd->lock)
 		spin_lock_irqsave(fd->lock, flags);
 	else
 		__acquire(fd->lock);
 
-	mmask = GENMASK(fd->mwidth - 1, 0) << fd->mshift;
-	nmask = GENMASK(fd->nwidth - 1, 0) << fd->nshift;
-
 	val = clk_fd_readl(fd);
 	val &= ~(mmask | nmask);
 	val |= (m << fd->mshift) | (n << fd->nshift);