1 files changed, 7 insertions, 10 deletions

diff --git a/arch/arm/plat-omap/mux.c b/arch/arm/plat-omap/mux.c
index cbecd10d0b6..ea7b955b9c8 100644
--- a/arch/arm/plat-omap/mux.c
+++ b/arch/arm/plat-omap/mux.c
@@ -53,19 +53,13 @@ omap_cfg_reg(const reg_cfg_t reg_cfg)
                 return -EINVAL;
         }
 
-        cfg = &reg_cfg_table[reg_cfg];
-
-        /*
-         * We do a pretty long section here with lock on, but pin muxing
-         * should only happen on driver init for each driver, so it's not time
-         * critical.
-         */
-        spin_lock_irqsave(&mux_spin_lock, flags);
+        cfg = (reg_cfg_set *)&reg_cfg_table[reg_cfg];
 
         /* Check the mux register in question */
         if (cfg->mux_reg) {
                 unsigned        tmp1, tmp2;
 
+                spin_lock_irqsave(&mux_spin_lock, flags);
                 reg_orig = omap_readl(cfg->mux_reg);
 
                 /* The mux registers always seem to be 3 bits long */
@@ -80,11 +74,13 @@ omap_cfg_reg(const reg_cfg_t reg_cfg)
                         warn = 1;
 
                 omap_writel(reg, cfg->mux_reg);
+                spin_unlock_irqrestore(&mux_spin_lock, flags);
         }
 
         /* Check for pull up or pull down selection on 1610 */
         if (!cpu_is_omap1510()) {
                 if (cfg->pu_pd_reg && cfg->pull_val) {
+                        spin_lock_irqsave(&mux_spin_lock, flags);
                         pu_pd_orig = omap_readl(cfg->pu_pd_reg);
                         mask = 1 << cfg->pull_bit;
 
@@ -100,11 +96,13 @@ omap_cfg_reg(const reg_cfg_t reg_cfg)
                                 pu_pd = pu_pd_orig & ~mask;
                         }
                         omap_writel(pu_pd, cfg->pu_pd_reg);
+                        spin_unlock_irqrestore(&mux_spin_lock, flags);
                 }
         }
 
         /* Check for an associated pull down register */
         if (cfg->pull_reg) {
+                spin_lock_irqsave(&mux_spin_lock, flags);
                 pull_orig = omap_readl(cfg->pull_reg);
                 mask = 1 << cfg->pull_bit;
 
@@ -121,6 +119,7 @@ omap_cfg_reg(const reg_cfg_t reg_cfg)
                 }
 
                 omap_writel(pull, cfg->pull_reg);
+                spin_unlock_irqrestore(&mux_spin_lock, flags);
         }
 
         if (warn) {
@@ -149,8 +148,6 @@ omap_cfg_reg(const reg_cfg_t reg_cfg)
         }
 #endif
 
-        spin_unlock_irqrestore(&mux_spin_lock, flags);
-
 #ifdef CONFIG_OMAP_MUX_ERRORS
         return warn ? -ETXTBSY : 0;
 #else