1 files changed, 28 insertions, 7 deletions

diff --git a/arch/arm/mach-pxa/ssp.c b/arch/arm/mach-pxa/ssp.c
index 93096befd017..1fddfeaa630d 100644
--- a/arch/arm/mach-pxa/ssp.c
+++ b/arch/arm/mach-pxa/ssp.c
@@ -40,6 +40,8 @@
 
 #define PXA_SSP_PORTS   3
 
+#define TIMEOUT 100000
+
 struct ssp_info_ {
         int irq;
         u32 clock;
@@ -92,13 +94,18 @@ static irqreturn_t ssp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
  * The caller is expected to perform the necessary locking.
  *
  * Returns:
- *   %-ETIMEDOUT        timeout occurred (for future)
+ *   %-ETIMEDOUT        timeout occurred
  *   0                  success
  */
 int ssp_write_word(struct ssp_dev *dev, u32 data)
 {
-        while (!(SSSR_P(dev->port) & SSSR_TNF))
+        int timeout = TIMEOUT;
+
+        while (!(SSSR_P(dev->port) & SSSR_TNF)) {
+                if (!--timeout)
+                        return -ETIMEDOUT;
                 cpu_relax();
+        }
 
         SSDR_P(dev->port) = data;
 
@@ -117,15 +124,21 @@ int ssp_write_word(struct ssp_dev *dev, u32 data)
  * The caller is expected to perform the necessary locking.
  *
  * Returns:
- *   %-ETIMEDOUT        timeout occurred (for future)
+ *   %-ETIMEDOUT        timeout occurred
  *   32-bit data        success
  */
-int ssp_read_word(struct ssp_dev *dev)
+int ssp_read_word(struct ssp_dev *dev, u32 *data)
 {
-        while (!(SSSR_P(dev->port) & SSSR_RNE))
+        int timeout = TIMEOUT;
+
+        while (!(SSSR_P(dev->port) & SSSR_RNE)) {
+                if (!--timeout)
+                        return -ETIMEDOUT;
                 cpu_relax();
+        }
 
-        return SSDR_P(dev->port);
+        *data = SSDR_P(dev->port);
+        return 0;
 }
 
 /**
@@ -136,13 +149,21 @@ int ssp_read_word(struct ssp_dev *dev)
  *
  * The caller is expected to perform the necessary locking.
  */
-void ssp_flush(struct ssp_dev *dev)
+int ssp_flush(struct ssp_dev *dev)
 {
+        int timeout = TIMEOUT * 2;
+
         do {
                 while (SSSR_P(dev->port) & SSSR_RNE) {
+                        if (!--timeout)
+                                return -ETIMEDOUT;
                         (void) SSDR_P(dev->port);
                 }
+                if (!--timeout)
+                        return -ETIMEDOUT;
         } while (SSSR_P(dev->port) & SSSR_BSY);
+
+        return 0;
 }
 
 /**