[PATCH 04/11] Show timeouts on I2C transfers.

[Steinar H. Gunderson]

From: "Steinar H. Gunderson" <se...@samfundet.no>

On I2C reads and writes, show if we had any timeouts in the debug output.

Signed-off-by: Steinar H. Gunderson <se...@samfundet.no>
---
 drivers/media/dvb/mantis/mantis_i2c.c |   26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/media/dvb/mantis/mantis_i2c.c 
b/drivers/media/dvb/mantis/mantis_i2c.c
index e779451..ddd1922 100644
--- a/drivers/media/dvb/mantis/mantis_i2c.c
+++ b/drivers/media/dvb/mantis/mantis_i2c.c
@@ -38,6 +38,7 @@
 static int mantis_i2c_read(struct mantis_pci *mantis, const struct i2c_msg 
*msg)
 {
        u32 rxd, i, stat, trials;
+       u32 timeouts = 0;
 
        dprintk(MANTIS_INFO, 0, "        %s:  Address=[0x%02x] <R>[ ",
                __func__, msg->addr);
@@ -60,6 +61,9 @@ static int mantis_i2c_read(struct mantis_pci *mantis, const 
struct i2c_msg *msg)
                        if (stat & MANTIS_INT_I2CDONE)
                                break;
                }
+               if (trials == TRIALS) {
+                       ++timeouts;
+               }
 
                dprintk(MANTIS_TMG, 0, "I2CDONE: trials=%d\n", trials);
 
@@ -69,6 +73,9 @@ static int mantis_i2c_read(struct mantis_pci *mantis, const 
struct i2c_msg *msg)
                        if (stat & MANTIS_INT_I2CRACK)
                                break;
                }
+               if (trials == TRIALS) {
+                       ++timeouts;
+               }
 
                dprintk(MANTIS_TMG, 0, "I2CRACK: trials=%d\n", trials);
 
@@ -76,7 +83,11 @@ static int mantis_i2c_read(struct mantis_pci *mantis, const 
struct i2c_msg *msg)
                msg->buf[i] = (u8)((rxd >> 8) & 0xFF);
                dprintk(MANTIS_INFO, 0, "%02x ", msg->buf[i]);
        }
-       dprintk(MANTIS_INFO, 0, "]\n");
+       if (timeouts) {
+               dprintk(MANTIS_INFO, 0, "] %d timeouts\n", timeouts);
+       } else {
+               dprintk(MANTIS_INFO, 0, "]\n");
+       }
 
        return 0;
 }
@@ -85,6 +96,7 @@ static int mantis_i2c_write(struct mantis_pci *mantis, const 
struct i2c_msg *msg
 {
        int i;
        u32 txd = 0, stat, trials;
+       u32 timeouts = 0;
 
        dprintk(MANTIS_INFO, 0, "        %s: Address=[0x%02x] <W>[ ",
                __func__, msg->addr);
@@ -108,6 +120,9 @@ static int mantis_i2c_write(struct mantis_pci *mantis, 
const struct i2c_msg *msg
                        if (stat & MANTIS_INT_I2CDONE)
                                break;
                }
+               if (trials == TRIALS) {
+                       ++timeouts;
+               }
 
                dprintk(MANTIS_TMG, 0, "I2CDONE: trials=%d\n", trials);
 
@@ -117,10 +132,17 @@ static int mantis_i2c_write(struct mantis_pci *mantis, 
const struct i2c_msg *msg
                        if (stat & MANTIS_INT_I2CRACK)
                                break;
                }
+               if (trials == TRIALS) {
+                       ++timeouts;
+               }
 
                dprintk(MANTIS_TMG, 0, "I2CRACK: trials=%d\n", trials);
        }
-       dprintk(MANTIS_INFO, 0, "]\n");
+       if (timeouts) {
+               dprintk(MANTIS_INFO, 0, "] %d timeouts\n", timeouts);
+       } else {
+               dprintk(MANTIS_INFO, 0, "]\n");
+       }
 
        return 0;
 }
-- 
1.7.9.5

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