V4L/DVB (5987): saa7146: clean-up irq processing
Interrupt processing fixed: First handle interrupt, then acknowledge it.
Otherwise the same interrupt might occur twice.
Cleaned-up i2c interrupt handler and i2c error messages.
Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/common/saa7146_i2c.c b/drivers/media/common/saa7146_i2c.c
index f823286..7e7689a 100644
--- a/drivers/media/common/saa7146_i2c.c
+++ b/drivers/media/common/saa7146_i2c.c
@@ -202,7 +202,8 @@
/* a signal arrived */
return -ERESTARTSYS;
- printk(KERN_WARNING "saa7146_i2c_writeout: timed out waiting for end of xfer\n");
+ printk(KERN_WARNING "%s %s [irq]: timed out waiting for end of xfer\n",
+ dev->name, __FUNCTION__);
return -EIO;
}
status = saa7146_read(dev, I2C_STATUS);
@@ -219,7 +220,8 @@
break;
}
if (time_after(jiffies,timeout)) {
- printk(KERN_WARNING "saa7146_i2c_writeout: timed out waiting for MC2\n");
+ printk(KERN_WARNING "%s %s: timed out waiting for MC2\n",
+ dev->name, __FUNCTION__);
return -EIO;
}
}
@@ -235,7 +237,8 @@
/* this is normal when probing the bus
* (no answer from nonexisistant device...)
*/
- DEB_I2C(("saa7146_i2c_writeout: timed out waiting for end of xfer\n"));
+ printk(KERN_WARNING "%s %s [poll]: timed out waiting for end of xfer\n",
+ dev->name, __FUNCTION__);
return -EIO;
}
if (++trial < 50 && short_delay)
@@ -246,8 +249,16 @@
}
/* give a detailed status report */
- if ( 0 != (status & SAA7146_I2C_ERR)) {
+ if ( 0 != (status & (SAA7146_I2C_SPERR | SAA7146_I2C_APERR |
+ SAA7146_I2C_DTERR | SAA7146_I2C_DRERR |
+ SAA7146_I2C_AL | SAA7146_I2C_ERR |
+ SAA7146_I2C_BUSY)) ) {
+ if ( 0 == (status & SAA7146_I2C_ERR) ||
+ 0 == (status & SAA7146_I2C_BUSY) ) {
+ /* it may take some time until ERR goes high - ignore */
+ DEB_I2C(("unexpected i2c status %04x\n", status));
+ }
if( 0 != (status & SAA7146_I2C_SPERR) ) {
DEB_I2C(("error due to invalid start/stop condition.\n"));
}