diff mbox series

[3/4] em28xx-core: Fix i2c error debug

Message ID 20210126015416.5622-4-brad@nextdimension.cc (mailing list archive)
State New, archived
Headers show
Series MaxLinear mxl692 demod-tuner / Hauppauge usb QuadHD | expand

Commit Message

Brad Love Jan. 26, 2021, 1:54 a.m. UTC 
Read errors are currently reported as write errors.

An incorrectly received read operation is never reported at all.
Add a debug statement indicating the request mismatch.

Signed-off-by: Brad Love <brad@nextdimension.cc>
---
Since v1:
- Was not in v1

 drivers/media/usb/em28xx/em28xx-i2c.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/media/usb/em28xx/em28xx-i2c.c b/drivers/media/usb/em28xx/em28xx-i2c.c
index 592b98b3643a..255395959255 100644
--- a/drivers/media/usb/em28xx/em28xx-i2c.c
+++ b/drivers/media/usb/em28xx/em28xx-i2c.c
@@ -294,6 +294,10 @@  static int em28xx_i2c_recv_bytes(struct em28xx *dev, u16 addr, u8 *buf, u16 len)
 			 "reading from i2c device at 0x%x failed (error=%i)\n",
 			 addr, ret);
 		return ret;
+	} else if (ret != len) {
+		dev_dbg(&dev->intf->dev,
+			"%i bytes read from i2c device at 0x%x requested, but %i bytes written\n",
+				ret, addr, len);
 	}
 	/*
 	 * NOTE: some devices with two i2c buses have the bad habit to return 0
@@ -329,7 +333,7 @@  static int em28xx_i2c_recv_bytes(struct em28xx *dev, u16 addr, u8 *buf, u16 len)
 	}
 
 	dev_warn(&dev->intf->dev,
-		 "write to i2c device at 0x%x failed with unknown error (status=%i)\n",
+		 "read from i2c device at 0x%x failed with unknown error (status=%i)\n",
 		 addr, ret);
 	return -EIO;
 }