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[media] em28xx: fix+improve the register (usb control message) debugging 

- avoid duplicate debugging messages in em28xx_read_reg_req_len()
- do not describe successful usb transfers in em28xx_read_reg_len()
  as "failed"
- report errors in em28xx_write_regs_req(), too
- print the usb error numbers, too

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Frank Schaefer 2017-04-26 13:43:12 -03:00 committed by Mauro Carvalho Chehab
parent 017725c702
commit 603c33a321
1 changed files with 18 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/media/usb/em28xx/em28xx-core.c
View File

@ -91,22 +91,16 @@ int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
if (len > URB_MAX_CTRL_SIZE)
return -EINVAL;
em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x ",
pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
req, 0, 0,
reg & 0xff, reg >> 8,
len & 0xff, len >> 8);
mutex_lock(&dev->ctrl_urb_lock);
ret = usb_control_msg(udev, pipe, req,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0x0000, reg, dev->urb_buf, len, HZ);
if (ret < 0) {
em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x failed\n",
em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x failed with error %i\n",
pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
req, 0, 0,
reg & 0xff, reg >> 8,
len & 0xff, len >> 8);
len & 0xff, len >> 8, ret);
mutex_unlock(&dev->ctrl_urb_lock);
return usb_translate_errors(ret);
}
@ -116,7 +110,7 @@ int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
mutex_unlock(&dev->ctrl_urb_lock);
em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x failed <<< %*ph\n",
em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x <<< %*ph\n",
pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
req, 0, 0,
reg & 0xff, reg >> 8,
@ -164,13 +158,6 @@ int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
if ((len < 1) || (len > URB_MAX_CTRL_SIZE))
return -EINVAL;
em28xx_regdbg("(pipe 0x%08x): OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph\n",
pipe,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
req, 0, 0,
reg & 0xff, reg >> 8,
len & 0xff, len >> 8, len, buf);
mutex_lock(&dev->ctrl_urb_lock);
memcpy(dev->urb_buf, buf, len);
ret = usb_control_msg(udev, pipe, req,
@ -178,8 +165,22 @@ int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
0x0000, reg, dev->urb_buf, len, HZ);
mutex_unlock(&dev->ctrl_urb_lock);
if (ret < 0)
if (ret < 0) {
em28xx_regdbg("(pipe 0x%08x): OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph failed with error %i\n",
pipe,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
req, 0, 0,
reg & 0xff, reg >> 8,
len & 0xff, len >> 8, len, buf, ret);
return usb_translate_errors(ret);
}
em28xx_regdbg("(pipe 0x%08x): OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph\n",
pipe,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
req, 0, 0,
reg & 0xff, reg >> 8,
len & 0xff, len >> 8, len, buf);
if (dev->wait_after_write)
msleep(dev->wait_after_write);