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Subjectstable regression: tda18271_read_regs: [1-0060|M] ERROR: i2c_transfer returned: -19
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[My excuses for multiposting, it seems gmane does not permit posting to all
the relevant lists]

Since upgrading my system from Linux 3.12 to 3.12.3, my PCTV Systems
nanoStick T2 290e does not work anymore.

This happens with 3.12.3:

[ 3.778817] em28174 #0: i2c eeprom 0000: 26 00 01 00 02 09 d8 85 80 80 e5 80 f4 f5 94 90
[ 3.779741] em28174 #0: i2c eeprom 0010: 78 0d e4 f0 f5 46 12 00 5a c2 eb c2 e8 30 e9 03
[ 3.780643] em28174 #0: i2c eeprom 0020: 12 09 de 30 eb 03 12 09 10 30 ec f1 12 07 72 80
[ 3.781562] em28174 #0: i2c eeprom 0030: ec 00 60 00 e5 f5 64 01 60 09 e5 f5 64 09 60 03
[ 3.782473] em28174 #0: i2c eeprom 0040: c2 c6 22 e5 f7 b4 03 13 e5 f6 b4 87 03 02 09 92
[ 3.783406] em28174 #0: i2c eeprom 0050: e5 f6 b4 93 03 02 07 e6 c2 c6 22 c2 c6 22 12 09
[ 3.784314] em28174 #0: i2c eeprom 0060: cf 02 06 19 1a eb 67 95 13 20 4f 02 c0 13 6b 10
[ 3.785213] em28174 #0: i2c eeprom 0070: a0 1a ba 14 ce 1a 39 57 00 5c 18 00 00 00 00 00
[ 3.786140] em28174 #0: i2c eeprom 0080: 00 00 00 00 44 36 00 00 f0 10 02 00 00 00 00 00
[ 3.787057] em28174 #0: i2c eeprom 0090: 5b 23 c0 00 00 00 20 40 20 80 02 20 01 01 00 00
[ 3.787970] em28174 #0: i2c eeprom 00a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 3.788879] em28174 #0: i2c eeprom 00b0: c6 40 00 00 00 00 a7 00 00 00 00 00 00 00 00 00
[ 3.789790] em28174 #0: i2c eeprom 00c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 38 32
[ 3.790709] em28174 #0: i2c eeprom 00d0: 34 31 30 31 31 36 36 30 31 37 31 32 32 31 46 4b
[ 3.791625] em28174 #0: i2c eeprom 00e0: 4a 31 00 4f 53 49 30 30 33 30 38 44 30 31 31 30
[ 3.792531] em28174 #0: i2c eeprom 00f0: 46 4b 4a 31 00 00 00 00 00 00 00 00 00 00 31 30
[ 3.793444] em28174 #0: i2c eeprom 0100: ... (skipped)
[ 3.793502] em28174 #0: EEPROM ID = 26 00 01 00, EEPROM hash = 0xfcf432bb
[ 3.793559] em28174 #0: EEPROM info:
[ 3.793616] em28174 #0: microcode start address = 0x0004, boot configuration = 0x01
[ 3.804741] scsi 8:0:0:0: Direct-Access Generic Ultra HS-SD/MMC 1.82 PQ: 0 ANSI: 0
[ 3.805345] sd 8:0:0:0: Attached scsi generic sg3 type 0
[ 3.818139] em28174 #0: No audio on board.
[ 3.818194] em28174 #0: 500mA max power
[ 3.818247] em28174 #0: Table at offset 0x39, strings=0x1aa0, 0x14ba, 0x1ace
[ 3.818318] em28174 #0: Identified as PCTV nanoStick T2 290e (card=78)
[ 3.818374] em28174 #0: v4l2 driver version 0.2.0
[ 3.821522] sd 8:0:0:0: [sdc] Attached SCSI removable disk
[ 3.823606] em28174 #0: V4L2 video device registered as video0
[ 3.823662] em28174 #0: dvb set to isoc mode.
[ 3.823972] usbcore: registered new interface driver em28xx
[ 3.844020] tda18271 1-0060: creating new instance
[ 3.868422] tda18271_read_regs: [1-0060|M] ERROR: i2c_transfer returned: -19
[ 3.868492] Error reading device ID @ 1-0060, bailing out.
[ 3.868548] tda18271_attach: [1-0060|M] error -5 on line 1285
[ 3.868603] tda18271 1-0060: destroying instance
[ 3.868666] Em28xx: Initialized (Em28xx dvb Extension) extension
[ 3.894687] Registered IR keymap rc-pinnacle-pctv-hd
[ 3.894819] input: em28xx IR (em28174 #0) as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.7/rc/rc0/input23
[ 3.894979] rc0: em28xx IR (em28174 #0) as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.7/rc/rc0
[ 3.895570] Em28xx: Initialized (Em28xx Input Extension) extension

I see the same problem reported here:
https://github.com/Hexxeh/rpi-firmware/issues/38 where it is mentioned
that this regression also appeared in 3.10 stable series recently.

I noticed upstream commit 8393796dfa4cf5dffcceec464c7789bec3a2f471
(media: dvb-frontends: Don't use dynamic static allocation)
entered both 3.10.22 (which is the first version introducing the
regression in 3.10 stable according to the linked bug), and 3.12.3.
This file contains stuff related to tda18271. Could this be the
culprit?

--
Frederik Himpe




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