Bug 8387

Summary: dmesg error: stmmac_dvr_probe: warning: cannot get CSR clock on intel-quark Galileo v2
Product: [Build System, Metadata & Runtime] BSPs Reporter: Cristina Agurida <cristina-danielax.agurida>
Component: bsps-meta-intelAssignee: Saul Wold <sgw>
Status: VERIFIED NOTABUG QA Contact: Cristina Agurida <cristina-danielax.agurida>
Severity: normal    
Priority: Medium CC: alexandru.c.georgescu, dvhart, georgex.l.musat
Version: 1.9   
Target Milestone: 2.1   
Hardware: Galileo   
OS: x86   
Whiteboard:
OS type for building Yocto: --- Type of Regression: New (Never tested)
Verified: Documentation change: No (bug/feature does not impact docs)

Description Cristina Agurida 2015-09-24 08:17:26 UTC 
BUILD: 1.9_M3.rc1: meta-intel: cea00968b858b60222d68103491f076067d73876
                   poky: ea562de57590c966cd5a75fda8defecd397e6436
IMAGE: core-image-sato-sdk
ENVIRONMENT: intel-quark on Galileo v.2
STEPS TO REPRODUCE: 
  
Parse dmesg log and all log files in /var/log for keywords like: "error" , "failed" , "cannot", "can't" etc.
Filter out the known and invalid errors or errors that appear in certain situations and need to be ignored.



EXPECTED OUTCOME: 
  
No errors or fails should be present in logs

ACTUAL OUTCOME:

This error appears on dmesg log:

Log: dmesg
-----------------------
Central error: [    9.473989] stmmaceth 0000:00:14.6: stmmac_dvr_probe: warning: cannot get CSR clock
***********************
[    9.413328] intel_quark_mfd_i2c_gpio 0000:00:15.2: enabling device (0000 -> 0002)
[    9.424827] Uniform Multi-Platform E-IDE driver
[    9.429464] ide-gd driver 1.18
[    9.431837] ide-cd driver 5.00
[    9.437171] CAN device driver interface
[    9.440705] pcnet32: pcnet32.c:v1.35 21.Apr.2008 tsbogend@alpha.franken.de
[    9.447662] e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k8-NAPI
[    9.453794] e1000: Copyright (c) 1999-2006 Intel Corporation.
[    9.459117] pch_gbe: EG20T PCH Gigabit Ethernet Driver - version 1.01
[    9.466003] stmmaceth 0000:00:14.6: enabling device (0000 -> 0002)
[    9.473989] stmmaceth 0000:00:14.6: stmmac_dvr_probe: warning: cannot get CSR clock
[    9.480787] stmmaceth 0000:00:14.6: no reset control found
[    9.485213] stmmac - user ID: 0x10, Synopsys ID: 0x37
[    9.489153]  Ring mode enabled
[    9.491200]  DMA HW capability register supported
[    9.494514]  Enhanced/Alternate descriptors
[    9.497878] 	Enabled extended descriptors
[    9.500898]  RX Checksum Offload Engine supported (type 2)
[    9.505300]  TX Checksum insertion supported
[    9.508443]  Enable RX Mitigation via HW Watchdog Timer
[    9.529857] libphy: stmmac: probed
Comment 1 Saul Wold 2015-10-22 00:04:41 UTC 
Based on my research into the stmmac driver and code history this is a benign message and can be ignored (and whitelisted in our test system).

The comment after this warning:

/* If failed to obtain stmmac_clk and specific clk_csr value
 * is NOT passed from the platform, probe fail.

The clk_csr value is passed and is valid so the probe continues successfully.
Comment 2 Cristina Agurida 2015-11-24 14:52:13 UTC 
As per last comment set it as verified.