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| author | Stefan Wahren <stefan.wahren@i2se.com> | 2018-05-04 20:09:05 +0200 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-05-15 10:17:00 +0300 |
| commit | 971b750d31079e13c18e4ac335804401cfeb189d (patch) | |
| tree | d3606754a9de7285ccffeec8efb4c6d3a2cbfdd3 /drivers/usb/dwc2/debugfs.c | |
| parent | d5d5f079138254e4d641de2f36760d0d0fc9f510 (diff) | |
| download | linux-stable-971b750d31079e13c18e4ac335804401cfeb189d.tar.gz linux-stable-971b750d31079e13c18e4ac335804401cfeb189d.tar.bz2 linux-stable-971b750d31079e13c18e4ac335804401cfeb189d.zip | |
usb: dwc2: debugfs: Don't touch RX FIFO during register dump
Dumping the registers via debugfs makes USB on Raspberry Pi completely
unusable. The read of register GRXSTSP ("Receive Status Read and Pop
Register") is responsible for this behaviour, because it pops the RX FIFO.
So avoid this by omitting the relevant register.
CC: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Fixes: 563cf017c443 ("usb: dwc2: debugfs: add support for complete register dump")
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2/debugfs.c')
| -rw-r--r-- | drivers/usb/dwc2/debugfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/dwc2/debugfs.c b/drivers/usb/dwc2/debugfs.c index 5897333600a7..a21f89354434 100644 --- a/drivers/usb/dwc2/debugfs.c +++ b/drivers/usb/dwc2/debugfs.c @@ -368,7 +368,7 @@ static const struct debugfs_reg32 dwc2_regs[] = { dump_register(GINTSTS), dump_register(GINTMSK), dump_register(GRXSTSR), - dump_register(GRXSTSP), + /* Omit GRXSTSP */ dump_register(GRXFSIZ), dump_register(GNPTXFSIZ), dump_register(GNPTXSTS), |