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firewire: ohci: dump_stack() for PHY regs read/write failures

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A stack trace is an invaluable tool in determining the basis
and cause of PHY regs read/write failures.

Include PHY reg addr (and value for writes) in the diagnostic.

[Stefan R:  changed whitespace]

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Peter Hurley 2013-03-27 06:57:40 -04:00 committed by Stefan Richter
parent 67672134aa
commit 6fe9efb9c9
1 changed files with 4 additions and 2 deletions
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6
drivers/firewire/ohci.c
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@ -572,7 +572,8 @@ static int read_phy_reg(struct fw_ohci *ohci, int addr)
if (i >= 3)
msleep(1);
}
ohci_err(ohci, "failed to read phy reg\n");
ohci_err(ohci, "failed to read phy reg %d\n", addr);
dump_stack();
return -EBUSY;
}
@ -594,7 +595,8 @@ static int write_phy_reg(const struct fw_ohci *ohci, int addr, u32 val)
if (i >= 3)
msleep(1);
}
ohci_err(ohci, "failed to write phy reg\n");
ohci_err(ohci, "failed to write phy reg %d, val %u\n", addr, val);
dump_stack();
return -EBUSY;
}