Re: [PATCH] i2c: Add message transfer tracepoints for I2C and SMBUS

[David Howells]

Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:

> > Would it be possible to print this as a string rather than a number?
> > The protocol numbers are completely arbitrary, so the reader would have
> > to open i2c.h each time to figure out what is what.
> 
> That can be done in the TP_printk() with:
> 
> 	".. %s ..", ..,
> 	__print_symbolic(__entry->protocol,
> 		{ I2C_SMBUS_QUICK	,	"QUICK"	},
> 		{ I2C_SMBUS_BYTE	,	"BYTE"	},
> 		{ I2C_SMBUS_BYTE_DATA	,	"BYTE_DATA" },
> 		[...]
> 		{ I2C_SMBUS_I2C_BLOCK_DATA,	"I2C_BLOCK_DATA"}), ...

What happens if the number isn't in the table?

David
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