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// SPDX-License-Identifier: GPL-2.0+
* Driver for USB Mass Storage compliant devices
* Debugging Functions Header File
* Current development and maintenance by:
* (c) 1999-2002 Matthew Dharm (
* Initial work by:
* (c) 1999 Michael Gee (
* This driver is based on the 'USB Mass Storage Class' document. This
* describes in detail the protocol used to communicate with such
* devices. Clearly, the designers had SCSI and ATAPI commands in
* mind when they created this document. The commands are all very
* similar to commands in the SCSI-II and ATAPI specifications.
* It is important to note that in a number of cases this class
* exhibits class-specific exemptions from the USB specification.
* Notably the usage of NAK, STALL and ACK differs from the norm, in
* that they are used to communicate wait, failed and OK on commands.
* Also, for certain devices, the interrupt endpoint is used to convey
* status of a command.
#ifndef _DEBUG_H_
#define _DEBUG_H_
#include <linux/kernel.h>
void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb);
void usb_stor_show_sense(const struct us_data *us, unsigned char key,
unsigned char asc, unsigned char ascq);
__printf(2, 3) void usb_stor_dbg(const struct us_data *us,
const char *fmt, ...);
#define US_DEBUG(x) x
__printf(2, 3)
static inline void _usb_stor_dbg(const struct us_data *us,
const char *fmt, ...)
#define usb_stor_dbg(us, fmt, ...) \
do { if (0) _usb_stor_dbg(us, fmt, ##__VA_ARGS__); } while (0)
#define US_DEBUG(x)