077af794d9
The old URL for usb-storage driver help is long gone. So remove it from the comments to not confuse people anymore. Reported-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for USB Mass Storage compliant devices
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* Debugging Functions Header File
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*
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* Current development and maintenance by:
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* (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
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*
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* Initial work by:
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* (c) 1999 Michael Gee (michael@linuxspecific.com)
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*
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* This driver is based on the 'USB Mass Storage Class' document. This
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* describes in detail the protocol used to communicate with such
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* devices. Clearly, the designers had SCSI and ATAPI commands in
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* mind when they created this document. The commands are all very
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* similar to commands in the SCSI-II and ATAPI specifications.
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*
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* It is important to note that in a number of cases this class
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* exhibits class-specific exemptions from the USB specification.
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* Notably the usage of NAK, STALL and ACK differs from the norm, in
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* that they are used to communicate wait, failed and OK on commands.
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*
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* Also, for certain devices, the interrupt endpoint is used to convey
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* status of a command.
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*/
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#ifndef _DEBUG_H_
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#define _DEBUG_H_
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#include <linux/kernel.h>
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#define USB_STORAGE "usb-storage: "
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#ifdef CONFIG_USB_STORAGE_DEBUG
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void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb);
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void usb_stor_show_sense(const struct us_data *us, unsigned char key,
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unsigned char asc, unsigned char ascq);
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__printf(2, 3) void usb_stor_dbg(const struct us_data *us,
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const char *fmt, ...);
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#define US_DEBUG(x) x
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#else
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__printf(2, 3)
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static inline void _usb_stor_dbg(const struct us_data *us,
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const char *fmt, ...)
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{
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}
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#define usb_stor_dbg(us, fmt, ...) \
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do { if (0) _usb_stor_dbg(us, fmt, ##__VA_ARGS__); } while (0)
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#define US_DEBUG(x)
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#endif
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#endif
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