USB: cleanups for g_file_storage
This patch (as957) makes some minor cleanups to the g_file_storage driver: Update the copyright date and version string; Uniformize the logging macros for the gadget and the LUNs; Remove "inline" markers -- nowadays we rely on the compiler to decide which routines are best inlined; Use the print_hex_dump() library routines; Remove some unnecessary assignments within conditionals and fix some close-brace indenting levels; Fix some column-80 violations. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
Greg Kroah-Hartman
Родитель
d74d4a69dc
Коммит
79a7d9ee1a
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@ -1,7 +1,7 @@
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/*
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* file_storage.c -- File-backed USB Storage Gadget, for USB development
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*
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* Copyright (C) 2003-2005 Alan Stern
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* Copyright (C) 2003-2007 Alan Stern
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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@ -218,7 +218,7 @@
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/* #define VERBOSE_DEBUG */
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#undef DUMP_MSGS
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/* #define DUMP_MSGS */
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#include <linux/blkdev.h>
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@ -249,7 +249,7 @@
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#define DRIVER_DESC "File-backed Storage Gadget"
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#define DRIVER_NAME "g_file_storage"
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#define DRIVER_VERSION "28 November 2005"
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#define DRIVER_VERSION "7 August 2007"
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static const char longname[] = DRIVER_DESC;
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static const char shortname[] = DRIVER_NAME;
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@ -275,12 +275,9 @@ MODULE_LICENSE("Dual BSD/GPL");
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/*-------------------------------------------------------------------------*/
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#define yprintk(l,level,fmt,args...) \
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dev_printk(level , &(l)->dev , fmt , ## args)
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#ifdef DEBUG
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#define LDBG(lun,fmt,args...) \
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yprintk(lun , KERN_DEBUG , fmt , ## args)
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dev_dbg(&(lun)->dev , fmt , ## args)
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#define MDBG(fmt,args...) \
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printk(KERN_DEBUG DRIVER_NAME ": " fmt , ## args)
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#else
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@ -300,11 +297,11 @@ MODULE_LICENSE("Dual BSD/GPL");
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#endif /* VERBOSE_DEBUG */
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#define LERROR(lun,fmt,args...) \
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yprintk(lun , KERN_ERR , fmt , ## args)
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dev_err(&(lun)->dev , fmt , ## args)
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#define LWARN(lun,fmt,args...) \
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yprintk(lun , KERN_WARNING , fmt , ## args)
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dev_warn(&(lun)->dev , fmt , ## args)
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#define LINFO(lun,fmt,args...) \
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yprintk(lun , KERN_INFO , fmt , ## args)
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dev_info(&(lun)->dev , fmt , ## args)
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#define MINFO(fmt,args...) \
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printk(KERN_INFO DRIVER_NAME ": " fmt , ## args)
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@ -558,7 +555,7 @@ struct lun {
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#define backing_file_is_open(curlun) ((curlun)->filp != NULL)
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static inline struct lun *dev_to_lun(struct device *dev)
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static struct lun *dev_to_lun(struct device *dev)
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{
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return container_of(dev, struct lun, dev);
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}
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@ -691,13 +688,13 @@ struct fsg_dev {
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typedef void (*fsg_routine_t)(struct fsg_dev *);
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static int inline exception_in_progress(struct fsg_dev *fsg)
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static int exception_in_progress(struct fsg_dev *fsg)
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{
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return (fsg->state > FSG_STATE_IDLE);
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}
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/* Make bulk-out requests be divisible by the maxpacket size */
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static void inline set_bulk_out_req_length(struct fsg_dev *fsg,
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static void set_bulk_out_req_length(struct fsg_dev *fsg,
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struct fsg_buffhd *bh, unsigned int length)
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{
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unsigned int rem;
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@ -723,50 +720,36 @@ static void close_all_backing_files(struct fsg_dev *fsg);
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static void dump_msg(struct fsg_dev *fsg, const char *label,
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const u8 *buf, unsigned int length)
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{
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unsigned int start, num, i;
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char line[52], *p;
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if (length >= 512)
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return;
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DBG(fsg, "%s, length %u:\n", label, length);
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start = 0;
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while (length > 0) {
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num = min(length, 16u);
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p = line;
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for (i = 0; i < num; ++i) {
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if (i == 8)
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*p++ = ' ';
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sprintf(p, " %02x", buf[i]);
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p += 3;
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}
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*p = 0;
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printk(KERN_DEBUG "%6x: %s\n", start, line);
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buf += num;
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start += num;
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length -= num;
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if (length < 512) {
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DBG(fsg, "%s, length %u:\n", label, length);
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print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
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16, 1, buf, length, 0);
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}
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}
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static void inline dump_cdb(struct fsg_dev *fsg)
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static void dump_cdb(struct fsg_dev *fsg)
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{}
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#else
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static void inline dump_msg(struct fsg_dev *fsg, const char *label,
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static void dump_msg(struct fsg_dev *fsg, const char *label,
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const u8 *buf, unsigned int length)
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{}
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static void inline dump_cdb(struct fsg_dev *fsg)
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{
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int i;
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char cmdbuf[3*MAX_COMMAND_SIZE + 1];
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#ifdef VERBOSE_DEBUG
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for (i = 0; i < fsg->cmnd_size; ++i)
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sprintf(cmdbuf + i*3, " %02x", fsg->cmnd[i]);
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VDBG(fsg, "SCSI CDB: %s\n", cmdbuf);
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static void dump_cdb(struct fsg_dev *fsg)
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{
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print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE,
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16, 1, fsg->cmnd, fsg->cmnd_size, 0);
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}
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#else
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static void dump_cdb(struct fsg_dev *fsg)
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{}
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#endif /* VERBOSE_DEBUG */
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#endif /* DUMP_MSGS */
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@ -789,24 +772,24 @@ static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep)
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/* Routines for unaligned data access */
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static u16 inline get_be16(u8 *buf)
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static u16 get_be16(u8 *buf)
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{
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return ((u16) buf[0] << 8) | ((u16) buf[1]);
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}
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static u32 inline get_be32(u8 *buf)
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static u32 get_be32(u8 *buf)
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{
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return ((u32) buf[0] << 24) | ((u32) buf[1] << 16) |
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((u32) buf[2] << 8) | ((u32) buf[3]);
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}
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static void inline put_be16(u8 *buf, u16 val)
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static void put_be16(u8 *buf, u16 val)
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{
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buf[0] = val >> 8;
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buf[1] = val;
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}
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static void inline put_be32(u8 *buf, u32 val)
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static void put_be32(u8 *buf, u32 val)
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{
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buf[0] = val >> 24;
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buf[1] = val >> 16;
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@ -992,7 +975,7 @@ static const struct usb_descriptor_header *hs_function[] = {
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#define HS_FUNCTION_PRE_EP_ENTRIES 2
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/* Maxpacket and other transfer characteristics vary by speed. */
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static inline struct usb_endpoint_descriptor *
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static struct usb_endpoint_descriptor *
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ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
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struct usb_endpoint_descriptor *hs)
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{
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@ -1616,7 +1599,8 @@ static int do_read(struct fsg_dev *fsg)
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/* Wait for the next buffer to become available */
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bh = fsg->next_buffhd_to_fill;
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while (bh->state != BUF_STATE_EMPTY) {
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if ((rc = sleep_thread(fsg)) != 0)
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rc = sleep_thread(fsg);
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if (rc)
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return rc;
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}
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@ -1855,7 +1839,8 @@ static int do_write(struct fsg_dev *fsg)
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}
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/* Wait for something to happen */
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if ((rc = sleep_thread(fsg)) != 0)
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rc = sleep_thread(fsg);
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if (rc)
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return rc;
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}
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@ -2339,7 +2324,8 @@ static int pad_with_zeros(struct fsg_dev *fsg)
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/* Wait for the next buffer to be free */
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while (bh->state != BUF_STATE_EMPTY) {
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if ((rc = sleep_thread(fsg)) != 0)
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rc = sleep_thread(fsg);
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if (rc)
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return rc;
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}
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@ -2399,7 +2385,8 @@ static int throw_away_data(struct fsg_dev *fsg)
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}
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/* Otherwise wait for something to happen */
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if ((rc = sleep_thread(fsg)) != 0)
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rc = sleep_thread(fsg);
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if (rc)
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return rc;
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}
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return 0;
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@ -2521,7 +2508,8 @@ static int send_status(struct fsg_dev *fsg)
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/* Wait for the next buffer to become available */
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bh = fsg->next_buffhd_to_fill;
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while (bh->state != BUF_STATE_EMPTY) {
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if ((rc = sleep_thread(fsg)) != 0)
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rc = sleep_thread(fsg);
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if (rc)
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return rc;
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}
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@ -2741,9 +2729,10 @@ static int do_scsi_command(struct fsg_dev *fsg)
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/* Wait for the next buffer to become available for data or status */
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bh = fsg->next_buffhd_to_drain = fsg->next_buffhd_to_fill;
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while (bh->state != BUF_STATE_EMPTY) {
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if ((rc = sleep_thread(fsg)) != 0)
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rc = sleep_thread(fsg);
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if (rc)
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return rc;
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}
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}
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fsg->phase_error = 0;
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fsg->short_packet_received = 0;
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@ -3015,9 +3004,10 @@ static int get_next_command(struct fsg_dev *fsg)
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/* Wait for the next buffer to become available */
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bh = fsg->next_buffhd_to_fill;
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while (bh->state != BUF_STATE_EMPTY) {
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if ((rc = sleep_thread(fsg)) != 0)
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rc = sleep_thread(fsg);
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if (rc)
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return rc;
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}
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}
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/* Queue a request to read a Bulk-only CBW */
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set_bulk_out_req_length(fsg, bh, USB_BULK_CB_WRAP_LEN);
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@ -3031,9 +3021,10 @@ static int get_next_command(struct fsg_dev *fsg)
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/* Wait for the CBW to arrive */
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while (bh->state != BUF_STATE_FULL) {
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if ((rc = sleep_thread(fsg)) != 0)
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rc = sleep_thread(fsg);
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if (rc)
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return rc;
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}
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}
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smp_rmb();
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rc = received_cbw(fsg, bh);
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bh->state = BUF_STATE_EMPTY;
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@ -3042,9 +3033,10 @@ static int get_next_command(struct fsg_dev *fsg)
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/* Wait for the next command to arrive */
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while (fsg->cbbuf_cmnd_size == 0) {
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if ((rc = sleep_thread(fsg)) != 0)
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rc = sleep_thread(fsg);
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if (rc)
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return rc;
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}
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}
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/* Is the previous status interrupt request still busy?
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* The host is allowed to skip reading the status,
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@ -3565,7 +3557,8 @@ static ssize_t show_ro(struct device *dev, struct device_attribute *attr, char *
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return sprintf(buf, "%d\n", curlun->ro);
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}
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static ssize_t show_file(struct device *dev, struct device_attribute *attr, char *buf)
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static ssize_t show_file(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct lun *curlun = dev_to_lun(dev);
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struct fsg_dev *fsg = dev_get_drvdata(dev);
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@ -3574,8 +3567,8 @@ static ssize_t show_file(struct device *dev, struct device_attribute *attr, char
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down_read(&fsg->filesem);
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if (backing_file_is_open(curlun)) { // Get the complete pathname
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p = d_path(curlun->filp->f_path.dentry, curlun->filp->f_path.mnt,
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buf, PAGE_SIZE - 1);
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p = d_path(curlun->filp->f_path.dentry,
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curlun->filp->f_path.mnt, buf, PAGE_SIZE - 1);
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if (IS_ERR(p))
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rc = PTR_ERR(p);
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else {
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@ -3593,7 +3586,8 @@ static ssize_t show_file(struct device *dev, struct device_attribute *attr, char
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}
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static ssize_t store_ro(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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static ssize_t store_ro(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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ssize_t rc = count;
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struct lun *curlun = dev_to_lun(dev);
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@ -3617,7 +3611,8 @@ static ssize_t store_ro(struct device *dev, struct device_attribute *attr, const
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return rc;
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}
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static ssize_t store_file(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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static ssize_t store_file(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct lun *curlun = dev_to_lun(dev);
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struct fsg_dev *fsg = dev_get_drvdata(dev);
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