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usb: storage: Add usb_stor_dbg, reduce object size

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Reduce the size of the objects by consolidating
the duplicated USB_STORAGE into a single function.

Add function usb_stor_dbg to emit debugging messages.
Always validate the format and arguments.
Reduce the number of uses of CONFIG_USB_STORAGE_DEBUG.

Reduces size of objects ~7KB when CONFIG_USB_STORAGE_DEBUG
is set.

$ size drivers/usb/storage/built-in.o*
   text	   data	    bss	    dec	    hex	filename
 140133	  55296	  70312	 265741	  40e0d	drivers/usb/storage/built-in.o.new
 147494	  55248	  70296	 273038	  42a8e	drivers/usb/storage/built-in.o.old

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Joe Perches 2013-04-16 22:44:07 -07:00 committed by Greg Kroah-Hartman
parent 61ac6ac8d6
commit 75b9130e8a
3 changed files with 34 additions and 12 deletions
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20
drivers/usb/storage/debug.c
View File

@ -150,7 +150,7 @@ void usb_stor_show_command(struct scsi_cmnd *srb)
default: what = "(unknown command)"; break;
}
US_DEBUGP("Command %s (%d bytes)\n", what, srb->cmd_len);
US_DEBUGP("");
US_DEBUGP("bytes: ");
for (i = 0; i < srb->cmd_len && i < 16; i++)
US_DEBUGPX(" %02x", srb->cmnd[i]);
US_DEBUGPX("\n");
@ -175,3 +175,21 @@ void usb_stor_show_sense(
US_DEBUGPX(what, ascq);
US_DEBUGPX("\n");
}
int usb_stor_dbg(const char *fmt, ...)
{
struct va_format vaf;
va_list args;
int r;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
r = printk(KERN_DEBUG USB_STORAGE "%pV", &vaf);
va_end(args);
return r;
}

14
drivers/usb/storage/debug.h
View File

@ -50,12 +50,16 @@
void usb_stor_show_command(struct scsi_cmnd *srb);
void usb_stor_show_sense( unsigned char key,
unsigned char asc, unsigned char ascq );
#define US_DEBUGP(x...) printk( KERN_DEBUG USB_STORAGE x )
#define US_DEBUGPX(x...) printk( x )
#define US_DEBUG(x) x
__printf(1, 2) int usb_stor_dbg(const char *fmt, ...);
#define US_DEBUGP(fmt, ...) usb_stor_dbg(fmt, ##__VA_ARGS__)
#define US_DEBUGPX(fmt, ...) printk(fmt, ##__VA_ARGS__)
#define US_DEBUG(x) x
#else
#define US_DEBUGP(x...)
#define US_DEBUGPX(x...)
#define US_DEBUGP(fmt, ...) \
do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
#define US_DEBUGPX(fmt, ...) \
do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
#define US_DEBUG(x)
#endif

12
drivers/usb/storage/isd200.c
View File

@ -926,10 +926,6 @@ static int isd200_try_enum(struct us_data *us, unsigned char master_slave,
/* loop until we detect !BSY or timeout */
while(1) {
#ifdef CONFIG_USB_STORAGE_DEBUG
char* mstr = master_slave == ATA_ADDRESS_DEVHEAD_STD ?
"Master" : "Slave";
#endif
status = isd200_action( us, ACTION_ENUM, NULL, master_slave );
if ( status != ISD200_GOOD )
@ -942,9 +938,13 @@ static int isd200_try_enum(struct us_data *us, unsigned char master_slave,
if (!detect) {
if (regs[ATA_REG_STATUS_OFFSET] & ATA_BUSY) {
US_DEBUGP(" %s status is still BSY, try again...\n",mstr);
US_DEBUGP(" %s status is still BSY, try again...\n",
master_slave == ATA_ADDRESS_DEVHEAD_STD ?
"Master" : "Slave");
} else {
US_DEBUGP(" %s status !BSY, continue with next operation\n",mstr);
US_DEBUGP(" %s status !BSY, continue with next operation\n",
master_slave == ATA_ADDRESS_DEVHEAD_STD ?
"Master" : "Slave");
break;
}
}