From: Oliver Neukum <oneukum@xxxxxxx>
Rewrite for little overhead so that it can be used
in interrupt handlers for dynamic debugging
Signed-off-by: Oliver Neukum <oneukum@xxxxxxx>
---
drivers/usb/host/fusbh200-hcd.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/host/fusbh200-hcd.c b/drivers/usb/host/fusbh200-hcd.c
index 17374a3..70d2b01 100644
--- a/drivers/usb/host/fusbh200-hcd.c
+++ b/drivers/usb/host/fusbh200-hcd.c
@@ -202,10 +202,10 @@ dbg_itd (const char *label, struct fusbh200_hcd *fusbh200, struct fusbh200_itd *
itd->index[6], itd->index[7]);
}
-static int __maybe_unused
-dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
+static char
+*dbg_status_buf(char *buf, unsigned len, const char *label, u32 status)
{
- return scnprintf (buf, len,
+ scnprintf (buf, len,
"%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s",
label, label [0] ? " " : "", status,
(status & STS_ASS) ? " Async" : "",
@@ -219,6 +219,7 @@ dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
(status & STS_ERR) ? " ERR" : "",
(status & STS_INT) ? " INT" : ""
);
+ return buf;
}
static int __maybe_unused
@@ -289,8 +290,7 @@ dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
/* functions have the "wrong" filename when they're output... */
#define dbg_status(fusbh200, label, status) { \
char _buf [80]; \
- dbg_status_buf (_buf, sizeof _buf, label, status); \
- fusbh200_dbg (fusbh200, "%s\n", _buf); \
+ fusbh200_dbg (fusbh200, "%s\n", dbg_status_buf(_buf, sizeof _buf, label, status)); \
}
#define dbg_cmd(fusbh200, label, command) { \
@@ -706,7 +706,7 @@ static ssize_t fill_registers_buffer(struct debug_buffer *buf)
next += temp;
/* Operational Registers */
- temp = dbg_status_buf (scratch, sizeof scratch, label,
+ dbg_status_buf (scratch, sizeof scratch, label,
fusbh200_readl(fusbh200, &fusbh200->regs->status));
temp = scnprintf (next, size, fmt, temp, scratch);
size -= temp;
@@ -5326,10 +5326,8 @@ static irqreturn_t fusbh200_irq (struct usb_hcd *hcd)
cmd = fusbh200_readl(fusbh200, &fusbh200->regs->command);
bh = 0;
-#ifdef VERBOSE_DEBUG
/* unrequested/ignored: Frame List Rollover */
- dbg_status (fusbh200, "irq", status);
-#endif
+ dbg_status(fusbh200, "irq", status);
/* INT, ERR, and IAA interrupt rates can be throttled */
--
1.8.3.1
--
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