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USB: dbgp: insert cr prior to nl as needed

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The rs232 drivers send a carriage return prior to a new line in the
early printk code.

The usb debug driver should do the same because you want to be able to
use the same terminal programs and tools for analysis of early printk
data.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jason Wessel 2009-08-20 15:39:49 -05:00 committed by Greg Kroah-Hartman
parent df6c516900
commit 87a5d15154
1 changed files with 16 additions and 6 deletions
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22
drivers/usb/early/ehci-dbgp.c
View file

@ -700,17 +700,27 @@ int __init early_dbgp_init(char *s)
static void early_dbgp_write(struct console *con, const char *str, u32 n)
{
int chunk, ret;
char buf[DBGP_MAX_PACKET];
int use_cr = 0;
if (!ehci_debug)
return;
while (n > 0) {
chunk = n;
if (chunk > DBGP_MAX_PACKET)
chunk = DBGP_MAX_PACKET;
for (chunk = 0; chunk < DBGP_MAX_PACKET && n > 0;
str++, chunk++, n--) {
if (!use_cr && *str == '\n') {
use_cr = 1;
buf[chunk] = '\r';
str--;
n++;
continue;
}
if (use_cr)
use_cr = 0;
buf[chunk] = *str;
}
ret = dbgp_bulk_write(USB_DEBUG_DEVNUM,
dbgp_endpoint_out, str, chunk);
str += chunk;
n -= chunk;
dbgp_endpoint_out, buf, chunk);
}
}