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