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SubjectRe: [SOLVED] Serial buffer corruption [was Re: FTDI usb-serial possible bug]
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On Sat, 2007-05-05 at 18:58 +0200, Antonino Ingargiola wrote:
> This patch does not solve the problem with the cdc_acd driver. I still
> need to flush two times to really flush the input. And the "secondary
> buffer" still seems 26 bytes (as before).

I missed a bit, try this.

--- a/drivers/usb/class/cdc-acm.c 2007-04-25 22:08:32.000000000 -0500
+++ b/drivers/usb/class/cdc-acm.c 2007-05-05 12:03:19.000000000 -0500
@@ -335,8 +335,6 @@ static void acm_rx_tasklet(unsigned long
spin_lock_irqsave(&acm->throttle_lock, flags);
throttled = acm->throttle;
spin_unlock_irqrestore(&acm->throttle_lock, flags);
- if (throttled)
- return;

next_buffer:
spin_lock_irqsave(&acm->read_lock, flags);
@@ -355,18 +353,9 @@ next_buffer:
spin_lock_irqsave(&acm->throttle_lock, flags);
throttled = acm->throttle;
spin_unlock_irqrestore(&acm->throttle_lock, flags);
- if (!throttled)
- tty_insert_flip_string(tty, buf->base, buf->size);
+ tty_insert_flip_string(tty, buf->base, buf->size);
tty_flip_buffer_push(tty);

- if (throttled) {
- dbg("Throttling noticed");
- spin_lock_irqsave(&acm->read_lock, flags);
- list_add(&buf->list, &acm->filled_read_bufs);
- spin_unlock_irqrestore(&acm->read_lock, flags);
- return;
- }
-
spin_lock_irqsave(&acm->read_lock, flags);
list_add(&buf->list, &acm->spare_read_bufs);
spin_unlock_irqrestore(&acm->read_lock, flags);

-
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