Re: [PATCH] mcs7830: Fix link state detection
flat view
From: Andreas Mohr <hidden>
Date: 2012-10-11 18:47:08
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Hi, On Thu, Oct 11, 2012 at 12:33:28PM +0200, Ondrej Zary wrote:
quoted hunk ↗ jump to hunk
u8 *buf = urb->transfer_buffer; bool link; + struct mcs7830_data *data = mcs7830_get_data(dev); if (urb->actual_length < 16) return;
Alternatively could do *data = NULL; and then actually assign after the conditional. But since the conditional most likely is coldpath I think your chosen implementation is best.
link = !(buf[1] & 0x20);
if (netif_carrier_ok(dev->net) != link) {I usually like to introduce helper bools to clearly express the intention behind things (source code should be readable like a book, yet it all too often is everything but...). I.e. bool link_state_change_detected = (netif_carrier_ok......); if (bool) Might be an idea here, too. The logic behind your counter implementation seems solid to me (short explanatory comment "track link state several times, to guard against transient erroneous link state of (some versions of?) this chip" might have been useful though). Thank you very much for your patch! Andreas Mohr