Question about be2net error field, rx_drops_no_pbuf

[Marcelo Leitner <mleitner@xxxxxxxxxx>]

Hi,

What does 'rx_drops_no_pbuf' mean at be2net driver? I can see it is a 
hardware counter for some type of error, which I would like to know 
about. What causes it?

All documentation I could find about it is a comment referring firmware 
specification:

struct be_rxf_stats_v0 {
    struct be_port_rxf_stats_v0 port[2];
    u32 rx_drops_no_pbuf;   /* dword 132*/
    ...
}

struct be_rxf_stats_v1 {
    struct be_port_rxf_stats_v1 port[4];
    u32 rsvd0[2];
    u32 rx_drops_no_pbuf;
    ...
}

That, plus this:

be_get_stats64()
{
    ...
    /* receiver fifo overrun */
    /* drops_no_pbuf is no per i/f, it's per BE card */
    stats->rx_fifo_errors = drvs->rxpp_fifo_overflow_drop +
                drvs->rx_input_fifo_overflow_drop +
                drvs->rx_drops_no_pbuf;
    return stats;
}

Thanks,
Marcelo.
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