Commit e2de678c authored by Edward Cree's avatar Edward Cree Committed by Sasha Levin

sfc: on MC reset, clear PIO buffer linkage in TXQs

[ Upstream commit c0795bf6 ]

Otherwise, if we fail to allocate new PIO buffers, our TXQs will try to
use the old ones, which aren't there any more.

Fixes: 183233be "sfc: Allocate and link PIO buffers; map them with write-combining"
Signed-off-by: default avatarEdward Cree <ecree@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
parent 27b56c61
......@@ -452,6 +452,17 @@ static int efx_ef10_link_piobufs(struct efx_nic *efx)
return rc;
}
static void efx_ef10_forget_old_piobufs(struct efx_nic *efx)
{
struct efx_channel *channel;
struct efx_tx_queue *tx_queue;
/* All our existing PIO buffers went away */
efx_for_each_channel(channel, efx)
efx_for_each_channel_tx_queue(tx_queue, channel)
tx_queue->piobuf = NULL;
}
#else /* !EFX_USE_PIO */
static int efx_ef10_alloc_piobufs(struct efx_nic *efx, unsigned int n)
......@@ -468,6 +479,10 @@ static void efx_ef10_free_piobufs(struct efx_nic *efx)
{
}
static void efx_ef10_forget_old_piobufs(struct efx_nic *efx)
{
}
#endif /* EFX_USE_PIO */
static void efx_ef10_remove(struct efx_nic *efx)
......@@ -699,6 +714,7 @@ static void efx_ef10_reset_mc_allocations(struct efx_nic *efx)
nic_data->must_realloc_vis = true;
nic_data->must_restore_filters = true;
nic_data->must_restore_piobufs = true;
efx_ef10_forget_old_piobufs(efx);
nic_data->rx_rss_context = EFX_EF10_RSS_CONTEXT_INVALID;
}
......
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