sfc: Allow changing the DMA ring sizes dynamically via ethtool
This requires some reorganisation of channel setup and teardown to
ensure that we can always roll-back a failed change.
Based on work by Steve Hodgson <shodgson@solarflare.com>
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/nic.c b/drivers/net/sfc/nic.c
index 0deb5c3..6c5c0ce 100644
--- a/drivers/net/sfc/nic.c
+++ b/drivers/net/sfc/nic.c
@@ -1478,7 +1478,7 @@
*/
static irqreturn_t efx_msi_interrupt(int irq, void *dev_id)
{
- struct efx_channel *channel = dev_id;
+ struct efx_channel *channel = *(struct efx_channel **)dev_id;
struct efx_nic *efx = channel->efx;
efx_oword_t *int_ker = efx->irq_status.addr;
int syserr;
@@ -1553,7 +1553,8 @@
efx_for_each_channel(channel, efx) {
rc = request_irq(channel->irq, efx_msi_interrupt,
IRQF_PROBE_SHARED, /* Not shared */
- channel->name, channel);
+ efx->channel_name[channel->channel],
+ &efx->channel[channel->channel]);
if (rc) {
netif_err(efx, drv, efx->net_dev,
"failed to hook IRQ %d\n", channel->irq);
@@ -1565,7 +1566,7 @@
fail2:
efx_for_each_channel(channel, efx)
- free_irq(channel->irq, channel);
+ free_irq(channel->irq, &efx->channel[channel->channel]);
fail1:
return rc;
}
@@ -1578,7 +1579,7 @@
/* Disable MSI/MSI-X interrupts */
efx_for_each_channel(channel, efx) {
if (channel->irq)
- free_irq(channel->irq, channel);
+ free_irq(channel->irq, &efx->channel[channel->channel]);
}
/* ACK legacy interrupt */