The number of rx queues is determined by the rss_cpus parameter
or the cpu topology. If that is higher than EFX_MAX_RX_QUEUES the
driver can corrupt state.
Fixes:
8ceee660aacb ("New driver "sfc" for Solarstorm SFC4000 controller.")
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
free_cpumask_var(thread_mask);
}
+ if (count > EFX_MAX_RX_QUEUES) {
+ netif_cond_dbg(efx, probe, efx->net_dev, !rss_cpus, warn,
+ "Reducing number of rx queues from %u to %u.\n",
+ count, EFX_MAX_RX_QUEUES);
+ count = EFX_MAX_RX_QUEUES;
+ }
+
/* If RSS is requested for the PF *and* VFs then we can't write RSS
* table entries that are inaccessible to VFs
*/
free_cpumask_var(thread_mask);
}
+ if (count > EF4_MAX_RX_QUEUES) {
+ netif_cond_dbg(efx, probe, efx->net_dev, !rss_cpus, warn,
+ "Reducing number of rx queues from %u to %u.\n",
+ count, EF4_MAX_RX_QUEUES);
+ count = EF4_MAX_RX_QUEUES;
+ }
+
return count;
}