sfc: add module parameter to enable MCDI logging on new functions

As many issues are encountered at probe time, where MCDI logging can't be
 enabled through the sysfs node, this change adds a module parameter
 'mcdi_logging_default', which defaults to false.  When set to true, newly-
 probed functions will have MCDI logging enabled.  The setting can
 subsequently be changed as normal through the sysfs node.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/sfc/mcdi.c b/drivers/net/ethernet/sfc/mcdi.c
index dde7f901e16c9a1d75f36839fe6e341025e49c46..81640f8bb811b099f6b2afb55cbb55f004c1096e 100644 (file)
--- a/drivers/net/ethernet/sfc/mcdi.c
+++ b/drivers/net/ethernet/sfc/mcdi.c
@@ -8,6 +8,7 @@
  */
 
 #include <linux/delay.h>
+#include <linux/moduleparam.h>
 #include <asm/cmpxchg.h>
 #include "net_driver.h"
 #include "nic.h"
@@ -54,6 +55,13 @@ static int efx_mcdi_drv_attach(struct efx_nic *efx, bool driver_operating,
 static bool efx_mcdi_poll_once(struct efx_nic *efx);
 static void efx_mcdi_abandon(struct efx_nic *efx);
 
+#ifdef CONFIG_SFC_MCDI_LOGGING
+static bool mcdi_logging_default;
+module_param(mcdi_logging_default, bool, 0644);
+MODULE_PARM_DESC(mcdi_logging_default,
+                "Enable MCDI logging on newly-probed functions");
+#endif
+
 int efx_mcdi_init(struct efx_nic *efx)
 {
        struct efx_mcdi_iface *mcdi;
@@ -71,6 +79,7 @@ int efx_mcdi_init(struct efx_nic *efx)
        mcdi->logging_buffer = (char *)__get_free_page(GFP_KERNEL);
        if (!mcdi->logging_buffer)
                goto fail1;
+       mcdi->logging_enabled = mcdi_logging_default;
 #endif
        init_waitqueue_head(&mcdi->wq);
        spin_lock_init(&mcdi->iface_lock);