Fix ixl debug sysctls panic

Remove the use of sbuf_data on drained sbufs from the debug sysctls:
* ixl_sysctl_hw_res_alloc
* ixl_sysctl_switch_config

This prevents a kernel panic when accessing these values under a kernel
compiled with INVARIANTS.

Sponsored by:	Multiplay

1 files changed, 2 insertions, 19 deletions

diff --git a/sys/dev/ixl/if_ixl.c b/sys/dev/ixl/if_ixl.c
index 017ac7b..0428140 100644
--- a/sys/dev/ixl/if_ixl.c
+++ b/sys/dev/ixl/if_ixl.c
@@ -5119,17 +5119,9 @@ ixl_sysctl_hw_res_alloc(SYSCTL_HANDLER_ARGS)
 	}
 
 	error = sbuf_finish(buf);
-	if (error) {
-		device_printf(dev, "Error finishing sbuf: %d\n", error);
-		sbuf_delete(buf);
-		return error;
-	}
-
-	error = sysctl_handle_string(oidp, sbuf_data(buf), sbuf_len(buf), req);
-	if (error)
-		device_printf(dev, "sysctl error: %d\n", error);
 	sbuf_delete(buf);
-	return error;
+
+	return (error);
 }
 
 /*
@@ -5236,15 +5228,6 @@ ixl_sysctl_switch_config(SYSCTL_HANDLER_ARGS)
 	sbuf_delete(nmbuf);
 
 	error = sbuf_finish(buf);
-	if (error) {
-		device_printf(dev, "Error finishing sbuf: %d\n", error);
-		sbuf_delete(buf);
-		return error;
-	}
-
-	error = sysctl_handle_string(oidp, sbuf_data(buf), sbuf_len(buf), req);
-	if (error)
-		device_printf(dev, "sysctl error: %d\n", error);
 	sbuf_delete(buf);
 
 	return (error);