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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Paulo Flabiano Smorigo <pfsmorigo@br.ibm.com>
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Date: Tue, 21 Jan 2014 11:03:51 -0200
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Subject: [PATCH] increase network try interval gradually
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* grub-core/net/arp.c (grub_net_arp_send_request): Increase network try
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interval gradually.
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* grub-core/net/icmp6.c (grub_net_icmp6_send_request): Likewise.
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* grub-core/net/net.c (grub_net_fs_read_real): Likewise.
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* grub-core/net/tftp.c (tftp_open): Likewise.
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* include/grub/net.h (GRUB_NET_INTERVAL_ADDITION): New define.
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---
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 grub-core/net/arp.c   | 3 ++-
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 grub-core/net/icmp6.c | 3 ++-
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 grub-core/net/net.c   | 5 +++--
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 grub-core/net/tftp.c  | 3 ++-
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 include/grub/net.h    | 1 +
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 ChangeLog             | 9 +++++++++
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 6 files changed, 19 insertions(+), 5 deletions(-)
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diff --git a/grub-core/net/arp.c b/grub-core/net/arp.c
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index e92c7e7daec..d62d0cc1e01 100644
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--- a/grub-core/net/arp.c
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+++ b/grub-core/net/arp.c
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@@ -110,7 +110,8 @@ grub_net_arp_send_request (struct grub_net_network_level_interface *inf,
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 	return GRUB_ERR_NONE;
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       pending_req = proto_addr->ipv4;
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       have_pending = 0;
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-      grub_net_poll_cards (GRUB_NET_INTERVAL, &have_pending);
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+      grub_net_poll_cards (GRUB_NET_INTERVAL + (i * GRUB_NET_INTERVAL_ADDITION),
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+                           &have_pending);
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       if (grub_net_link_layer_resolve_check (inf, proto_addr))
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 	return GRUB_ERR_NONE;
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       nb.data = nbd;
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diff --git a/grub-core/net/icmp6.c b/grub-core/net/icmp6.c
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index 2741e6f11fb..bbc902014fe 100644
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--- a/grub-core/net/icmp6.c
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+++ b/grub-core/net/icmp6.c
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@@ -518,7 +518,8 @@ grub_net_icmp6_send_request (struct grub_net_network_level_interface *inf,
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     {
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       if (grub_net_link_layer_resolve_check (inf, proto_addr))
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 	break;
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-      grub_net_poll_cards (GRUB_NET_INTERVAL, 0);
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+      grub_net_poll_cards (GRUB_NET_INTERVAL + (i * GRUB_NET_INTERVAL_ADDITION),
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+                           0);
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       if (grub_net_link_layer_resolve_check (inf, proto_addr))
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 	break;
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       nb->data = nbd;
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diff --git a/grub-core/net/net.c b/grub-core/net/net.c
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index 56355f3c98c..1521d8d2c87 100644
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--- a/grub-core/net/net.c
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+++ b/grub-core/net/net.c
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@@ -1558,8 +1558,9 @@ grub_net_fs_read_real (grub_file_t file, char *buf, grub_size_t len)
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       if (!net->eof)
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 	{
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 	  try++;
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-	  grub_net_poll_cards (GRUB_NET_INTERVAL, &net->stall);
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-	}
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+	  grub_net_poll_cards (GRUB_NET_INTERVAL +
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+                               (try * GRUB_NET_INTERVAL_ADDITION), &net->stall);
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+        }
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       else
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 	return total;
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     }
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diff --git a/grub-core/net/tftp.c b/grub-core/net/tftp.c
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index 9c489f1fc94..51736142764 100644
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--- a/grub-core/net/tftp.c
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+++ b/grub-core/net/tftp.c
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@@ -398,7 +398,8 @@ tftp_open (struct grub_file *file, const char *filename)
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 	  destroy_pq (data);
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 	  return err;
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 	}
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-      grub_net_poll_cards (GRUB_NET_INTERVAL, &data->have_oack);
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+      grub_net_poll_cards (GRUB_NET_INTERVAL + (i * GRUB_NET_INTERVAL_ADDITION),
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+                           &data->have_oack);
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       if (data->have_oack)
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 	break;
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     }
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diff --git a/include/grub/net.h b/include/grub/net.h
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index de6259ee1a0..0e0a605c5a6 100644
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--- a/include/grub/net.h
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+++ b/include/grub/net.h
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@@ -532,5 +532,6 @@ extern char *grub_net_default_server;
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 #define GRUB_NET_TRIES 40
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 #define GRUB_NET_INTERVAL 400
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+#define GRUB_NET_INTERVAL_ADDITION 20
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 #endif /* ! GRUB_NET_HEADER */
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diff --git a/ChangeLog b/ChangeLog
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index f69d8c7e042..f5618a6eb70 100644
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--- a/ChangeLog
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+++ b/ChangeLog
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@@ -1,3 +1,12 @@
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+2014-01-21  Paulo Flabiano Smorigo  <pfsmorigo@br.ibm.com>
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+
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+	* grub-core/net/arp.c (grub_net_arp_send_request): Increase network try
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+	interval gradually.
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+	* grub-core/net/icmp6.c (grub_net_icmp6_send_request): Likewise.
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+	* grub-core/net/net.c (grub_net_fs_read_real): Likewise.
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+	* grub-core/net/tftp.c (tftp_open): Likewise.
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+	* include/grub/net.h (GRUB_NET_INTERVAL_ADDITION): New define.
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+
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 2014-01-21  Paulo Flabiano Smorigo  <pfsmorigo@br.ibm.com>
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 	* grub-core/net/net.c (receive_packets): Change stop condition to avoid