46 lines
1.7 KiB
Diff
46 lines
1.7 KiB
Diff
From 5b575d6339e07e0992256b4a899bd886d2db2275 Mon Sep 17 00:00:00 2001
|
|
From: Josef Bacik <jbacik@fb.com>
|
|
Date: Mon, 31 Aug 2015 13:34:35 -0400
|
|
Subject: [PATCH] efinet: retransmit if our device is busy
|
|
|
|
When I fixed the txbuf handling I ripped out the retransmission code since it
|
|
was flooding our network when we had the buggy behavior. Turns out this was too
|
|
heavy handed as we can still have transient tx timeouts. So instead make sure
|
|
we retry our transmission once per timeout. This way we can deal with transient
|
|
transmission problems without flooding the box. This fixes an issue we were
|
|
seeing in production. Thanks,
|
|
|
|
Signed-off-by: Josef Bacik <jbacik@fb.com>
|
|
---
|
|
grub-core/net/drivers/efi/efinet.c | 10 ++++++++++
|
|
1 file changed, 10 insertions(+)
|
|
|
|
diff --git a/grub-core/net/drivers/efi/efinet.c b/grub-core/net/drivers/efi/efinet.c
|
|
index 5388f952ba9..3f112438a93 100644
|
|
--- a/grub-core/net/drivers/efi/efinet.c
|
|
+++ b/grub-core/net/drivers/efi/efinet.c
|
|
@@ -38,6 +38,7 @@ send_card_buffer (struct grub_net_card *dev,
|
|
grub_efi_simple_network_t *net = dev->efi_net;
|
|
grub_uint64_t limit_time = grub_get_time_ms () + 4000;
|
|
void *txbuf;
|
|
+ int retry = 0;
|
|
|
|
if (dev->txbusy)
|
|
while (1)
|
|
@@ -60,6 +61,15 @@ send_card_buffer (struct grub_net_card *dev,
|
|
dev->txbusy = 0;
|
|
break;
|
|
}
|
|
+ if (!retry)
|
|
+ {
|
|
+ st = efi_call_7 (net->transmit, net, 0, dev->last_pkt_size,
|
|
+ dev->txbuf, NULL, NULL, NULL);
|
|
+ if (st != GRUB_EFI_SUCCESS)
|
|
+ return grub_error (GRUB_ERR_IO,
|
|
+ N_("couldn't send network packet"));
|
|
+ retry = 1;
|
|
+ }
|
|
if (limit_time < grub_get_time_ms ())
|
|
return grub_error (GRUB_ERR_TIMEOUT,
|
|
N_("couldn't send network packet"));
|