iob: limit the iob bufsize is sufficient to fill all L2/L3/L4 headers

rndis header length is 36, L2 header is 14, IPv6 header is 40, tcp header is 56 when sack option count is 4(default max_ofosegs is 4). so the iob bufsize should greater than we need. Signed-off-by: zhanghongyu <[email protected]>
SPRESENSE · Sep 20, 2023 · 13f5912 · 13f5912
1 parent 55d5006
commit 13f5912
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/mm/iob/Kconfig b/mm/iob/Kconfig
@@ -26,6 +26,8 @@ config IOB_NBUFFERS
 
 config IOB_BUFSIZE
 	int "Payload size of one I/O buffer"
+	range 196 65535 if NET_TCP_SELECTIVE_ACK && NET_IPv6 && RNDIS
+	range 128 65535 if NET_TCP_SELECTIVE_ACK && (NET_IPv4 || NET_IPv6)
 	default 196
 	---help---
 		Each packet is represented by a series of small I/O buffers in a