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bnxt: HW_LRO Rx Pkt with > 32 fragments caused Crash (iflib)

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Broadcom NIC with HW_LRO setting max_agg_segs >= 6 can generate Rx pkt with
64 (2^6) fragments, modify IFLIB_MAX_RX_SEGS to 64 to avoid memory
corruption / Crash.

Submitted by:	Bhargava Chenna Marreddy <bhargava.marreddy@broadcom.com>
Reviewed by:	shurd, sbruno
Approved by:	sbruno (mentor)
Sponsored by:	Broadcom Limited
Differential Revision:	https://reviews.freebsd.org/D12774
This commit is contained in:
Stephen Hurd 2017-10-30 21:20:33 +00:00
parent 2d873474b2
commit 09b57b7f40
1 changed files with 2 additions and 1 deletions
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3
sys/net/iflib.c
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@ -288,7 +288,8 @@ typedef struct iflib_sw_tx_desc_array {
/* magic number that should be high enough for any hardware */
#define IFLIB_MAX_TX_SEGS 128
#define IFLIB_MAX_RX_SEGS 32
/* bnxt supports 64 with hardware LRO enabled */
#define IFLIB_MAX_RX_SEGS 64
#define IFLIB_RX_COPY_THRESH 128
#define IFLIB_MAX_RX_REFRESH 32
/* The minimum descriptors per second before we start coalescing */