AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

igb: fix assignment on big endian machines

Browse Source 
[ Upstream commit b514958dd1a3bd57638b0e63b8e5152b1960e6aa ]

The igb driver was trying hard to be sparse correct, but somehow
ended up converting a variable into little endian order and then
tries to OR something with it.

A much plainer way of doing things is to leave all variables and
OR operations in CPU (non-endian) mode, and then convert to
little endian only once, which is what this change does.

This probably fixes a bug that might have been seen only on
big endian systems.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jesse Brandeburg 2021-03-25 17:38:29 -07:00 committed by Greg Kroah-Hartman
parent 66d593aa3a
commit 95f8ce9f18
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/ethernet/intel/igb/igb_main.c
View File

@ -6289,12 +6289,12 @@ int igb_xmit_xdp_ring(struct igb_adapter *adapter,
cmd_type |= len | IGB_TXD_DCMD;
tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
olinfo_status = cpu_to_le32(len << E1000_ADVTXD_PAYLEN_SHIFT);
olinfo_status = len << E1000_ADVTXD_PAYLEN_SHIFT;
/* 82575 requires a unique index per ring */
if (test_bit(IGB_RING_FLAG_TX_CTX_IDX, &tx_ring->flags))
olinfo_status |= tx_ring->reg_idx << 4;
tx_desc->read.olinfo_status = olinfo_status;
tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
netdev_tx_sent_queue(txring_txq(tx_ring), tx_buffer->bytecount);