From: Intel-wired-lan [mailto:intel-wired-lan-bounces@osuosl.org] On Behalf Of Brian King Sent: Friday, November 17, 2017 9:06 AM Cc: muvic@linux.vnet.ibm.com; stable@vger.kernel.org; intel-wired- lan@lists.osuosl.org; brking@pobox.com Subject: [Intel-wired-lan] [PATCH v2 5/7] igb: Use smp_rmb rather than read_barrier_depends
The original issue being fixed in this patch was seen with the ixgbe driver, but the same issue exists with igb as well, as the code is very similar. read_barrier_depends is not sufficient to ensure loads following it are not speculatively loaded out of order by the CPU, which can result in stale data being loaded, causing potential system crashes.
Cc: stablestable@vger.kernel.org Signed-off-by: Brian King brking@linux.vnet.ibm.com
drivers/net/ethernet/intel/igb/igb_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
Tested-by: Aaron Brown aaron.f.brown@intel.com