tree 1797b5b7fbca276e4c131b1a5c48b102cdac5f8a
parent c4cb99185b4cc96c0a1c70104dc21ae14d7e7f28
author Brian King <brking@linux.vnet.ibm.com> 1510938348 -0600
committer Jeff Kirsher <jeffrey.t.kirsher@intel.com> 1511336919 -0800

fm10k: 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 fm10k 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: stable <stable@vger.kernel.org>
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Acked-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>