target/linux/layerscape/patches-5.4/701-net-0161-staging-fsl-dpaa2-mac-Request-atomic-context-MC-port.patch

   1 From 001bad547937cdd667adee45b5c7ebe78a1de1d0 Mon Sep 17 00:00:00 2001
   2 From: Ioana Radulescu <ruxandra.radulescu@nxp.com>
   3 Date: Fri, 22 Sep 2017 12:20:02 +0300
   4 Subject: [PATCH] staging: fsl-dpaa2/mac: Request atomic context MC portals
   5
   6 The MAC driver may need to issue MC commands while in atomic
   7 context (e.g. dpaa2_mac_get_stats can be called from a critical
   8 section), so we need to use MC portals that don't sleep while
   9 waiting for a command response to arrive.
  10
  11 Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
  12 ---
  13  drivers/staging/fsl-dpaa2/mac/mac.c | 4 +++-
  14  1 file changed, 3 insertions(+), 1 deletion(-)
  15
  16 --- a/drivers/staging/fsl-dpaa2/mac/mac.c
  17 +++ b/drivers/staging/fsl-dpaa2/mac/mac.c
  18 @@ -490,7 +490,9 @@ static int dpaa2_mac_probe(struct fsl_mc
  19
  20         dev_set_drvdata(dev, priv);
  21
  22 -       err = fsl_mc_portal_allocate(mc_dev, 0, &mc_dev->mc_io);
  23 +       /* We may need to issue MC commands while in atomic context */
  24 +       err = fsl_mc_portal_allocate(mc_dev, FSL_MC_IO_ATOMIC_CONTEXT_PORTAL,
  25 +                                    &mc_dev->mc_io);
  26         if (err || !mc_dev->mc_io) {
  27                 dev_err(dev, "fsl_mc_portal_allocate error: %d\n", err);
  28                 err = -ENODEV;