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