soc: fsl: dpio: keep a per dpio device MC portal

At the moment, the dpio-driver allocates an MC portal at probe time and
frees it right after usage. The same thing happens on the remove path.
This behavior could lead to scenarios where an MC portal is available
for use at probing but not longer free on the remove path which could
lead to unproper unbind of resources.

Change the driver's behavior in such a way that an MC portal is
allocated at probe and kept until the DPIO device is removed. This will
ensure that at any time after a DPIO device was successfully probed, all
its dependencies will be met.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>

diff --git a/drivers/soc/fsl/dpio/dpio-driver.c b/drivers/soc/fsl/dpio/dpio-driver.c
index 38ee9dba1c96f6fd28a8438e6adc4ad5ef9eab29..5286723d4a1471ef96a2eef22780c5a9e54d935d 100644 (file)
--- a/drivers/soc/fsl/dpio/dpio-driver.c
+++ b/drivers/soc/fsl/dpio/dpio-driver.c
@@ -187,7 +187,6 @@ static int dpaa2_dpio_probe(struct fsl_mc_device *dpio_dev)
        dev_dbg(dev, "   receives_notifications = %d\n",
                desc.receives_notifications);
        dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle);
-       fsl_mc_portal_free(dpio_dev->mc_io);
 
        return 0;
 
@@ -229,12 +228,6 @@ static int dpaa2_dpio_remove(struct fsl_mc_device *dpio_dev)
        cpu = dpaa2_io_get_cpu(priv->io);
        cpumask_set_cpu(cpu, cpus_unused_mask);
 
-       err = fsl_mc_portal_allocate(dpio_dev, 0, &dpio_dev->mc_io);
-       if (err) {
-               dev_err(dev, "MC portal allocation failed\n");
-               goto err_mcportal;
-       }
-
        err = dpio_open(dpio_dev->mc_io, 0, dpio_dev->obj_desc.id,
                        &dpio_dev->mc_handle);
        if (err) {
@@ -252,7 +245,7 @@ static int dpaa2_dpio_remove(struct fsl_mc_device *dpio_dev)
 
 err_open:
        fsl_mc_portal_free(dpio_dev->mc_io);
-err_mcportal:
+
        return err;
 }