diff options
| -rw-r--r-- | drivers/bus/fsl-mc/dprc-driver.c | 62 | ||||
| -rw-r--r-- | include/linux/fsl/mc.h | 2 |
2 files changed, 49 insertions, 15 deletions
diff --git a/drivers/bus/fsl-mc/dprc-driver.c b/drivers/bus/fsl-mc/dprc-driver.c index dde8fe965e30..516119c8121a 100644 --- a/drivers/bus/fsl-mc/dprc-driver.c +++ b/drivers/bus/fsl-mc/dprc-driver.c @@ -728,33 +728,26 @@ static void dprc_teardown_irq(struct fsl_mc_device *mc_dev) } /** - * dprc_remove - callback invoked when a DPRC is being unbound from this driver + * dprc_cleanup - function that cleanups a DPRC * * @mc_dev: Pointer to fsl-mc device representing the DPRC * - * It removes the DPRC's child objects from Linux (not from the MC) and - * closes the DPRC device in the MC. - * It tears down the interrupts that were configured for the DPRC device. + * It closes the DPRC device in the MC. * It destroys the interrupt pool associated with this MC bus. */ -static int dprc_remove(struct fsl_mc_device *mc_dev) + +int dprc_cleanup(struct fsl_mc_device *mc_dev) { int error; struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev); - if (!is_fsl_mc_bus_dprc(mc_dev)) - return -EINVAL; - if (!mc_dev->mc_io) - return -EINVAL; - if (!mc_bus->irq_resources) + /* this function should be called only for DPRCs, it + * is an error to call it for regular objects + */ + if (!is_fsl_mc_bus_dprc(mc_dev)) return -EINVAL; - if (dev_get_msi_domain(&mc_dev->dev)) - dprc_teardown_irq(mc_dev); - - device_for_each_child(&mc_dev->dev, NULL, __fsl_mc_device_remove); - if (dev_get_msi_domain(&mc_dev->dev)) { fsl_mc_cleanup_irq_pool(mc_bus); dev_set_msi_domain(&mc_dev->dev, NULL); @@ -762,6 +755,14 @@ static int dprc_remove(struct fsl_mc_device *mc_dev) fsl_mc_cleanup_all_resource_pools(mc_dev); + /* if this step fails we cannot go further with cleanup as there is no way of + * communicating with the firmware + */ + if (!mc_dev->mc_io) { + dev_err(&mc_dev->dev, "mc_io is NULL, tear down cannot be performed in firmware\n"); + return -EINVAL; + } + error = dprc_close(mc_dev->mc_io, 0, mc_dev->mc_handle); if (error < 0) dev_err(&mc_dev->dev, "dprc_close() failed: %d\n", error); @@ -771,6 +772,37 @@ static int dprc_remove(struct fsl_mc_device *mc_dev) mc_dev->mc_io = NULL; } + return 0; +} +EXPORT_SYMBOL_GPL(dprc_cleanup); + +/** + * dprc_remove - callback invoked when a DPRC is being unbound from this driver + * + * @mc_dev: Pointer to fsl-mc device representing the DPRC + * + * It removes the DPRC's child objects from Linux (not from the MC) and + * closes the DPRC device in the MC. + * It tears down the interrupts that were configured for the DPRC device. + * It destroys the interrupt pool associated with this MC bus. + */ +static int dprc_remove(struct fsl_mc_device *mc_dev) +{ + struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev); + + if (!is_fsl_mc_bus_dprc(mc_dev)) + return -EINVAL; + + if (!mc_bus->irq_resources) + return -EINVAL; + + if (dev_get_msi_domain(&mc_dev->dev)) + dprc_teardown_irq(mc_dev); + + device_for_each_child(&mc_dev->dev, NULL, __fsl_mc_device_remove); + + dprc_cleanup(mc_dev); + dev_info(&mc_dev->dev, "DPRC device unbound from driver"); return 0; } diff --git a/include/linux/fsl/mc.h b/include/linux/fsl/mc.h index da11171bc38f..5519a510b8c9 100644 --- a/include/linux/fsl/mc.h +++ b/include/linux/fsl/mc.h @@ -538,6 +538,8 @@ void dprc_remove_devices(struct fsl_mc_device *mc_bus_dev, struct fsl_mc_obj_desc *obj_desc_array, int num_child_objects_in_mc); +int dprc_cleanup(struct fsl_mc_device *mc_dev); + /* * Data Path Buffer Pool (DPBP) API * Contains initialization APIs and runtime control APIs for DPBP |