diff options
| -rw-r--r-- | drivers/bus/fsl-mc/dprc-driver.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/drivers/bus/fsl-mc/dprc-driver.c b/drivers/bus/fsl-mc/dprc-driver.c index 5e70f9775a0e..a3c8d4869132 100644 --- a/drivers/bus/fsl-mc/dprc-driver.c +++ b/drivers/bus/fsl-mc/dprc-driver.c @@ -240,11 +240,11 @@ static void dprc_add_new_devices(struct fsl_mc_device *mc_bus_dev, int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev, bool alloc_interrupts) { - int num_child_objects; + int num_child_objects, num_child_objects2; int dprc_get_obj_failures; int error; - unsigned int irq_count = mc_bus_dev->obj_desc.irq_count; - struct fsl_mc_obj_desc *child_obj_desc_array = NULL; + unsigned int irq_count; + struct fsl_mc_obj_desc *child_obj_desc_array; struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev); error = dprc_get_obj_count(mc_bus_dev->mc_io, @@ -257,6 +257,9 @@ int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev, return error; } +retry: + irq_count = mc_bus_dev->obj_desc.irq_count; + child_obj_desc_array = NULL; if (num_child_objects != 0) { int i; @@ -315,6 +318,29 @@ int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev, } } + error = dprc_get_obj_count(mc_bus_dev->mc_io, + 0, + mc_bus_dev->mc_handle, + &num_child_objects2); + if (error < 0) { + if (child_obj_desc_array) + devm_kfree(&mc_bus_dev->dev, child_obj_desc_array); + dev_err(&mc_bus_dev->dev, "dprc_get_obj_count() failed: %d\n", + error); + return error; + } + + if (num_child_objects != num_child_objects2) { + /* + * Something changed while reading the number of objects. + * Retry reading the child object list. + */ + if (child_obj_desc_array) + devm_kfree(&mc_bus_dev->dev, child_obj_desc_array); + num_child_objects = num_child_objects2; + goto retry; + } + /* * Allocate IRQ's before binding the scanned devices with their * respective drivers. |