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bus/fsl-mc: Do no longer export the total number of irqs outside dprc_scan_objects 

The total number of interrupts is only used for some checks
outside the dprc_scan_objects function. Furthermore, in some
situations the check is made twice. Move the bounds check inside
the function for all situations.

Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Acked-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@oss.nxp.com>
Link: https://lore.kernel.org/r/20200929085441.17448-2-diana.craciun@oss.nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Diana Craciun 2020-09-29 11:54:29 +03:00 committed by Greg Kroah-Hartman
parent 675f0ad404
commit 7490cf5e18
1 changed files with 10 additions and 20 deletions
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30
drivers/bus/fsl-mc/dprc-driver.c
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@ -3,6 +3,7 @@
* Freescale data path resource container (DPRC) driver
*
* Copyright (C) 2014-2016 Freescale Semiconductor, Inc.
* Copyright 2019-2020 NXP
* Author: German Rivera <German.Rivera@freescale.com>
*
*/
@ -220,8 +221,6 @@ static void dprc_add_new_devices(struct fsl_mc_device *mc_bus_dev,
* dprc_scan_objects - Discover objects in a DPRC
*
* @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object
* @total_irq_count: If argument is provided the function populates the
* total number of IRQs created by objects in the DPRC.
*
* Detects objects added and removed from a DPRC and synchronizes the
* state of the Linux bus driver, MC by adding and removing
@ -235,8 +234,7 @@ static void dprc_add_new_devices(struct fsl_mc_device *mc_bus_dev,
* populated before they can get allocation requests from probe callbacks
* of the device drivers for the non-allocatable devices.
*/
static int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev,
unsigned int *total_irq_count)
static int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev)
{
int num_child_objects;
int dprc_get_obj_failures;
@ -317,22 +315,21 @@ static int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev,
* Allocate IRQ's before binding the scanned devices with their
* respective drivers.
*/
if (dev_get_msi_domain(&mc_bus_dev->dev) && !mc_bus->irq_resources) {
if (dev_get_msi_domain(&mc_bus_dev->dev)) {
if (irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS) {
dev_warn(&mc_bus_dev->dev,
"IRQs needed (%u) exceed IRQs preallocated (%u)\n",
irq_count, FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS);
}
error = fsl_mc_populate_irq_pool(mc_bus,
if (!mc_bus->irq_resources) {
error = fsl_mc_populate_irq_pool(mc_bus,
FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS);
if (error < 0)
return error;
if (error < 0)
return error;
}
}
if (total_irq_count)
*total_irq_count = irq_count;
dprc_remove_devices(mc_bus_dev, child_obj_desc_array,
num_child_objects);
@ -365,7 +362,7 @@ static int dprc_scan_container(struct fsl_mc_device *mc_bus_dev)
* Discover objects in the DPRC:
*/
mutex_lock(&mc_bus->scan_mutex);
error = dprc_scan_objects(mc_bus_dev, NULL);
error = dprc_scan_objects(mc_bus_dev);
mutex_unlock(&mc_bus->scan_mutex);
if (error < 0) {
fsl_mc_cleanup_all_resource_pools(mc_bus_dev);
@ -434,9 +431,8 @@ static irqreturn_t dprc_irq0_handler_thread(int irq_num, void *arg)
DPRC_IRQ_EVENT_CONTAINER_DESTROYED |
DPRC_IRQ_EVENT_OBJ_DESTROYED |
DPRC_IRQ_EVENT_OBJ_CREATED)) {
unsigned int irq_count;
error = dprc_scan_objects(mc_dev, &irq_count);
error = dprc_scan_objects(mc_dev);
if (error < 0) {
/*
* If the error is -ENXIO, we ignore it, as it indicates
@ -451,12 +447,6 @@ static irqreturn_t dprc_irq0_handler_thread(int irq_num, void *arg)
goto out;
}
if (irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS) {
dev_warn(dev,
"IRQs needed (%u) exceed IRQs preallocated (%u)\n",
irq_count, FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS);
}
}
out: