mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
172d59ecd6
The mutex_unlock() is missed on error path of psil_get_ep_config()
which causes deadlock, so add missed mutex_unlock().
Fixes: 8c6bb62f6b ("dmaengine: ti: k3 PSI-L remote endpoint configuration")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200408185501.30776-1-grygorii.strashko@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
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* Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
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*/
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include "k3-psil-priv.h"
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static DEFINE_MUTEX(ep_map_mutex);
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static struct psil_ep_map *soc_ep_map;
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struct psil_endpoint_config *psil_get_ep_config(u32 thread_id)
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{
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int i;
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mutex_lock(&ep_map_mutex);
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if (!soc_ep_map) {
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if (of_machine_is_compatible("ti,am654")) {
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soc_ep_map = &am654_ep_map;
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} else if (of_machine_is_compatible("ti,j721e")) {
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soc_ep_map = &j721e_ep_map;
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} else {
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pr_err("PSIL: No compatible machine found for map\n");
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mutex_unlock(&ep_map_mutex);
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return ERR_PTR(-ENOTSUPP);
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}
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pr_debug("%s: Using map for %s\n", __func__, soc_ep_map->name);
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}
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mutex_unlock(&ep_map_mutex);
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if (thread_id & K3_PSIL_DST_THREAD_ID_OFFSET && soc_ep_map->dst) {
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/* check in destination thread map */
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for (i = 0; i < soc_ep_map->dst_count; i++) {
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if (soc_ep_map->dst[i].thread_id == thread_id)
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return &soc_ep_map->dst[i].ep_config;
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}
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}
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thread_id &= ~K3_PSIL_DST_THREAD_ID_OFFSET;
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if (soc_ep_map->src) {
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for (i = 0; i < soc_ep_map->src_count; i++) {
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if (soc_ep_map->src[i].thread_id == thread_id)
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return &soc_ep_map->src[i].ep_config;
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}
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}
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return ERR_PTR(-ENOENT);
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}
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EXPORT_SYMBOL_GPL(psil_get_ep_config);
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int psil_set_new_ep_config(struct device *dev, const char *name,
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struct psil_endpoint_config *ep_config)
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{
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struct psil_endpoint_config *dst_ep_config;
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struct of_phandle_args dma_spec;
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u32 thread_id;
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int index;
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if (!dev || !dev->of_node)
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return -EINVAL;
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index = of_property_match_string(dev->of_node, "dma-names", name);
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if (index < 0)
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return index;
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if (of_parse_phandle_with_args(dev->of_node, "dmas", "#dma-cells",
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index, &dma_spec))
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return -ENOENT;
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thread_id = dma_spec.args[0];
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dst_ep_config = psil_get_ep_config(thread_id);
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if (IS_ERR(dst_ep_config)) {
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pr_err("PSIL: thread ID 0x%04x not defined in map\n",
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thread_id);
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of_node_put(dma_spec.np);
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return PTR_ERR(dst_ep_config);
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}
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memcpy(dst_ep_config, ep_config, sizeof(*dst_ep_config));
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of_node_put(dma_spec.np);
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return 0;
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}
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EXPORT_SYMBOL_GPL(psil_set_new_ep_config);
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