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PCI: rockchip: dw: Add dev mutex to protect elbi0 irq user

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Change-Id: I9dad204d1d714ecbfa9ac0872123e0001499b981
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
This commit is contained in:
Jon Lin
2023-12-20 09:38:30 +08:00
committed by Tao Huang
parent bd14f96e5e
commit 8dc5855332
1 changed files with 4 additions and 3 deletions
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7
drivers/misc/rockchip/pcie-rkep.c
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@@ -119,7 +119,7 @@ struct pcie_rkep {
struct dma_trx_obj *dma_obj;
struct pcie_ep_obj_info *obj_info;
struct page *user_pages; /* Allocated physical memory for user space */
struct mutex dev_lock_mutex;
struct mutex dev_lock_mutex; /* Sync resources in multi-process, such as vid and ELBI0 */
DECLARE_BITMAP(virtual_id_bitmap, RKEP_EP_VIRTUAL_ID_MAX);
DECLARE_BITMAP(virtual_id_irq_bitmap, RKEP_EP_VIRTUAL_ID_MAX);
wait_queue_head_t wq_head;
@@ -220,10 +220,9 @@ static int rkep_ep_raise_elbi_irq(struct pcie_file *pcie_file, u32 interrupt_num
if (i >= gap_us)
dev_err(&pcie_rkep->pdev->dev, "elbi int is not clear, status=%x\n", val);
mutex_lock(&pcie_file->file_lock_mutex);
ret = pci_write_config_dword(pcie_rkep->pdev, PCIE_CFG_ELBI_APP_OFFSET + 4 * index,
(1 << (off + 16)) | (1 << off));
mutex_unlock(&pcie_file->file_lock_mutex);
return ret;
}
@@ -240,7 +239,9 @@ static int rkep_ep_raise_irq_user_obj(struct pcie_file *pcie_file, u32 index)
pcie_rkep->obj_info->irq_type_ep = OBJ_IRQ_USER;
pcie_rkep->obj_info->irq_user_data_ep = index;
mutex_lock(&pcie_rkep->dev_lock_mutex);
ret = rkep_ep_raise_elbi_irq(pcie_file, 0);
mutex_unlock(&pcie_rkep->dev_lock_mutex);
return ret;
}