msm: camera: jpeg: Use spin lock irqsave to avoid preemption

Use spin_lock_irqsave utility to avoid preemtpion of process_cmd thread
in jpeg. This can come in rare conditions when IRQ is received on same
CPU which is handling the thread.
Such cases will result in deadlock conditions.

CRs-Fixed: 3712176
Change-Id: Ib0d9997495272ab49a75b0419eb1e0fd84b1962c
Signed-off-by: Dharmender Sharma <[email protected]>

drivers/cam_jpeg/jpeg_hw/jpeg_dma_hw/jpeg_dma_core.c

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
- * Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2022-2024, Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <linux/of.h>
@@ -693,6 +693,7 @@ int cam_jpeg_dma_process_cmd(void *device_priv, uint32_t cmd_type,
 	uint32_t                             *num_pid = NULL;
 	struct cam_hw_soc_info               *soc_info = NULL;
 	int i, rc = 0;
+	unsigned long flags = 0;
 
 	if (!device_priv) {
 		CAM_ERR(CAM_JPEG, "Invalid arguments");
@@ -723,7 +724,7 @@ int cam_jpeg_dma_process_cmd(void *device_priv, uint32_t cmd_type,
 		}
 
 		irq_cb_data = &irq_cb->irq_cb_data;
-		spin_lock(&jpeg_dma_dev->hw_lock);
+		spin_lock_irqsave(&jpeg_dma_dev->hw_lock, flags);
 		if (irq_cb->b_set_cb) {
 			core_info->irq_cb.jpeg_hw_mgr_cb =
 				irq_cb->jpeg_hw_mgr_cb;
@@ -734,7 +735,7 @@ int cam_jpeg_dma_process_cmd(void *device_priv, uint32_t cmd_type,
 			core_info->irq_cb.irq_cb_data.jpeg_req = NULL;
 			core_info->irq_cb.irq_cb_data.private_data = NULL;
 		}
-		spin_unlock(&jpeg_dma_dev->hw_lock);
+		spin_unlock_irqrestore(&jpeg_dma_dev->hw_lock, flags);
 		rc = 0;
 		break;
 	}

drivers/cam_jpeg/jpeg_hw/jpeg_enc_hw/jpeg_enc_core.c

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
- * Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2022-2024, Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <linux/of.h>
@@ -784,6 +784,7 @@ int cam_jpeg_enc_process_cmd(void *device_priv, uint32_t cmd_type,
 	uint32_t    *num_pid = NULL;
 	struct cam_hw_soc_info               *soc_info = NULL;
 	int i, rc = 0;
+	unsigned long flags = 0;
 
 	if (!device_priv) {
 		CAM_ERR(CAM_JPEG, "Invalid arguments");
@@ -813,7 +814,7 @@ int cam_jpeg_enc_process_cmd(void *device_priv, uint32_t cmd_type,
 		}
 
 		irq_cb_data = &irq_cb->irq_cb_data;
-		spin_lock(&jpeg_enc_dev->hw_lock);
+		spin_lock_irqsave(&jpeg_enc_dev->hw_lock, flags);
 
 		if (irq_cb->b_set_cb) {
 			core_info->irq_cb.jpeg_hw_mgr_cb = irq_cb->jpeg_hw_mgr_cb;
@@ -824,7 +825,7 @@ int cam_jpeg_enc_process_cmd(void *device_priv, uint32_t cmd_type,
 			core_info->irq_cb.irq_cb_data.private_data = NULL;
 			core_info->irq_cb.irq_cb_data.jpeg_req = NULL;
 		}
-		spin_unlock(&jpeg_enc_dev->hw_lock);
+		spin_unlock_irqrestore(&jpeg_enc_dev->hw_lock, flags);
 		rc = 0;
 		break;
 	}