msm: ipa3: Changes to fix memory leak issue

During adding/deleting header rule found invalid entry not
freeing the header proc memory allocation due to that IPA
context bank page table was full, later it was failed
to map pages. To avoid this issue adding change to
free the memory in failed scenarios.

Change-Id: I8e5fd68d35579b4638e91590f5df876aa9d256a6
Signed-off-by: Ashok Vuyyuru <[email protected]>

drivers/platform/msm/ipa/ipa_v3/ipa_hdr.c

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2012-2021, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include "ipa_i.h"
@@ -98,8 +99,10 @@ static int ipa3_hdr_proc_ctx_to_hw_format(struct ipa_mem_buffer *mem,
 
 		/* Check the pointer and header length to avoid dangerous overflow in HW */
 		if (unlikely(!entry->hdr || !entry->hdr->offset_entry ||
-			entry->hdr->hdr_len > ipa_hdr_bin_sz[IPA_HDR_BIN_MAX - 1]))
+			entry->hdr->hdr_len > ipa_hdr_bin_sz[IPA_HDR_BIN_MAX - 1])) {
+			IPAERR_RL("Found invalid hdr entry\n");
 			return -EINVAL;
+		}
 
 		ret = ipahal_cp_proc_ctx_to_hw_buff(entry->type, mem->base,
 				entry->offset_entry->offset,
@@ -130,6 +133,7 @@ static int ipa3_generate_hdr_proc_ctx_hw_tbl(u64 hdr_sys_addr,
 	struct ipa_mem_buffer *mem, struct ipa_mem_buffer *aligned_mem)
 {
 	gfp_t flag = GFP_KERNEL;
+	int ret;
 
 	mem->size = (ipa3_ctx->hdr_proc_ctx_tbl.end) ? : 4;
 
@@ -156,7 +160,12 @@ alloc:
 		(aligned_mem->phys_base - mem->phys_base);
 	aligned_mem->size = mem->size - IPA_HDR_PROC_CTX_TABLE_ALIGNMENT_BYTE;
 	memset(aligned_mem->base, 0, aligned_mem->size);
-	return ipa3_hdr_proc_ctx_to_hw_format(aligned_mem, hdr_sys_addr);
+	ret = ipa3_hdr_proc_ctx_to_hw_format(aligned_mem, hdr_sys_addr);
+	if (ret) {
+		dma_free_coherent(ipa3_ctx->pdev, mem->size, mem->base, mem->phys_base);
+		return ret;
+	}
+	return ret;
 }
 
 /**