From 120d28bad9890eca3a6451a83a7c71cb650dfef7 Mon Sep 17 00:00:00 2001
From: "Poddar, Siddarth" <siddpodd@codeaurora.org>
Date: Wed, 5 Jul 2017 12:31:03 +0530
Subject: [PATCH] qcacld-2.0: Remove code related to mmap functionality for
 pktlog

Remove the code related to mmap functionality for pktlog
as it is no longer used/required.

Bug: 62084791
Change-Id: I06767f108c0ff6462a9e20e7b50d08bf4ac9555f
CRs-Fixed: 2064767
Signed-off-by: Ahmed ElArabawy <arabawy@google.com>
---
 .../qcacld-2.0/CORE/UTILS/PKTLOG/linux_ac.c        | 102 ---------------------
 1 file changed, 102 deletions(-)

diff --git a/drivers/staging/qcacld-2.0/CORE/UTILS/PKTLOG/linux_ac.c b/drivers/staging/qcacld-2.0/CORE/UTILS/PKTLOG/linux_ac.c
index 173ed4e8eec1a..ec61b77e827cf 100644
--- a/drivers/staging/qcacld-2.0/CORE/UTILS/PKTLOG/linux_ac.c
+++ b/drivers/staging/qcacld-2.0/CORE/UTILS/PKTLOG/linux_ac.c
@@ -82,14 +82,12 @@ static int pktlog_attach(struct ol_softc *sc);
 static void pktlog_detach(struct ol_softc *sc);
 static int pktlog_open(struct inode *i, struct file *f);
 static int pktlog_release(struct inode *i, struct file *f);
-static int pktlog_mmap(struct file *f, struct vm_area_struct *vma);
 static ssize_t pktlog_read(struct file *file, char *buf, size_t nbytes,
 			   loff_t * ppos);
 
 static struct file_operations pktlog_fops = {
 	open:pktlog_open,
 	release:pktlog_release,
-	mmap:pktlog_mmap,
 	read:pktlog_read,
 };
 
@@ -921,106 +919,6 @@ static volatile void *pktlog_virt_to_logical(volatile void *addr)
 }
 #endif
 
-/* vma operations for mapping vmalloced area to user space */
-static void pktlog_vopen(struct vm_area_struct *vma)
-{
-	PKTLOG_MOD_INC_USE_COUNT;
-}
-
-static void pktlog_vclose(struct vm_area_struct *vma)
-{
-	PKTLOG_MOD_DEC_USE_COUNT;
-}
-
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,25)
-int pktlog_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
-{
-	unsigned long address = (unsigned long)vmf->virtual_address;
-
-	if (address == 0UL)
-		return VM_FAULT_NOPAGE;
-
-	if (vmf->pgoff > vma->vm_end)
-		return VM_FAULT_SIGBUS;
-
-	get_page(virt_to_page((void *)address));
-	vmf->page = virt_to_page((void *)address);
-	return VM_FAULT_MINOR;
-}
-#else
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
-struct page *pktlog_vmmap(struct vm_area_struct *vma, unsigned long addr,
-			  int *type)
-#else
-struct page *pktlog_vmmap(struct vm_area_struct *vma, unsigned long addr,
-			  int write_access)
-#endif
-{
-	unsigned long offset, vaddr;
-	struct proc_dir_entry *proc_entry;
-	struct ath_pktlog_info *pl_info =
-
-	proc_entry = PDE(vma->vm_file->f_dentry->d_inode);
-	pl_info = (struct ath_pktlog_info *)proc_entry->data;
-
-	offset = addr - vma->vm_start + (vma->vm_pgoff << PAGE_SHIFT);
-	vaddr = (unsigned long) pktlog_virt_to_logical(
-					(void *)(pl_info->buf) + offset);
-
-	if (vaddr == 0UL) {
-		printk(PKTLOG_TAG "%s: page fault out of range\n", __func__);
-		return ((struct page *) 0UL);
-	}
-
-	/* increment the usage count of the page */
-	get_page(virt_to_page((void*)vaddr));
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
-	if (type)
-		*type = VM_FAULT_MINOR;
-#endif
-
-	return virt_to_page((void *)vaddr);
-}
-#endif /* LINUX_VERSION_CODE > KERNEL_VERSION(2,6,25) */
-
-static struct vm_operations_struct pktlog_vmops = {
-	open:pktlog_vopen,
-	close:pktlog_vclose,
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,25)
-	fault:pktlog_fault,
-#else
-	nopage:pktlog_vmmap,
-#endif
-};
-
-static int pktlog_mmap(struct file *file, struct vm_area_struct *vma)
-{
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
-	struct ath_pktlog_info *pl_info = (struct ath_pktlog_info *)
-					  PDE_DATA(file->f_path.dentry->d_inode);
-#else
-	struct proc_dir_entry *proc_entry = PDE(file->f_dentry->d_inode);
-	struct ath_pktlog_info *pl_info = (struct ath_pktlog_info *)
-					  proc_entry->data;
-#endif
-
-	if (vma->vm_pgoff != 0) {
-		/* Entire buffer should be mapped */
-		return -EINVAL;
-	}
-
-	if (!pl_info->buf) {
-		printk(PKTLOG_TAG "%s: Log buffer unavailable\n", __func__);
-		return -ENOMEM;
-	}
-
-	vma->vm_flags |= VM_LOCKED;
-	vma->vm_ops = &pktlog_vmops;
-	pktlog_vopen(vma);
-	return 0;
-}
-
 int pktlogmod_init(void *context)
 {
 	int ret;