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scsi: cxlflash: Change return type for fault handler 

Use new return type vm_fault_t for fault handler. For now, this is just
documenting that the function returns a VM_FAULT value rather than an
errno. Once all instances are converted, vm_fault_t will become a distinct
type.

Ref-> commit 1c8f422059 ("mm: change return type to vm_fault_t")

Previously, VM_FAULT_NOPAGE was returned without verifying return value of
vm_insert_pfn. The new inline vmf_insert_pfn() will address this issue by
returning correct VM_FAULT_* type from fault handler.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Souptick Joarder 2018-06-20 23:55:07 +05:30 committed by Martin K. Petersen
parent 4ae5e9d159
commit a38b80c5f4
2 changed files with 5 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/scsi/cxlflash/ocxl_hw.c
View File

@ -1158,7 +1158,7 @@ static int afu_release(struct inode *inode, struct file *file)
*
* Return: 0 on success, -errno on failure
*/
static int ocxlflash_mmap_fault(struct vm_fault *vmf)
static vm_fault_t ocxlflash_mmap_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct ocxlflash_context *ctx = vma->vm_file->private_data;
@ -1181,8 +1181,7 @@ static int ocxlflash_mmap_fault(struct vm_fault *vmf)
mmio_area = ctx->psn_phys;
mmio_area += offset;
vm_insert_pfn(vma, vmf->address, mmio_area >> PAGE_SHIFT);
return VM_FAULT_NOPAGE;
return vmf_insert_pfn(vma, vmf->address, mmio_area >> PAGE_SHIFT);
}
static const struct vm_operations_struct ocxlflash_vmops = {

6
drivers/scsi/cxlflash/superpipe.c
View File

@ -1108,7 +1108,7 @@ out:
*
* Return: 0 on success, VM_FAULT_SIGBUS on failure
*/
static int cxlflash_mmap_fault(struct vm_fault *vmf)
static vm_fault_t cxlflash_mmap_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct file *file = vma->vm_file;
@ -1119,7 +1119,7 @@ static int cxlflash_mmap_fault(struct vm_fault *vmf)
struct ctx_info *ctxi = NULL;
struct page *err_page = NULL;
enum ctx_ctrl ctrl = CTX_CTRL_ERR_FALLBACK | CTX_CTRL_FILE;
int rc = 0;
vm_fault_t rc = 0;
int ctxid;
ctxid = cfg->ops->process_element(ctx);
@ -1159,7 +1159,7 @@ static int cxlflash_mmap_fault(struct vm_fault *vmf)
out:
if (likely(ctxi))
put_context(ctxi);
dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
dev_dbg(dev, "%s: returning rc=%x\n", __func__, rc);
return rc;
err: