diff options
Diffstat (limited to 'drivers/misc/vmw_vmci/vmci_host.c')
| -rw-r--r-- | drivers/misc/vmw_vmci/vmci_host.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/misc/vmw_vmci/vmci_host.c b/drivers/misc/vmw_vmci/vmci_host.c index 1723a6e4f2e8..66fc9921fc85 100644 --- a/drivers/misc/vmw_vmci/vmci_host.c +++ b/drivers/misc/vmw_vmci/vmci_host.c @@ -218,13 +218,12 @@ static int drv_cp_harray_to_user(void __user *user_buf_uva, } /* - * Sets up a given context for notify to work. Calls drv_map_bool_ptr() - * which maps the notify boolean in user VA in kernel space. + * Sets up a given context for notify to work. Maps the notify + * boolean in user VA into kernel space. */ static int vmci_host_setup_notify(struct vmci_ctx *context, unsigned long uva) { - struct page *page; int retval; if (context->notify_page) { @@ -243,14 +242,16 @@ static int vmci_host_setup_notify(struct vmci_ctx *context, /* * Lock physical page backing a given user VA. */ - retval = get_user_pages_fast(PAGE_ALIGN(uva), 1, 1, &page); - if (retval != 1) + retval = get_user_pages_fast(uva, 1, 1, &context->notify_page); + if (retval != 1) { + context->notify_page = NULL; return VMCI_ERROR_GENERIC; + } /* * Map the locked page and set up notify pointer. */ - context->notify = kmap(page) + (uva & (PAGE_SIZE - 1)); + context->notify = kmap(context->notify_page) + (uva & (PAGE_SIZE - 1)); vmci_ctx_check_signal_notify(context); return VMCI_SUCCESS; |