[PATCH 3/3] staging: Android: Fix sparse warnings in vsoc driver.
From: Alistair Strachan
Date: Thu May 03 2018 - 00:46:32 EST
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Arve HjÃnnevÃg <arve@xxxxxxxxxxx>
Cc: Todd Kjos <tkjos@xxxxxxxxxxx>
Cc: Martijn Coenen <maco@xxxxxxxxxxx>
Cc: Greg Hartman <ghartman@xxxxxxxxxx>
Cc: devel@xxxxxxxxxxxxxxxxxxxx
Cc: kernel-team@xxxxxxxxxxx
Signed-off-by: Alistair Strachan <astrachan@xxxxxxxxxx>
---
drivers/staging/android/vsoc.c | 100 ++++++++++++++++-----------------
1 file changed, 49 insertions(+), 51 deletions(-)
diff --git a/drivers/staging/android/vsoc.c b/drivers/staging/android/vsoc.c
index 3e6e4af7d6a1..954ed2c5d807 100644
--- a/drivers/staging/android/vsoc.c
+++ b/drivers/staging/android/vsoc.c
@@ -81,8 +81,8 @@ struct vsoc_region_data {
atomic_t *incoming_signalled;
/* Flag indicating the guest has signalled the host. */
atomic_t *outgoing_signalled;
- int irq_requested;
- int device_created;
+ bool irq_requested;
+ bool device_created;
};
struct vsoc_device {
@@ -91,7 +91,7 @@ struct vsoc_device {
/* Physical address of SHARED_MEMORY_BAR. */
phys_addr_t shm_phys_start;
/* Kernel virtual address of SHARED_MEMORY_BAR. */
- void *kernel_mapped_shm;
+ void __iomem *kernel_mapped_shm;
/* Size of the entire shared memory window in bytes. */
size_t shm_size;
/*
@@ -116,22 +116,23 @@ struct vsoc_device {
* vsoc_region_data because the kernel deals with them as an array.
*/
struct msix_entry *msix_entries;
- /*
- * Flags that indicate what we've initialzied. These are used to do an
- * orderly cleanup of the device.
- */
- char enabled_device;
- char requested_regions;
- char cdev_added;
- char class_added;
- char msix_enabled;
/* Mutex that protectes the permission list */
struct mutex mtx;
/* Major number assigned by the kernel */
int major;
-
+ /* Character device assigned by the kernel */
struct cdev cdev;
+ /* Device class assigned by the kernel */
struct class *class;
+ /*
+ * Flags that indicate what we've initialized. These are used to do an
+ * orderly cleanup of the device.
+ */
+ bool enabled_device;
+ bool requested_regions;
+ bool cdev_added;
+ bool class_added;
+ bool msix_enabled;
};
static struct vsoc_device vsoc_dev;
@@ -153,13 +154,13 @@ static long vsoc_ioctl(struct file *, unsigned int, unsigned long);
static int vsoc_mmap(struct file *, struct vm_area_struct *);
static int vsoc_open(struct inode *, struct file *);
static int vsoc_release(struct inode *, struct file *);
-static ssize_t vsoc_read(struct file *, char *, size_t, loff_t *);
-static ssize_t vsoc_write(struct file *, const char *, size_t, loff_t *);
+static ssize_t vsoc_read(struct file *, char __user *, size_t, loff_t *);
+static ssize_t vsoc_write(struct file *, const char __user *, size_t, loff_t *);
static loff_t vsoc_lseek(struct file *filp, loff_t offset, int origin);
static int do_create_fd_scoped_permission(
struct vsoc_device_region *region_p,
struct fd_scoped_permission_node *np,
- struct fd_scoped_permission_arg *__user arg);
+ struct fd_scoped_permission_arg __user *arg);
static void do_destroy_fd_scoped_permission(
struct vsoc_device_region *owner_region_p,
struct fd_scoped_permission *perm);
@@ -198,7 +199,7 @@ inline int vsoc_validate_filep(struct file *filp)
/* Converts from shared memory offset to virtual address */
static inline void *shm_off_to_virtual_addr(__u32 offset)
{
- return vsoc_dev.kernel_mapped_shm + offset;
+ return (void __force *)vsoc_dev.kernel_mapped_shm + offset;
}
/* Converts from shared memory offset to physical address */
@@ -261,7 +262,7 @@ static struct pci_driver vsoc_pci_driver = {
static int do_create_fd_scoped_permission(
struct vsoc_device_region *region_p,
struct fd_scoped_permission_node *np,
- struct fd_scoped_permission_arg *__user arg)
+ struct fd_scoped_permission_arg __user *arg)
{
struct file *managed_filp;
s32 managed_fd;
@@ -632,11 +633,11 @@ static long vsoc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return 0;
}
-static ssize_t vsoc_read(struct file *filp, char *buffer, size_t len,
+static ssize_t vsoc_read(struct file *filp, char __user *buffer, size_t len,
loff_t *poffset)
{
__u32 area_off;
- void *area_p;
+ const void *area_p;
ssize_t area_len;
int retval = vsoc_validate_filep(filp);
@@ -706,7 +707,7 @@ static loff_t vsoc_lseek(struct file *filp, loff_t offset, int origin)
return offset;
}
-static ssize_t vsoc_write(struct file *filp, const char *buffer,
+static ssize_t vsoc_write(struct file *filp, const char __user *buffer,
size_t len, loff_t *poffset)
{
__u32 area_off;
@@ -772,14 +773,14 @@ static int vsoc_probe_device(struct pci_dev *pdev,
pci_name(pdev), result);
return result;
}
- vsoc_dev.enabled_device = 1;
+ vsoc_dev.enabled_device = true;
result = pci_request_regions(pdev, "vsoc");
if (result < 0) {
dev_err(&pdev->dev, "pci_request_regions failed\n");
vsoc_remove_device(pdev);
return -EBUSY;
}
- vsoc_dev.requested_regions = 1;
+ vsoc_dev.requested_regions = true;
/* Set up the control registers in BAR 0 */
reg_size = pci_resource_len(pdev, REGISTER_BAR);
if (reg_size > MAX_REGISTER_BAR_LEN)
@@ -790,7 +791,7 @@ static int vsoc_probe_device(struct pci_dev *pdev,
if (!vsoc_dev.regs) {
dev_err(&pdev->dev,
- "cannot ioremap registers of size %zu\n",
+ "cannot map registers of size %zu\n",
(size_t)reg_size);
vsoc_remove_device(pdev);
return -EBUSY;
@@ -809,8 +810,8 @@ static int vsoc_probe_device(struct pci_dev *pdev,
return -EBUSY;
}
- vsoc_dev.layout =
- (struct vsoc_shm_layout_descriptor *)vsoc_dev.kernel_mapped_shm;
+ vsoc_dev.layout = (struct vsoc_shm_layout_descriptor __force *)
+ vsoc_dev.kernel_mapped_shm;
dev_info(&pdev->dev, "major_version: %d\n",
vsoc_dev.layout->major_version);
dev_info(&pdev->dev, "minor_version: %d\n",
@@ -841,16 +842,16 @@ static int vsoc_probe_device(struct pci_dev *pdev,
vsoc_remove_device(pdev);
return -EBUSY;
}
- vsoc_dev.cdev_added = 1;
+ vsoc_dev.cdev_added = true;
vsoc_dev.class = class_create(THIS_MODULE, VSOC_DEV_NAME);
if (IS_ERR(vsoc_dev.class)) {
dev_err(&vsoc_dev.dev->dev, "class_create failed\n");
vsoc_remove_device(pdev);
return PTR_ERR(vsoc_dev.class);
}
- vsoc_dev.class_added = 1;
- vsoc_dev.regions = (struct vsoc_device_region *)
- (vsoc_dev.kernel_mapped_shm +
+ vsoc_dev.class_added = true;
+ vsoc_dev.regions = (struct vsoc_device_region __force *)
+ ((void *)vsoc_dev.layout +
vsoc_dev.layout->vsoc_region_desc_offset);
vsoc_dev.msix_entries = kcalloc(
vsoc_dev.layout->region_count,
@@ -910,7 +911,7 @@ static int vsoc_probe_device(struct pci_dev *pdev,
return -EFAULT;
}
}
- vsoc_dev.msix_enabled = 1;
+ vsoc_dev.msix_enabled = true;
for (i = 0; i < vsoc_dev.layout->region_count; ++i) {
const struct vsoc_device_region *region = vsoc_dev.regions + i;
size_t name_sz = sizeof(vsoc_dev.regions_data[i].name) - 1;
@@ -928,14 +929,11 @@ static int vsoc_probe_device(struct pci_dev *pdev,
&vsoc_dev.regions_data[i].interrupt_wait_queue);
init_waitqueue_head(&vsoc_dev.regions_data[i].futex_wait_queue);
vsoc_dev.regions_data[i].incoming_signalled =
- vsoc_dev.kernel_mapped_shm +
- region->region_begin_offset +
+ shm_off_to_virtual_addr(region->region_begin_offset) +
h_to_g_signal_table->interrupt_signalled_offset;
vsoc_dev.regions_data[i].outgoing_signalled =
- vsoc_dev.kernel_mapped_shm +
- region->region_begin_offset +
+ shm_off_to_virtual_addr(region->region_begin_offset) +
g_to_h_signal_table->interrupt_signalled_offset;
-
result = request_irq(
vsoc_dev.msix_entries[i].vector,
vsoc_interrupt, 0,
@@ -948,7 +946,7 @@ static int vsoc_probe_device(struct pci_dev *pdev,
vsoc_remove_device(pdev);
return -ENOSPC;
}
- vsoc_dev.regions_data[i].irq_requested = 1;
+ vsoc_dev.regions_data[i].irq_requested = true;
if (!device_create(vsoc_dev.class, NULL,
MKDEV(vsoc_dev.major, i),
NULL, vsoc_dev.regions_data[i].name)) {
@@ -956,7 +954,7 @@ static int vsoc_probe_device(struct pci_dev *pdev,
vsoc_remove_device(pdev);
return -EBUSY;
}
- vsoc_dev.regions_data[i].device_created = 1;
+ vsoc_dev.regions_data[i].device_created = true;
}
return 0;
}
@@ -988,51 +986,51 @@ static void vsoc_remove_device(struct pci_dev *pdev)
if (vsoc_dev.regions_data[i].device_created) {
device_destroy(vsoc_dev.class,
MKDEV(vsoc_dev.major, i));
- vsoc_dev.regions_data[i].device_created = 0;
+ vsoc_dev.regions_data[i].device_created = false;
}
if (vsoc_dev.regions_data[i].irq_requested)
free_irq(vsoc_dev.msix_entries[i].vector, NULL);
- vsoc_dev.regions_data[i].irq_requested = 0;
+ vsoc_dev.regions_data[i].irq_requested = false;
}
kfree(vsoc_dev.regions_data);
- vsoc_dev.regions_data = 0;
+ vsoc_dev.regions_data = NULL;
}
if (vsoc_dev.msix_enabled) {
pci_disable_msix(pdev);
- vsoc_dev.msix_enabled = 0;
+ vsoc_dev.msix_enabled = false;
}
kfree(vsoc_dev.msix_entries);
- vsoc_dev.msix_entries = 0;
- vsoc_dev.regions = 0;
+ vsoc_dev.msix_entries = NULL;
+ vsoc_dev.regions = NULL;
if (vsoc_dev.class_added) {
class_destroy(vsoc_dev.class);
- vsoc_dev.class_added = 0;
+ vsoc_dev.class_added = false;
}
if (vsoc_dev.cdev_added) {
cdev_del(&vsoc_dev.cdev);
- vsoc_dev.cdev_added = 0;
+ vsoc_dev.cdev_added = false;
}
if (vsoc_dev.major && vsoc_dev.layout) {
unregister_chrdev_region(MKDEV(vsoc_dev.major, 0),
vsoc_dev.layout->region_count);
vsoc_dev.major = 0;
}
- vsoc_dev.layout = 0;
+ vsoc_dev.layout = NULL;
if (vsoc_dev.kernel_mapped_shm) {
pci_iounmap(pdev, vsoc_dev.kernel_mapped_shm);
- vsoc_dev.kernel_mapped_shm = 0;
+ vsoc_dev.kernel_mapped_shm = NULL;
}
if (vsoc_dev.regs) {
pci_iounmap(pdev, vsoc_dev.regs);
- vsoc_dev.regs = 0;
+ vsoc_dev.regs = NULL;
}
if (vsoc_dev.requested_regions) {
pci_release_regions(pdev);
- vsoc_dev.requested_regions = 0;
+ vsoc_dev.requested_regions = false;
}
if (vsoc_dev.enabled_device) {
pci_disable_device(pdev);
- vsoc_dev.enabled_device = 0;
+ vsoc_dev.enabled_device = false;
}
/* Do this last: it indicates that the device is not initialized. */
vsoc_dev.dev = NULL;