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Date: Thu, 8 May 2014 14:13:17 +0300
From: Tuomas Tynkkynen <tuomas.tynkkynen@....fi>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
linux-media@...r.kernel.org,
Tuomas Tynkkynen <tuomas.tynkkynen@....fi>
Subject: [PATCH v2] staging: lirc: Fix sparse warnings
Fix sparse warnings by adding __user and __iomem annotations where
necessary and removing certain unnecessary casts. While at it,
also use u32 in place of __u32.
Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@....fi>
---
Compile tested only.
v2 changes:
- introduce variable 'uptr' instead of open-coding (__u32 *)arg everywhere
- replaces __u32 with u32
- passes checkpatch --strict
drivers/staging/media/lirc/lirc_bt829.c | 6 ++---
drivers/staging/media/lirc/lirc_parallel.c | 26 ++++++++++++----------
drivers/staging/media/lirc/lirc_serial.c | 11 +++++-----
drivers/staging/media/lirc/lirc_sir.c | 33 ++++++++++++++--------------
drivers/staging/media/lirc/lirc_zilog.c | 23 +++++++++----------
5 files changed, 52 insertions(+), 47 deletions(-)
diff --git a/drivers/staging/media/lirc/lirc_bt829.c b/drivers/staging/media/lirc/lirc_bt829.c
index 30edc74..fe01054 100644
--- a/drivers/staging/media/lirc/lirc_bt829.c
+++ b/drivers/staging/media/lirc/lirc_bt829.c
@@ -64,7 +64,7 @@ static bool debug;
static int atir_minor;
static phys_addr_t pci_addr_phys;
-static unsigned char *pci_addr_lin;
+static unsigned char __iomem *pci_addr_lin;
static struct lirc_driver atir_driver;
@@ -382,7 +382,7 @@ static unsigned char do_get_bits(void)
static unsigned int read_index(unsigned char index)
{
- unsigned char *addr;
+ unsigned char __iomem *addr;
unsigned int value;
/* addr = pci_addr_lin + DATA_PCI_OFF + ((index & 0xFF) << 2); */
addr = pci_addr_lin + ((index & 0xFF) << 2);
@@ -392,7 +392,7 @@ static unsigned int read_index(unsigned char index)
static void write_index(unsigned char index, unsigned int reg_val)
{
- unsigned char *addr;
+ unsigned char __iomem *addr;
addr = pci_addr_lin + ((index & 0xFF) << 2);
writel(reg_val, addr);
}
diff --git a/drivers/staging/media/lirc/lirc_parallel.c b/drivers/staging/media/lirc/lirc_parallel.c
index 62f5137..1394f02 100644
--- a/drivers/staging/media/lirc/lirc_parallel.c
+++ b/drivers/staging/media/lirc/lirc_parallel.c
@@ -324,7 +324,8 @@ static loff_t lirc_lseek(struct file *filep, loff_t offset, int orig)
return -ESPIPE;
}
-static ssize_t lirc_read(struct file *filep, char *buf, size_t n, loff_t *ppos)
+static ssize_t lirc_read(struct file *filep, char __user *buf, size_t n,
+ loff_t *ppos)
{
int result = 0;
int count = 0;
@@ -362,7 +363,7 @@ static ssize_t lirc_read(struct file *filep, char *buf, size_t n, loff_t *ppos)
return count ? count : result;
}
-static ssize_t lirc_write(struct file *filep, const char *buf, size_t n,
+static ssize_t lirc_write(struct file *filep, const char __user *buf, size_t n,
loff_t *ppos)
{
int count;
@@ -463,43 +464,44 @@ static unsigned int lirc_poll(struct file *file, poll_table *wait)
static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
int result;
- __u32 features = LIRC_CAN_SET_TRANSMITTER_MASK |
- LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2;
- __u32 mode;
- __u32 value;
+ u32 __user *uptr = (u32 __user *)arg;
+ u32 features = LIRC_CAN_SET_TRANSMITTER_MASK |
+ LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2;
+ u32 mode;
+ u32 value;
switch (cmd) {
case LIRC_GET_FEATURES:
- result = put_user(features, (__u32 *) arg);
+ result = put_user(features, uptr);
if (result)
return result;
break;
case LIRC_GET_SEND_MODE:
- result = put_user(LIRC_MODE_PULSE, (__u32 *) arg);
+ result = put_user(LIRC_MODE_PULSE, uptr);
if (result)
return result;
break;
case LIRC_GET_REC_MODE:
- result = put_user(LIRC_MODE_MODE2, (__u32 *) arg);
+ result = put_user(LIRC_MODE_MODE2, uptr);
if (result)
return result;
break;
case LIRC_SET_SEND_MODE:
- result = get_user(mode, (__u32 *) arg);
+ result = get_user(mode, uptr);
if (result)
return result;
if (mode != LIRC_MODE_PULSE)
return -EINVAL;
break;
case LIRC_SET_REC_MODE:
- result = get_user(mode, (__u32 *) arg);
+ result = get_user(mode, uptr);
if (result)
return result;
if (mode != LIRC_MODE_MODE2)
return -ENOSYS;
break;
case LIRC_SET_TRANSMITTER_MASK:
- result = get_user(value, (__u32 *) arg);
+ result = get_user(value, uptr);
if (result)
return result;
if ((value & LIRC_PARALLEL_TRANSMITTER_MASK) != value)
diff --git a/drivers/staging/media/lirc/lirc_serial.c b/drivers/staging/media/lirc/lirc_serial.c
index 10c685d..dc5ba43 100644
--- a/drivers/staging/media/lirc/lirc_serial.c
+++ b/drivers/staging/media/lirc/lirc_serial.c
@@ -1011,7 +1011,8 @@ static ssize_t lirc_write(struct file *file, const char __user *buf,
static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
int result;
- __u32 value;
+ u32 __user *uptr = (u32 __user *)arg;
+ u32 value;
switch (cmd) {
case LIRC_GET_SEND_MODE:
@@ -1020,7 +1021,7 @@ static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
result = put_user(LIRC_SEND2MODE
(hardware[type].features&LIRC_CAN_SEND_MASK),
- (__u32 *) arg);
+ uptr);
if (result)
return result;
break;
@@ -1029,7 +1030,7 @@ static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
if (!(hardware[type].features&LIRC_CAN_SEND_MASK))
return -ENOIOCTLCMD;
- result = get_user(value, (__u32 *) arg);
+ result = get_user(value, uptr);
if (result)
return result;
/* only LIRC_MODE_PULSE supported */
@@ -1046,7 +1047,7 @@ static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
if (!(hardware[type].features&LIRC_CAN_SET_SEND_DUTY_CYCLE))
return -ENOIOCTLCMD;
- result = get_user(value, (__u32 *) arg);
+ result = get_user(value, uptr);
if (result)
return result;
if (value <= 0 || value > 100)
@@ -1059,7 +1060,7 @@ static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
if (!(hardware[type].features&LIRC_CAN_SET_SEND_CARRIER))
return -ENOIOCTLCMD;
- result = get_user(value, (__u32 *) arg);
+ result = get_user(value, uptr);
if (result)
return result;
if (value > 500000 || value < 20000)
diff --git a/drivers/staging/media/lirc/lirc_sir.c b/drivers/staging/media/lirc/lirc_sir.c
index f781c53..e31cbb8 100644
--- a/drivers/staging/media/lirc/lirc_sir.c
+++ b/drivers/staging/media/lirc/lirc_sir.c
@@ -187,10 +187,10 @@ static bool debug;
/* Communication with user-space */
static unsigned int lirc_poll(struct file *file, poll_table *wait);
-static ssize_t lirc_read(struct file *file, char *buf, size_t count,
- loff_t *ppos);
-static ssize_t lirc_write(struct file *file, const char *buf, size_t n,
- loff_t *pos);
+static ssize_t lirc_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos);
+static ssize_t lirc_write(struct file *file, const char __user *buf, size_t n,
+ loff_t *pos);
static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
static void add_read_queue(int flag, unsigned long val);
static int init_chrdev(void);
@@ -252,8 +252,8 @@ static unsigned int lirc_poll(struct file *file, poll_table *wait)
return 0;
}
-static ssize_t lirc_read(struct file *file, char *buf, size_t count,
- loff_t *ppos)
+static ssize_t lirc_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
{
int n = 0;
int retval = 0;
@@ -266,9 +266,9 @@ static ssize_t lirc_read(struct file *file, char *buf, size_t count,
set_current_state(TASK_INTERRUPTIBLE);
while (n < count) {
if (rx_head != rx_tail) {
- if (copy_to_user((void *) buf + n,
- (void *) (rx_buf + rx_head),
- sizeof(int))) {
+ if (copy_to_user(buf + n,
+ rx_buf + rx_head,
+ sizeof(int))) {
retval = -EFAULT;
break;
}
@@ -291,8 +291,8 @@ static ssize_t lirc_read(struct file *file, char *buf, size_t count,
set_current_state(TASK_RUNNING);
return n ? n : retval;
}
-static ssize_t lirc_write(struct file *file, const char *buf, size_t n,
- loff_t *pos)
+static ssize_t lirc_write(struct file *file, const char __user *buf, size_t n,
+ loff_t *pos)
{
unsigned long flags;
int i, count;
@@ -338,8 +338,9 @@ static ssize_t lirc_write(struct file *file, const char *buf, size_t n,
static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
+ u32 __user *uptr = (u32 __user *)arg;
int retval = 0;
- __u32 value = 0;
+ u32 value = 0;
#ifdef LIRC_ON_SA1100
if (cmd == LIRC_GET_FEATURES)
@@ -364,16 +365,16 @@ static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
case LIRC_GET_FEATURES:
case LIRC_GET_SEND_MODE:
case LIRC_GET_REC_MODE:
- retval = put_user(value, (__u32 *) arg);
+ retval = put_user(value, uptr);
break;
case LIRC_SET_SEND_MODE:
case LIRC_SET_REC_MODE:
- retval = get_user(value, (__u32 *) arg);
+ retval = get_user(value, uptr);
break;
#ifdef LIRC_ON_SA1100
case LIRC_SET_SEND_DUTY_CYCLE:
- retval = get_user(value, (__u32 *) arg);
+ retval = get_user(value, uptr);
if (retval)
return retval;
if (value <= 0 || value > 100)
@@ -388,7 +389,7 @@ static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
space_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
break;
case LIRC_SET_SEND_CARRIER:
- retval = get_user(value, (__u32 *) arg);
+ retval = get_user(value, uptr);
if (retval)
return retval;
if (value > 500000 || value < 20000)
diff --git a/drivers/staging/media/lirc/lirc_zilog.c b/drivers/staging/media/lirc/lirc_zilog.c
index e1feb61..3259aac 100644
--- a/drivers/staging/media/lirc/lirc_zilog.c
+++ b/drivers/staging/media/lirc/lirc_zilog.c
@@ -892,7 +892,8 @@ out:
}
/* copied from lirc_dev */
-static ssize_t read(struct file *filep, char *outbuf, size_t n, loff_t *ppos)
+static ssize_t read(struct file *filep, char __user *outbuf, size_t n,
+ loff_t *ppos)
{
struct IR *ir = filep->private_data;
struct IR_rx *rx;
@@ -954,7 +955,7 @@ static ssize_t read(struct file *filep, char *outbuf, size_t n, loff_t *ppos)
}
m = lirc_buffer_read(rbuf, buf);
if (m == rbuf->chunk_size) {
- ret = copy_to_user((void *)outbuf+written, buf,
+ ret = copy_to_user(outbuf + written, buf,
rbuf->chunk_size);
written += rbuf->chunk_size;
} else {
@@ -1094,8 +1095,8 @@ static int send_code(struct IR_tx *tx, unsigned int code, unsigned int key)
* sent to the device. We have a spin lock as per i2c documentation to prevent
* multiple concurrent sends which would probably cause the device to explode.
*/
-static ssize_t write(struct file *filep, const char *buf, size_t n,
- loff_t *ppos)
+static ssize_t write(struct file *filep, const char __user *buf, size_t n,
+ loff_t *ppos)
{
struct IR *ir = filep->private_data;
struct IR_tx *tx;
@@ -1237,6 +1238,7 @@ static unsigned int poll(struct file *filep, poll_table *wait)
static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
struct IR *ir = filep->private_data;
+ unsigned long __user *uptr = (unsigned long __user *)arg;
int result;
unsigned long mode, features;
@@ -1244,11 +1246,10 @@ static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
switch (cmd) {
case LIRC_GET_LENGTH:
- result = put_user((unsigned long)13,
- (unsigned long *)arg);
+ result = put_user(13UL, uptr);
break;
case LIRC_GET_FEATURES:
- result = put_user(features, (unsigned long *) arg);
+ result = put_user(features, uptr);
break;
case LIRC_GET_REC_MODE:
if (!(features&LIRC_CAN_REC_MASK))
@@ -1256,13 +1257,13 @@ static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
result = put_user(LIRC_REC2MODE
(features&LIRC_CAN_REC_MASK),
- (unsigned long *)arg);
+ uptr);
break;
case LIRC_SET_REC_MODE:
if (!(features&LIRC_CAN_REC_MASK))
return -ENOSYS;
- result = get_user(mode, (unsigned long *)arg);
+ result = get_user(mode, uptr);
if (!result && !(LIRC_MODE2REC(mode) & features))
result = -EINVAL;
break;
@@ -1270,13 +1271,13 @@ static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
if (!(features&LIRC_CAN_SEND_MASK))
return -ENOSYS;
- result = put_user(LIRC_MODE_PULSE, (unsigned long *) arg);
+ result = put_user(LIRC_MODE_PULSE, uptr);
break;
case LIRC_SET_SEND_MODE:
if (!(features&LIRC_CAN_SEND_MASK))
return -ENOSYS;
- result = get_user(mode, (unsigned long *) arg);
+ result = get_user(mode, uptr);
if (!result && mode != LIRC_MODE_PULSE)
return -EINVAL;
break;
--
1.7.9.5
--
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