@@ -228,17 +228,21 @@ static long linehandle_ioctl_compat(struct file *file, unsigned int cmd,
}
#endif
-static int linehandle_release(struct inode *inode, struct file *file)
+static void linehandle_free(struct linehandle_state *lh)
{
- struct linehandle_state *lh = file->private_data;
- struct gpio_device *gdev = lh->gdev;
int i;
for (i = 0; i < lh->num_descs; i++)
- gpiod_free(lh->descs[i]);
+ if (lh->descs[i])
+ gpiod_free(lh->descs[i]);
kfree(lh->label);
+ put_device(&lh->gdev->dev);
kfree(lh);
- put_device(&gdev->dev);
+}
+
+static int linehandle_release(struct inode *inode, struct file *file)
+{
+ linehandle_free(file->private_data);
return 0;
}
@@ -257,7 +261,7 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip)
struct gpiohandle_request handlereq;
struct linehandle_state *lh;
struct file *file;
- int fd, i, count = 0, ret;
+ int fd, i, ret;
u32 lflags;
if (copy_from_user(&handlereq, ip, sizeof(handlereq)))
@@ -288,6 +292,8 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip)
}
}
+ lh->num_descs = handlereq.lines;
+
/* Request each GPIO */
for (i = 0; i < handlereq.lines; i++) {
u32 offset = handlereq.lineoffsets[i];
@@ -295,19 +301,18 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip)
if (IS_ERR(desc)) {
ret = PTR_ERR(desc);
- goto out_free_descs;
+ goto out_free_lh;
}
ret = gpiod_request(desc, lh->label);
if (ret)
- goto out_free_descs;
+ goto out_free_lh;
lh->descs[i] = desc;
- count = i + 1;
linehandle_flags_to_desc_flags(handlereq.flags, &desc->flags);
ret = gpiod_set_transitory(desc, false);
if (ret < 0)
- goto out_free_descs;
+ goto out_free_lh;
/*
* Lines have to be requested explicitly for input
@@ -318,11 +323,11 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip)
ret = gpiod_direction_output(desc, val);
if (ret)
- goto out_free_descs;
+ goto out_free_lh;
} else if (lflags & GPIOHANDLE_REQUEST_INPUT) {
ret = gpiod_direction_input(desc);
if (ret)
- goto out_free_descs;
+ goto out_free_lh;
}
blocking_notifier_call_chain(&desc->gdev->notifier,
@@ -331,12 +336,11 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip)
dev_dbg(&gdev->dev, "registered chardev handle for line %d\n",
offset);
}
- lh->num_descs = handlereq.lines;
fd = get_unused_fd_flags(O_RDONLY | O_CLOEXEC);
if (fd < 0) {
ret = fd;
- goto out_free_descs;
+ goto out_free_lh;
}
file = anon_inode_getfile("gpio-linehandle",
@@ -368,13 +372,8 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip)
out_put_unused_fd:
put_unused_fd(fd);
-out_free_descs:
- for (i = 0; i < count; i++)
- gpiod_free(lh->descs[i]);
- kfree(lh->label);
out_free_lh:
- kfree(lh);
- put_device(&gdev->dev);
+ linehandle_free(lh);
return ret;
}
Consolidate the cleanup of linehandles, currently duplicated in linehandle_create and linehandle_release, into a helper function linehandle_free. Signed-off-by: Kent Gibson <warthog618@gmail.com> --- drivers/gpio/gpiolib-cdev.c | 39 ++++++++++++++++++------------------- 1 file changed, 19 insertions(+), 20 deletions(-)