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Subject[PATCH 09/13] drivers/block/floppy.c: Convert raw_cmd_copyin from while(1) to label: goto
Date
Reduces indent
Makes a bit more readable and intelligible
Return value now at bottom of function

Signed-off-by: Joe Perches <joe@perches.com>
---
drivers/block/floppy.c | 73 +++++++++++++++++++++++++-----------------------
1 files changed, 38 insertions(+), 35 deletions(-)

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 5bad295..e089b69 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3126,6 +3126,7 @@ static inline int raw_cmd_copyout(int cmd, void __user *param,
}
ptr = ptr->next;
}
+
return 0;
}

@@ -3156,18 +3157,19 @@ static inline int raw_cmd_copyin(int cmd, void __user *param,
int i;

*rcmd = NULL;
- while (1) {
- ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
- if (!ptr)
- return -ENOMEM;
- *rcmd = ptr;
- ret = copy_from_user(ptr, param, sizeof(*ptr));
- if (ret)
- return -EFAULT;
- ptr->next = NULL;
- ptr->buffer_length = 0;
- param += sizeof(struct floppy_raw_cmd);
- if (ptr->cmd_count > 33)
+
+loop:
+ ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
+ if (!ptr)
+ return -ENOMEM;
+ *rcmd = ptr;
+ ret = copy_from_user(ptr, param, sizeof(*ptr));
+ if (ret)
+ return -EFAULT;
+ ptr->next = NULL;
+ ptr->buffer_length = 0;
+ param += sizeof(struct floppy_raw_cmd);
+ if (ptr->cmd_count > 33)
/* the command may now also take up the space
* initially intended for the reply & the
* reply count. Needed for long 82078 commands
@@ -3176,34 +3178,35 @@ static inline int raw_cmd_copyin(int cmd, void __user *param,
* 16 bytes for a structure, you'll one day
* discover that you really need 17...
*/
+ return -EINVAL;
+
+ for (i = 0; i < 16; i++)
+ ptr->reply[i] = 0;
+ ptr->resultcode = 0;
+ ptr->kernel_data = NULL;
+
+ if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
+ if (ptr->length <= 0)
return -EINVAL;
+ ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length);
+ fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
+ if (!ptr->kernel_data)
+ return -ENOMEM;
+ ptr->buffer_length = ptr->length;
+ }
+ if (ptr->flags & FD_RAW_WRITE) {
+ ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length);
+ if (ret)
+ return ret;
+ }

- for (i = 0; i < 16; i++)
- ptr->reply[i] = 0;
- ptr->resultcode = 0;
- ptr->kernel_data = NULL;
-
- if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
- if (ptr->length <= 0)
- return -EINVAL;
- ptr->kernel_data =
- (char *)fd_dma_mem_alloc(ptr->length);
- fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
- if (!ptr->kernel_data)
- return -ENOMEM;
- ptr->buffer_length = ptr->length;
- }
- if (ptr->flags & FD_RAW_WRITE) {
- ret = fd_copyin(ptr->data, ptr->kernel_data,
- ptr->length);
- if (ret)
- return ret;
- }
+ if (ptr->flags & FD_RAW_MORE) {
rcmd = &(ptr->next);
- if (!(ptr->flags & FD_RAW_MORE))
- return 0;
ptr->rate &= 0x43;
+ goto loop;
}
+
+ return 0;
}

static int raw_cmd_ioctl(int cmd, void __user *param)
--
1.6.6.rc0.57.gad7a


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