[PATCH v3 2/4] floppy: add FD_AUTODETECT_SIZE define for struct floppy_drive_params

Denis Efremov
2020-05-01T13:47:15Z

Use FD_AUTODETECT_SIZE for autodetect buffer size in struct
floppy_drive_params instead of a magic number.

Signed-off-by: Denis Efremov <efremov@linux.com>
---
drivers/block/floppy.c | 9 +++++----
include/uapi/linux/fd.h | 5 ++++-
2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 3ab6e804b5ec..b82b3d38b834 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -2073,7 +2073,8 @@ static int next_valid_format(int drive)

probed_format = drive_state[drive].probed_format;
while (1) {
- if (probed_format >= 8 || !drive_params[drive].autodetect[probed_format]) {
+ if (probed_format >= FD_AUTODETECT_SIZE ||
+ !drive_params[drive].autodetect[probed_format]) {
drive_state[drive].probed_format = 0;
return 1;
}
@@ -3442,13 +3443,13 @@ static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
return 0;
}

-static bool valid_floppy_drive_params(const short autodetect[8],
+static bool valid_floppy_drive_params(const short autodetect[FD_AUTODETECT_SIZE],
int native_format)
{
size_t floppy_type_size = ARRAY_SIZE(floppy_type);
size_t i = 0;

- for (i = 0; i < 8; ++i) {
+ for (i = 0; i < FD_AUTODETECT_SIZE; ++i) {
if (autodetect[i] < 0 ||
autodetect[i] >= floppy_type_size)
return false;
@@ -3673,7 +3674,7 @@ struct compat_floppy_drive_params {
struct floppy_max_errors max_errors;
char flags;
char read_track;
- short autodetect[8];
+ short autodetect[FD_AUTODETECT_SIZE];
compat_int_t checkfreq;
compat_int_t native_format;
};
diff --git a/include/uapi/linux/fd.h b/include/uapi/linux/fd.h
index 90fb94712c41..3f6b7be4c096 100644
--- a/include/uapi/linux/fd.h
+++ b/include/uapi/linux/fd.h
@@ -172,7 +172,10 @@ struct floppy_drive_params {
* used in succession to try to read the disk. If the FDC cannot lock onto
* the disk, the next format is tried. This uses the variable 'probing'.
*/
- short autodetect[8]; /* autodetected formats */
+
+#define FD_AUTODETECT_SIZE 8
+
+ short autodetect[FD_AUTODETECT_SIZE]; /* autodetected formats */

int checkfreq; /* how often should the drive be checked for disk
* changes */
--
2.25.3