ide: decrease size of ->pc_buf field in struct ide_atapi_pc

struct ide_atapi_pc is often allocated on the stack and size of ->pc_buf
size is 256 bytes.  However since only ide_floppy_create_read_capacity_cmd()
and idetape_create_inquiry_cmd() require such size allocate buffers for
these pc-s explicitely and decrease ->pc_buf size to 64 bytes.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 7ae662334835..0faae3098295 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -385,7 +385,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
         struct gendisk *disk = floppy->disk;
         struct ide_atapi_pc pc;
         u8 *cap_desc;
-        u8 header_len, desc_cnt;
+        u8 pc_buf[256], header_len, desc_cnt;
         int i, rc = 1, blocks, length;
 
         drive->bios_cyl = 0;
@@ -395,6 +395,9 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
         drive->capacity64 = 0;
 
         ide_floppy_create_read_capacity_cmd(&pc);
+        pc.buf = &pc_buf[0];
+        pc.buf_size = sizeof(pc_buf);
+
         if (ide_queue_pc_tail(drive, disk, &pc)) {
                 printk(KERN_ERR PFX "Can't get floppy parameters\n");
                 return 1;