ide-tape: fix potential fs requests bug

ide-tape had a potential bug for fs requests when preparing the command
packet: it was writing the transfer length as a number of fixed blocks.
However, the block layer implies 512 byte blocks and ide-tape can have
other block sizes so account for that too.

ide-floppy does this calculation properly with the block size factor
(floppy->bs_factor).

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>

diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index e166045..fc79cf4 100644 (file)
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -586,7 +586,7 @@ static void ide_tape_create_rw_cmd(idetape_tape_t *tape,
                                   struct ide_atapi_pc *pc, struct request *rq,
                                   u8 opcode)
 {
-       unsigned int length = blk_rq_sectors(rq);
+       unsigned int length = blk_rq_sectors(rq) / (tape->blk_size >> 9);
 
        ide_init_pc(pc);
        put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);