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block/floppy: Convert callback to pass timer_list 

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to passing in the timer pointer explicitly.
Calculate the drive from the offset of the timer in the timer list.

Cc: Jiri Kosina <jikos@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Ming Lei <tom.leiming@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Geliang Tang <geliangtang@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Kees Cook 2017-10-04 17:49:29 -07:00 committed by Jens Axboe
parent 37cb8e1f8e
commit b1bf42105a
1 changed files with 7 additions and 3 deletions
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10
drivers/block/floppy.c
View File

@ -903,10 +903,14 @@ static void unlock_fdc(void)
}
/* switches the motor off after a given timeout */
static void motor_off_callback(unsigned long nr)
static void motor_off_callback(struct timer_list *t)
{
unsigned long nr = t - motor_off_timer;
unsigned char mask = ~(0x10 << UNIT(nr));
if (WARN_ON_ONCE(nr >= N_DRIVE))
return;
set_dor(FDC(nr), mask, 0);
}
@ -3047,7 +3051,7 @@ static void raw_cmd_done(int flag)
else
raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
motor_off_callback(current_drive);
motor_off_callback(&motor_off_timer[current_drive]);
if (raw_cmd->next &&
(!(raw_cmd->flags & FD_RAW_FAILURE) ||
@ -4542,7 +4546,7 @@ static int __init do_floppy_init(void)
disks[drive]->fops = &floppy_fops;
sprintf(disks[drive]->disk_name, "fd%d", drive);
setup_timer(&motor_off_timer[drive], motor_off_callback, drive);
timer_setup(&motor_off_timer[drive], motor_off_callback, 0);
}
err = register_blkdev(FLOPPY_MAJOR, "fd");