On Fri, Nov 6, 2015 at 4:22 AM, Vishnu Pratap Singh <vishnu.ps@xxxxxxxxxxx> wrote: > This patch handles blk_register_region() return value. > Earlier blk_register_region() function doesn't handle error > cases, now it is added, so the callers of this function > should also handle it. > > Verfied on X86 based ubuntu machine. > This patch depends on [PATCH 1/8] block/genhd.c: Add error handling > > Signed-off-by: Vishnu Pratap Singh <vishnu.ps@xxxxxxxxxxx> > --- > drivers/block/floppy.c | 11 +++++++---- > 1 file changed, 7 insertions(+), 4 deletions(-) > > diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c > index 331363e..50802a6 100644 > --- a/drivers/block/floppy.c > +++ b/drivers/block/floppy.c > @@ -4219,8 +4219,10 @@ static int __init do_floppy_init(void) > if (err) > goto out_unreg_blkdev; > > - blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, > + err = blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, > floppy_find, NULL, NULL); > + if (err) > + goto out_unreg_region; > > for (i = 0; i < 256; i++) > if (ITYPE(i)) > @@ -4250,7 +4252,7 @@ static int __init do_floppy_init(void) > if (fdc_state[0].address == -1) { > cancel_delayed_work(&fd_timeout); > err = -ENODEV; > - goto out_unreg_region; > + goto out_fdc_err; > } > #if N_FDC > 1 > fdc_state[1].address = FDC2; > @@ -4261,7 +4263,7 @@ static int __init do_floppy_init(void) > if (err) { > cancel_delayed_work(&fd_timeout); > err = -EBUSY; > - goto out_unreg_region; > + goto out_fdc_region; Please drop this hunk. > } > > /* initialise drive state */ > @@ -4357,8 +4359,9 @@ out_remove_drives: > out_release_dma: > if (atomic_read(&usage_count)) > floppy_release_irq_and_dma(); > -out_unreg_region: > +out_fdc_err: > blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); > +out_unreg_region: Nit: out_unreg_region should continue to be a label for the unregister_region call. My preference would be to add a new label here so something like "goto out_driver_unregister" works. I normally would ignore this sort of thing but this patch needs to be reposted as V2 anyway. cheers, grant > platform_driver_unregister(&floppy_driver); > out_unreg_blkdev: > unregister_blkdev(FLOPPY_MAJOR, "fd"); > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html