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SubjectRe: [PATCH] cdrom sane fallback vs 2.4.20-pre1
On Mon, Aug 12 2002, Marcelo Tosatti wrote:
>
>
> On Sun, 11 Aug 2002, Erik Andersen wrote:
>
> > --- drivers/cdrom/cdrom.c~ Sun Aug 11 15:37:20 2002
> > +++ drivers/cdrom/cdrom.c Sun Aug 11 15:37:24 2002
> > @@ -1916,6 +1916,7 @@
> > {
> > struct cdrom_device_ops *cdo = cdi->ops;
> > struct cdrom_generic_command cgc;
> > + struct request_sense sense;
> > kdev_t dev = cdi->dev;
> > char buffer[32];
> > int ret = 0;
> > @@ -1951,9 +1952,11 @@
> > cgc.buffer = (char *) kmalloc(blocksize, GFP_KERNEL);
> > if (cgc.buffer == NULL)
> > return -ENOMEM;
> > + memset(&sense, 0, sizeof(sense));
> > + cgc.sense = &sense;
> > cgc.data_direction = CGC_DATA_READ;
> > ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize);
> > - if (ret) {
> > + if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) {
>
> Do you really need to hardcode this values ?

the values above are well known to anyone familiar with atapi and/or
scsi, so it's not a worry. the patch looks good to me, I can recommend
it for inclusion.

--
Jens Axboe

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