Georgios Toptsidis f7e7868b47 cdrom: Random writing support for BD-RE media ... Recently, i bought a blu-ray writer and noticed that while cdrecord worked perfectly, random writing didn't work on rewritable bd-re media. For example, dd if=/dev/zero of=/dev/sr0 bs=32768 count=2 gave the usual "read-only file system" message. After checking if the problem lies with my burner or firmware, i grep-ed the kernel source for EROFS. One of the results was in the cdrom driver. I tried to follow the function chain and ended in the cdrom_is_dvd_rw function where writing is permitted only for DVD-RAM and DVD+RW media. I added a new case label for 0x43 which is the profile name of BD-RE and now it works correctly for BD-RE too. Maybe there is a better way of implementing this, like a new function checking for blu-ray support and called from cdrom_open_write like it happens for mrw and dvdram media, but adding the case label worked. Thank you for your time. Signed-off-by: Jens Axboe <axboe@fb.com>		2015-09-25 09:07:57 -06:00
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cdrom.c	cdrom: Random writing support for BD-RE media	2015-09-25 09:07:57 -06:00
gdrom.c	gdrom: missed conversion from req->buffer	2014-04-16 14:15:24 -06:00
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