Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1311271
| Path | csiph.com!feeder.erje.net!2.eu.feeder.erje.net!newsfeed.datemas.de!weretis.net!feeder4.news.weretis.net!storethat.news.telefonica.de!telefonica.de!news.panservice.it!bofh.it!news.nic.it!robomod |
|---|---|
| From | Ben Hutchings <ben@decadent.org.uk> |
| Newsgroups | linux.kernel |
| Subject | [PATCH 3.2 69/70] cdrom: Random writing support for BD-RE media |
| Date | Mon, 18 Jan 2016 04:40:03 +0100 |
| Message-ID | <qS8PF-3ml-29@gated-at.bofh.it> (permalink) |
| References | <qS8FX-3hu-3@gated-at.bofh.it> |
| X-Original-To | linux-kernel@vger.kernel.org, stable@vger.kernel.org |
| Content-Type | text/plain; charset="UTF-8" |
| Content-Disposition | inline |
| Content-Transfer-Encoding | 8bit |
| MIME-Version | 1.0 |
| X-Mailer | LinuxStableQueue (scripts by bwh) |
| X-Sa-Exim-Connect-IP | 192.168.4.247 |
| X-Sa-Exim-Mail-From | ben@decadent.org.uk |
| X-Sa-Exim-Scanned | No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false |
| Sender | robomod@news.nic.it |
| List-ID | <linux-kernel.vger.kernel.org> |
| X-Mailing-List | linux-kernel@vger.kernel.org |
| Approved | robomod@news.nic.it |
| Lines | 43 |
| Organization | linux.* mail to news gateway |
| X-Original-Cc | akpm@linux-foundation.org, "Jens Axboe" <axboe@fb.com>, "Georgios Toptsidis" <gtoptsid@gmail.com> |
| X-Original-Date | Mon, 18 Jan 2016 03:18:35 +0000 |
| X-Original-Message-ID | <lsq.1453087115.868892992@decadent.org.uk> |
| X-Original-References | <lsq.1453087114.713093519@decadent.org.uk> |
| X-Original-Sender | linux-kernel-owner@vger.kernel.org |
| Xref | csiph.com linux.kernel:1311271 |
Show key headers only | View raw
3.2.76-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Georgios Toptsidis <gtoptsid@gmail.com>
commit f7e7868b4743f1cc5e59e6e0ddd3ccf9cfe53a1b upstream.
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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/cdrom/cdrom.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -873,6 +873,7 @@ static int cdrom_is_dvd_rw(struct cdrom_
switch (cdi->mmc3_profile) {
case 0x12: /* DVD-RAM */
case 0x1A: /* DVD+RW */
+ case 0x43: /* BD-RE */
return 0;
default:
return 1;
Back to linux.kernel | Previous | Next | Find similar | Unroll thread
[PATCH 3.2 69/70] cdrom: Random writing support for BD-RE media Ben Hutchings <ben@decadent.org.uk> - 2016-01-18 04:40 +0100
csiph-web