* [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
@ 2012-03-14 20:52 Sebastian Andrzej Siewior
2012-03-14 21:07 ` Greg Kroah-Hartman
2012-03-15 15:33 ` Pete Zaitcev
0 siblings, 2 replies; 13+ messages in thread
From: Sebastian Andrzej Siewior @ 2012-03-14 20:52 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: linux-usb, linux-kernel, Sebastian Andrzej Siewior, Pete Zaitcev,
Jens Axboe
Deprecate this driver. All devices which can be handled by this driver
can also be handled by the usb-storage driver.
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
---
Documentation/feature-removal-schedule.txt | 15 +++++++++++++++
drivers/block/Kconfig | 2 +-
drivers/block/ub.c | 2 ++
3 files changed, 18 insertions(+), 1 deletions(-)
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index a0ffac0..f534828 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -524,3 +524,18 @@ Files: arch/arm/mach-at91/at91cap9.c
Why: The code is not actively maintained and platforms are now hard to find.
Who: Nicolas Ferre <nicolas.ferre@atmel.com>
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+
+----------------------------
+
+What: Low Performance USB Block driver ("CONFIG_BLK_DEV_UB")
+When: 3.6
+Why: This driver provides support for USB storage devices like "USB
+ sticks". It translates the requests from the block layer into
+ READ & WRITE requests. It does not use the SCSI layer for device
+ handling and as results sdparm & smartmontool do not work. It
+ does not use libusual which holds various workarounds for
+ certain buggy devices.
+ As of now, it is deactivated in Debian, Fedora and Ubuntu. All
+ current users can switch over to usb-storage (CONFIG_USB_STORAGE)
+ which only drawback is the additional SCSI stack.
+Who: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index 4e4c8a4..a796407 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -354,7 +354,7 @@ config BLK_DEV_SX8
Use devices /dev/sx8/$N and /dev/sx8/$Np$M.
config BLK_DEV_UB
- tristate "Low Performance USB Block driver"
+ tristate "Low Performance USB Block driver (deprecated)"
depends on USB
help
This driver supports certain USB attached storage devices
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 298ac75..fcec022 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -2440,6 +2440,8 @@ static int __init ub_init(void)
int rc;
int i;
+ pr_info("'Low Performance USB Block' driver is deprecated. "
+ "Please switch to usb-storage\n");
for (i = 0; i < UB_QLOCK_NUM; i++)
spin_lock_init(&ub_qlockv[i]);
--
1.7.9.1
^ permalink raw reply related [flat|nested] 13+ messages in thread
* Re: [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-14 20:52 [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver Sebastian Andrzej Siewior
@ 2012-03-14 21:07 ` Greg Kroah-Hartman
2012-03-15 15:33 ` Pete Zaitcev
1 sibling, 0 replies; 13+ messages in thread
From: Greg Kroah-Hartman @ 2012-03-14 21:07 UTC (permalink / raw)
To: Sebastian Andrzej Siewior
Cc: linux-usb, linux-kernel, Pete Zaitcev, Jens Axboe
On Wed, Mar 14, 2012 at 09:52:51PM +0100, Sebastian Andrzej Siewior wrote:
> Deprecate this driver. All devices which can be handled by this driver
> can also be handled by the usb-storage driver.
>
> Cc: Pete Zaitcev <zaitcev@redhat.com>
I need an ack here from Pete before I can accept this.
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-14 20:52 [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver Sebastian Andrzej Siewior
2012-03-14 21:07 ` Greg Kroah-Hartman
@ 2012-03-15 15:33 ` Pete Zaitcev
2012-03-15 15:37 ` Greg Kroah-Hartman
2012-03-15 17:57 ` [PATCH] " Sebastian Andrzej Siewior
1 sibling, 2 replies; 13+ messages in thread
From: Pete Zaitcev @ 2012-03-15 15:33 UTC (permalink / raw)
To: Sebastian Andrzej Siewior; +Cc: Greg Kroah-Hartman, linux-usb, linux-kernel
On Wed, 14 Mar 2012 21:52:51 +0100
Sebastian Andrzej Siewior <sebastian@breakpoint.cc> wrote:
> +What: Low Performance USB Block driver ("CONFIG_BLK_DEV_UB")
> +When: 3.6
ACK
> + does not use libusual which holds various workarounds for
> + certain buggy devices.
Although the above is false, and ub actually started libusual,
I don't mind. It's a transient notice anyway. Once ub is gone,
libusual can be folded back into usb-storage.
-- Pete
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-15 15:33 ` Pete Zaitcev
@ 2012-03-15 15:37 ` Greg Kroah-Hartman
2012-03-15 18:10 ` Sebastian Andrzej Siewior
2012-03-15 20:59 ` [PATCH v2] " Sebastian Andrzej Siewior
2012-03-15 17:57 ` [PATCH] " Sebastian Andrzej Siewior
1 sibling, 2 replies; 13+ messages in thread
From: Greg Kroah-Hartman @ 2012-03-15 15:37 UTC (permalink / raw)
To: Pete Zaitcev; +Cc: Sebastian Andrzej Siewior, linux-usb, linux-kernel
On Thu, Mar 15, 2012 at 09:33:31AM -0600, Pete Zaitcev wrote:
> On Wed, 14 Mar 2012 21:52:51 +0100
> Sebastian Andrzej Siewior <sebastian@breakpoint.cc> wrote:
>
> > +What: Low Performance USB Block driver ("CONFIG_BLK_DEV_UB")
> > +When: 3.6
>
> ACK
>
> > + does not use libusual which holds various workarounds for
> > + certain buggy devices.
>
> Although the above is false, and ub actually started libusual,
> I don't mind. It's a transient notice anyway. Once ub is gone,
> libusual can be folded back into usb-storage.
Good point.
Sebastian, care to reword this and resend it?
Also, are you going to be doing the "merge libusual into usb-storage"
after you remove the ub driver?
thanks,
greg k-h
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-15 15:33 ` Pete Zaitcev
2012-03-15 15:37 ` Greg Kroah-Hartman
@ 2012-03-15 17:57 ` Sebastian Andrzej Siewior
2012-03-15 20:03 ` Alan Stern
1 sibling, 1 reply; 13+ messages in thread
From: Sebastian Andrzej Siewior @ 2012-03-15 17:57 UTC (permalink / raw)
To: Pete Zaitcev; +Cc: Greg Kroah-Hartman, linux-usb, linux-kernel
On Thu, Mar 15, 2012 at 09:33:31AM -0600, Pete Zaitcev wrote:
> On Wed, 14 Mar 2012 21:52:51 +0100
> Sebastian Andrzej Siewior <sebastian@breakpoint.cc> wrote:
>
> > +What: Low Performance USB Block driver ("CONFIG_BLK_DEV_UB")
> > +When: 3.6
>
> ACK
>
> > + does not use libusual which holds various workarounds for
> > + certain buggy devices.
>
> Although the above is false, and ub actually started libusual,
> I don't mind. It's a transient notice anyway. Once ub is gone,
> libusual can be folded back into usb-storage.
There might be an miss understanding here. For instance in
drivers/usb/storage/unusual_devs.h we have an entry like:
|UNUSUAL_DEV( 0x03f0, 0x4002, 0x0001, 0x0001,
| "HP",
| "PhotoSmart R707",
| USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_FIX_CAPACITY),
|
That US_FL_FIX_CAPACITY is used later in scsiglue.c to set sdev->fix_capacity
which is then used by sd_read_capacity() to substract one sector from the
final size.
In ub I see ub_sync_read_cap() and I don't see a change. Was my wording wrong
or is this something else?
> -- Pete
Sebastian
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-15 15:37 ` Greg Kroah-Hartman
@ 2012-03-15 18:10 ` Sebastian Andrzej Siewior
2012-03-15 18:56 ` Greg Kroah-Hartman
2012-03-15 20:59 ` [PATCH v2] " Sebastian Andrzej Siewior
1 sibling, 1 reply; 13+ messages in thread
From: Sebastian Andrzej Siewior @ 2012-03-15 18:10 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Pete Zaitcev, linux-usb, linux-kernel
> > Although the above is false, and ub actually started libusual,
> > I don't mind. It's a transient notice anyway. Once ub is gone,
> > libusual can be folded back into usb-storage.
>
> Good point.
>
> Sebastian, care to reword this and resend it?
I want clarify one thing but sure.
> Also, are you going to be doing the "merge libusual into usb-storage"
> after you remove the ub driver?
This sounds like once ub is out, you have to merge those two :) So yes, unless
a use case for it comes up.
> thanks,
>
> greg k-h
Sebastian
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-15 18:10 ` Sebastian Andrzej Siewior
@ 2012-03-15 18:56 ` Greg Kroah-Hartman
2012-03-15 21:02 ` Sebastian Andrzej Siewior
0 siblings, 1 reply; 13+ messages in thread
From: Greg Kroah-Hartman @ 2012-03-15 18:56 UTC (permalink / raw)
To: Sebastian Andrzej Siewior; +Cc: Pete Zaitcev, linux-usb, linux-kernel
On Thu, Mar 15, 2012 at 07:10:45PM +0100, Sebastian Andrzej Siewior wrote:
> > > Although the above is false, and ub actually started libusual,
> > > I don't mind. It's a transient notice anyway. Once ub is gone,
> > > libusual can be folded back into usb-storage.
> >
> > Good point.
> >
> > Sebastian, care to reword this and resend it?
> I want clarify one thing but sure.
>
> > Also, are you going to be doing the "merge libusual into usb-storage"
> > after you remove the ub driver?
>
> This sounds like once ub is out, you have to merge those two :) So yes, unless
> a use case for it comes up.
I'll take patches from you to do this, as the removal patch of ub will
make libusual not need to be stand-alone.
And you will be the one sending the ub removal patch in 6 months, right?
thanks,
greg k-h
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-15 17:57 ` [PATCH] " Sebastian Andrzej Siewior
@ 2012-03-15 20:03 ` Alan Stern
2012-03-15 20:05 ` Sebastian Andrzej Siewior
0 siblings, 1 reply; 13+ messages in thread
From: Alan Stern @ 2012-03-15 20:03 UTC (permalink / raw)
To: Sebastian Andrzej Siewior
Cc: Pete Zaitcev, Greg Kroah-Hartman, linux-usb, linux-kernel
On Thu, 15 Mar 2012, Sebastian Andrzej Siewior wrote:
> On Thu, Mar 15, 2012 at 09:33:31AM -0600, Pete Zaitcev wrote:
> > On Wed, 14 Mar 2012 21:52:51 +0100
> > Sebastian Andrzej Siewior <sebastian@breakpoint.cc> wrote:
> >
> > > +What: Low Performance USB Block driver ("CONFIG_BLK_DEV_UB")
> > > +When: 3.6
> >
> > ACK
> >
> > > + does not use libusual which holds various workarounds for
> > > + certain buggy devices.
> >
> > Although the above is false, and ub actually started libusual,
> > I don't mind. It's a transient notice anyway. Once ub is gone,
> > libusual can be folded back into usb-storage.
>
> There might be an miss understanding here. For instance in
> drivers/usb/storage/unusual_devs.h we have an entry like:
>
> |UNUSUAL_DEV( 0x03f0, 0x4002, 0x0001, 0x0001,
> | "HP",
> | "PhotoSmart R707",
> | USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_FIX_CAPACITY),
> |
>
> That US_FL_FIX_CAPACITY is used later in scsiglue.c to set sdev->fix_capacity
> which is then used by sd_read_capacity() to substract one sector from the
> final size.
> In ub I see ub_sync_read_cap() and I don't see a change. Was my wording wrong
> or is this something else?
Pete wasn't talking about the phrase "holds various workarounds...".
Rather, he was referring to the phrase "does not use libusual". That
part is wrong; ub _does_ use libusual.
Alan Stern
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-15 20:03 ` Alan Stern
@ 2012-03-15 20:05 ` Sebastian Andrzej Siewior
2012-03-16 2:02 ` Alan Stern
0 siblings, 1 reply; 13+ messages in thread
From: Sebastian Andrzej Siewior @ 2012-03-15 20:05 UTC (permalink / raw)
To: Alan Stern; +Cc: Pete Zaitcev, Greg Kroah-Hartman, linux-usb, linux-kernel
On Thu, Mar 15, 2012 at 04:03:02PM -0400, Alan Stern wrote:
> Pete wasn't talking about the phrase "holds various workarounds...".
> Rather, he was referring to the phrase "does not use libusual". That
> part is wrong; ub _does_ use libusual.
Okay, so I mixed up those two. "does not use libunsual" would be the correct
thing to day, right?
> Alan Stern
Sebastian
^ permalink raw reply [flat|nested] 13+ messages in thread
* [PATCH v2] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-15 15:37 ` Greg Kroah-Hartman
2012-03-15 18:10 ` Sebastian Andrzej Siewior
@ 2012-03-15 20:59 ` Sebastian Andrzej Siewior
2012-03-15 21:43 ` Pete Zaitcev
1 sibling, 1 reply; 13+ messages in thread
From: Sebastian Andrzej Siewior @ 2012-03-15 20:59 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Pete Zaitcev, linux-usb, linux-kernel
Deprecate this driver. All devices which can be handled by this driver
can also be handled by the usb-storage driver.
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
---
v1..v2: remove "can't use SCSI commands" and "does not use libusual". I meant
libunusual but it probably does not matter.
Documentation/feature-removal-schedule.txt | 11 +++++++++++
drivers/block/Kconfig | 2 +-
drivers/block/ub.c | 2 ++
3 files changed, 14 insertions(+), 1 deletions(-)
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index a0ffac0..d5dc80f 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -524,3 +524,14 @@ Files: arch/arm/mach-at91/at91cap9.c
Why: The code is not actively maintained and platforms are now hard to find.
Who: Nicolas Ferre <nicolas.ferre@atmel.com>
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+
+----------------------------
+
+What: Low Performance USB Block driver ("CONFIG_BLK_DEV_UB")
+When: 3.6
+Why: This driver provides support for USB storage devices like "USB
+ sticks". As of now, it is deactivated in Debian, Fedora and
+ Ubuntu. All current users can switch over to usb-storage
+ (CONFIG_USB_STORAGE) which only drawback is the additional SCSI
+ stack.
+Who: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index 4e4c8a4..a796407 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -354,7 +354,7 @@ config BLK_DEV_SX8
Use devices /dev/sx8/$N and /dev/sx8/$Np$M.
config BLK_DEV_UB
- tristate "Low Performance USB Block driver"
+ tristate "Low Performance USB Block driver (deprecated)"
depends on USB
help
This driver supports certain USB attached storage devices
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 298ac75..fcec022 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -2440,6 +2440,8 @@ static int __init ub_init(void)
int rc;
int i;
+ pr_info("'Low Performance USB Block' driver is deprecated. "
+ "Please switch to usb-storage\n");
for (i = 0; i < UB_QLOCK_NUM; i++)
spin_lock_init(&ub_qlockv[i]);
--
1.7.9.1
^ permalink raw reply related [flat|nested] 13+ messages in thread
* Re: [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-15 18:56 ` Greg Kroah-Hartman
@ 2012-03-15 21:02 ` Sebastian Andrzej Siewior
0 siblings, 0 replies; 13+ messages in thread
From: Sebastian Andrzej Siewior @ 2012-03-15 21:02 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Pete Zaitcev, linux-usb, linux-kernel
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
On > I'll take patches from you to do this, as the removal patch of ub will
> make libusual not need to be stand-alone.
Okay.
> And you will be the one sending the ub removal patch in 6 months, right?
Linus should release 3.3 this weekend. The removal is scheduled for 3.6 which
means 3 releases so something between 3 * 2 .. 3 * 3 months depending how
long each release will take.
>
> thanks,
>
> greg k-h
Sebastian
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^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH v2] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-15 20:59 ` [PATCH v2] " Sebastian Andrzej Siewior
@ 2012-03-15 21:43 ` Pete Zaitcev
0 siblings, 0 replies; 13+ messages in thread
From: Pete Zaitcev @ 2012-03-15 21:43 UTC (permalink / raw)
To: Sebastian Andrzej Siewior; +Cc: Greg Kroah-Hartman, linux-usb, linux-kernel
On Thu, 15 Mar 2012 21:59:36 +0100
Sebastian Andrzej Siewior <sebastian@breakpoint.cc> wrote:
> +What: Low Performance USB Block driver ("CONFIG_BLK_DEV_UB")
> +When: 3.6
> +Why: This driver provides support for USB storage devices like "USB
> + sticks". As of now, it is deactivated in Debian, Fedora and
> + Ubuntu. All current users can switch over to usb-storage
> + (CONFIG_USB_STORAGE) which only drawback is the additional SCSI
> + stack.
> +Who: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Acked-By: Pete Zaitcev <zaitcev@redhat.com>
-- Pete
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
2012-03-15 20:05 ` Sebastian Andrzej Siewior
@ 2012-03-16 2:02 ` Alan Stern
0 siblings, 0 replies; 13+ messages in thread
From: Alan Stern @ 2012-03-16 2:02 UTC (permalink / raw)
To: Sebastian Andrzej Siewior
Cc: Pete Zaitcev, Greg Kroah-Hartman, linux-usb, linux-kernel
On Thu, 15 Mar 2012, Sebastian Andrzej Siewior wrote:
> On Thu, Mar 15, 2012 at 04:03:02PM -0400, Alan Stern wrote:
> > Pete wasn't talking about the phrase "holds various workarounds...".
> > Rather, he was referring to the phrase "does not use libusual". That
> > part is wrong; ub _does_ use libusual.
>
> Okay, so I mixed up those two. "does not use libunsual" would be the correct
> thing to day, right?
Mixed up what two? What is libunusual? I have never heard of it.
Alan Stern
^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2012-03-16 2:02 UTC | newest]
Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-03-14 20:52 [PATCH] usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver Sebastian Andrzej Siewior
2012-03-14 21:07 ` Greg Kroah-Hartman
2012-03-15 15:33 ` Pete Zaitcev
2012-03-15 15:37 ` Greg Kroah-Hartman
2012-03-15 18:10 ` Sebastian Andrzej Siewior
2012-03-15 18:56 ` Greg Kroah-Hartman
2012-03-15 21:02 ` Sebastian Andrzej Siewior
2012-03-15 20:59 ` [PATCH v2] " Sebastian Andrzej Siewior
2012-03-15 21:43 ` Pete Zaitcev
2012-03-15 17:57 ` [PATCH] " Sebastian Andrzej Siewior
2012-03-15 20:03 ` Alan Stern
2012-03-15 20:05 ` Sebastian Andrzej Siewior
2012-03-16 2:02 ` Alan Stern
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