[PATCH] block: Needn't read the size of device or partition again

[PATCH] block: Needn't read the size of device or partition again

[taco]

It is not necessary to invoke i_size_read to get the size of device or
partition again, due to did it before.i_size_read maybe need to abtain
lock or disable preempt.

Signed-off-by: taco <tacoee@gmail.com>
---
 block/blk-core.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index ea70e6c..3aa3fc3 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1423,7 +1423,7 @@ static inline void blk_partition_remap(struct bio *bio)
 	}
 }
 
-static void handle_bad_sector(struct bio *bio)
+static void handle_bad_sector(struct bio *bio, sector_t maxsector)
 {
 	char b[BDEVNAME_SIZE];
 
@@ -1432,7 +1432,7 @@ static void handle_bad_sector(struct bio *bio)
 			bdevname(bio->bi_bdev, b),
 			bio->bi_rw,
 			(unsigned long long)bio->bi_sector + bio_sectors(bio),
-			(long long)(i_size_read(bio->bi_bdev->bd_inode) >> 9));
+			(long long)maxsector);
 
 	set_bit(BIO_EOF, &bio->bi_flags);
 }
@@ -1493,7 +1493,7 @@ static inline int bio_check_eod(struct bio *bio, unsigned int nr_sectors)
 			 * without checking the size of the device, e.g., when
 			 * mounting a device.
 			 */
-			handle_bad_sector(bio);
+			handle_bad_sector(bio, maxsector);
 			return 1;
 		}
 	}
-- 
1.7.5.4

[PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

[Sanjeev Sharma]

on some architecture spin_is_locked() always return false in
uniprocessor configuration and therefore it would be advise
to replace with lockdep_assert_held().

Signed-off-by: Sanjeev Sharma <Sanjeev_Sharma-nmGgyN9QBj3QT0dZR+AlfA@public.gmane.org>
---
Changes in v3:
 incorporated review comment suggested by Greg

 drivers/usb/storage/uas.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 3f42785..05b2d8e 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -154,7 +154,7 @@ static void uas_mark_cmd_dead(struct uas_dev_info *devinfo,
 	struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
 
 	uas_log_cmd_state(cmnd, caller);
-	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
+	lockdep_assert_held(&devinfo->lock);
 	WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED);
 	cmdinfo->state |= COMMAND_ABORTED;
 	cmdinfo->state &= ~IS_IN_WORK_LIST;
@@ -181,7 +181,7 @@ static void uas_add_work(struct uas_cmd_info *cmdinfo)
 	struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
 	struct uas_dev_info *devinfo = cmnd->device->hostdata;
 
-	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
+	lockdep_assert_held(&devinfo->lock);
 	cmdinfo->state |= IS_IN_WORK_LIST;
 	schedule_work(&devinfo->work);
 }
@@ -283,7 +283,7 @@ static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller)
 	struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
 	struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
 
-	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
+	lockdep_assert_held(&devinfo->lock);
 	if (cmdinfo->state & (COMMAND_INFLIGHT |
 			      DATA_IN_URB_INFLIGHT |
 			      DATA_OUT_URB_INFLIGHT |
@@ -622,7 +622,7 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
 	struct urb *urb;
 	int err;
 
-	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
+	lockdep_assert_held(&devinfo->lock);
 	if (cmdinfo->state & SUBMIT_STATUS_URB) {
 		urb = uas_submit_sense_urb(cmnd, gfp, cmdinfo->stream);
 		if (!urb)
-- 
1.7.11.7

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Re: [PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

[Hans de Goede]

Hi,

On 08/12/2014 08:40 AM, Sanjeev Sharma wrote:
> on some architecture spin_is_locked() always return false in
> uniprocessor configuration and therefore it would be advise
> to replace with lockdep_assert_held().
> 
> Signed-off-by: Sanjeev Sharma <Sanjeev_Sharma@mentor.com>
> ---
> Changes in v3:
>  incorporated review comment suggested by Greg

Thanks, this is still:

Acked-by: Hans de Goede <hdegoede@redhat.com>

Regards,

Hans

> 
>  drivers/usb/storage/uas.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
> index 3f42785..05b2d8e 100644
> --- a/drivers/usb/storage/uas.c
> +++ b/drivers/usb/storage/uas.c
> @@ -154,7 +154,7 @@ static void uas_mark_cmd_dead(struct uas_dev_info *devinfo,
>  	struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
>  
>  	uas_log_cmd_state(cmnd, caller);
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED);
>  	cmdinfo->state |= COMMAND_ABORTED;
>  	cmdinfo->state &= ~IS_IN_WORK_LIST;
> @@ -181,7 +181,7 @@ static void uas_add_work(struct uas_cmd_info *cmdinfo)
>  	struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
>  	struct uas_dev_info *devinfo = cmnd->device->hostdata;
>  
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	cmdinfo->state |= IS_IN_WORK_LIST;
>  	schedule_work(&devinfo->work);
>  }
> @@ -283,7 +283,7 @@ static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller)
>  	struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
>  	struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
>  
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	if (cmdinfo->state & (COMMAND_INFLIGHT |
>  			      DATA_IN_URB_INFLIGHT |
>  			      DATA_OUT_URB_INFLIGHT |
> @@ -622,7 +622,7 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
>  	struct urb *urb;
>  	int err;
>  
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	if (cmdinfo->state & SUBMIT_STATUS_URB) {
>  		urb = uas_submit_sense_urb(cmnd, gfp, cmdinfo->stream);
>  		if (!urb)
> 

RE: [PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

[Sharma, Sanjeev]

Yes I have incorporated review comment from Greg.

Regards
Sanjeev Sharma

-----Original Message-----
From: Hans de Goede [mailto:hdegoede@redhat.com] 
Sent: Tuesday, August 12, 2014 11:59 AM
To: Sharma, Sanjeev
Cc: gregkh@linuxfoundation.org; kraxel@redhat.com; mdharm-usb@one-eyed-alien.net; linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org; linux-scsi@vger.kernel.org
Subject: Re: [PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

Hi,

On 08/12/2014 08:40 AM, Sanjeev Sharma wrote:
> on some architecture spin_is_locked() always return false in 
> uniprocessor configuration and therefore it would be advise to replace 
> with lockdep_assert_held().
> 
> Signed-off-by: Sanjeev Sharma <Sanjeev_Sharma@mentor.com>
> ---
> Changes in v3:
>  incorporated review comment suggested by Greg

Thanks, this is still:

Acked-by: Hans de Goede <hdegoede@redhat.com>

Regards,

Hans

> 
>  drivers/usb/storage/uas.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c 
> index 3f42785..05b2d8e 100644
> --- a/drivers/usb/storage/uas.c
> +++ b/drivers/usb/storage/uas.c
> @@ -154,7 +154,7 @@ static void uas_mark_cmd_dead(struct uas_dev_info *devinfo,
>  	struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
>  
>  	uas_log_cmd_state(cmnd, caller);
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED);
>  	cmdinfo->state |= COMMAND_ABORTED;
>  	cmdinfo->state &= ~IS_IN_WORK_LIST;
> @@ -181,7 +181,7 @@ static void uas_add_work(struct uas_cmd_info *cmdinfo)
>  	struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
>  	struct uas_dev_info *devinfo = cmnd->device->hostdata;
>  
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	cmdinfo->state |= IS_IN_WORK_LIST;
>  	schedule_work(&devinfo->work);
>  }
> @@ -283,7 +283,7 @@ static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller)
>  	struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
>  	struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
>  
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	if (cmdinfo->state & (COMMAND_INFLIGHT |
>  			      DATA_IN_URB_INFLIGHT |
>  			      DATA_OUT_URB_INFLIGHT |
> @@ -622,7 +622,7 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
>  	struct urb *urb;
>  	int err;
>  
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	if (cmdinfo->state & SUBMIT_STATUS_URB) {
>  		urb = uas_submit_sense_urb(cmnd, gfp, cmdinfo->stream);
>  		if (!urb)
> 

RE: [PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

[Sharma, Sanjeev]

Hi Greg,

Any feedback on this patch ?

Regards
Sanjeev Sharma

-----Original Message-----
From: Sharma, Sanjeev 
Sent: Tuesday, August 12, 2014 12:07 PM
To: 'Hans de Goede'
Cc: gregkh@linuxfoundation.org; kraxel@redhat.com; mdharm-usb@one-eyed-alien.net; linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org; linux-scsi@vger.kernel.org
Subject: RE: [PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

Yes I have incorporated review comment from Greg.

Regards
Sanjeev Sharma

-----Original Message-----
From: Hans de Goede [mailto:hdegoede@redhat.com]
Sent: Tuesday, August 12, 2014 11:59 AM
To: Sharma, Sanjeev
Cc: gregkh@linuxfoundation.org; kraxel@redhat.com; mdharm-usb@one-eyed-alien.net; linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org; linux-scsi@vger.kernel.org
Subject: Re: [PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

Hi,

On 08/12/2014 08:40 AM, Sanjeev Sharma wrote:
> on some architecture spin_is_locked() always return false in 
> uniprocessor configuration and therefore it would be advise to replace 
> with lockdep_assert_held().
> 
> Signed-off-by: Sanjeev Sharma <Sanjeev_Sharma@mentor.com>
> ---
> Changes in v3:
>  incorporated review comment suggested by Greg

Thanks, this is still:

Acked-by: Hans de Goede <hdegoede@redhat.com>

Regards,

Hans

> 
>  drivers/usb/storage/uas.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c 
> index 3f42785..05b2d8e 100644
> --- a/drivers/usb/storage/uas.c
> +++ b/drivers/usb/storage/uas.c
> @@ -154,7 +154,7 @@ static void uas_mark_cmd_dead(struct uas_dev_info *devinfo,
>  	struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
>  
>  	uas_log_cmd_state(cmnd, caller);
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED);
>  	cmdinfo->state |= COMMAND_ABORTED;
>  	cmdinfo->state &= ~IS_IN_WORK_LIST;
> @@ -181,7 +181,7 @@ static void uas_add_work(struct uas_cmd_info *cmdinfo)
>  	struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
>  	struct uas_dev_info *devinfo = cmnd->device->hostdata;
>  
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	cmdinfo->state |= IS_IN_WORK_LIST;
>  	schedule_work(&devinfo->work);
>  }
> @@ -283,7 +283,7 @@ static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller)
>  	struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
>  	struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
>  
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	if (cmdinfo->state & (COMMAND_INFLIGHT |
>  			      DATA_IN_URB_INFLIGHT |
>  			      DATA_OUT_URB_INFLIGHT |
> @@ -622,7 +622,7 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
>  	struct urb *urb;
>  	int err;
>  
> -	WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> +	lockdep_assert_held(&devinfo->lock);
>  	if (cmdinfo->state & SUBMIT_STATUS_URB) {
>  		urb = uas_submit_sense_urb(cmnd, gfp, cmdinfo->stream);
>  		if (!urb)
> 

Re: [PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

[gregkh]

On Tue, Aug 19, 2014 at 06:33:04AM +0000, Sharma, Sanjeev wrote:
> Hi Greg,
> 
> Any feedback on this patch ?

The merge window ended 2 days ago, _and_ I'm at the kernel summit this
week, _and_ my queue is currently sitting at:
	$ mdfrm -c ~/mail/todo/
	1317 messages in /home/gregkh/mail/todo/

So please be patient.  I'll get to it in a few weeks.

greg k-h

RE: [PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

[Sharma, Sanjeev]

Thanks for letting me know.

Sanjeev Sharma

-----Original Message-----
From: gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org [mailto:gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org] 
Sent: Tuesday, August 19, 2014 3:01 PM
To: Sharma, Sanjeev
Cc: kraxel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org; mdharm-usb-JGfshJpz5UybPZpvUQj5UqxOck334EZe@public.gmane.org; linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; Hans de Goede
Subject: Re: [PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

On Tue, Aug 19, 2014 at 06:33:04AM +0000, Sharma, Sanjeev wrote:
> Hi Greg,
> 
> Any feedback on this patch ?

The merge window ended 2 days ago, _and_ I'm at the kernel summit this week, _and_ my queue is currently sitting at:
	$ mdfrm -c ~/mail/todo/
	1317 messages in /home/gregkh/mail/todo/

So please be patient.  I'll get to it in a few weeks.

greg k-h
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RE: [PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

[Sharma, Sanjeev]

-----Original Message-----
From: gregkh@linuxfoundation.org [mailto:gregkh@linuxfoundation.org] 
Sent: Tuesday, August 19, 2014 3:01 PM
To: Sharma, Sanjeev
Cc: kraxel@redhat.com; mdharm-usb@one-eyed-alien.net; linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org; linux-scsi@vger.kernel.org; Hans de Goede
Subject: Re: [PATCH v3] uas: replace WARN_ON_ONCE() with lockdep_assert_held()

On Tue, Aug 19, 2014 at 06:33:04AM +0000, Sharma, Sanjeev wrote:
> Hi Greg,
> 
> Any feedback on this patch ?

The merge window ended 2 days ago, _and_ I'm at the kernel summit this week, _and_ my queue is currently sitting at:
	$ mdfrm -c ~/mail/todo/
	1317 messages in /home/gregkh/mail/todo/

So please be patient.  I'll get to it in a few weeks.

Please let me know when this is going to be merged ?

Thanks
Sanjeev

greg k-h