[PATCH] scsi_transport_fc: use 64-bit timestamps consistently

[PATCH] scsi_transport_fc: use 64-bit timestamps consistently

[Arnd Bergmann]

The get_seconds() helper returns an 'unsigned long' value, which can
overflow on 32-bit architectures. Since the interface we pass it into
already uses a 64-bit type, we can just use ktime_get_real_seconds()
instead.

While we generally prefer local timestamps in CLOCK_MONOTONIC format
(ktime_get_seconds), this keeps using the CLOCK_REALTIME version
in order to maintain compatibility with existing code.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/scsi/scsi_transport_fc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 1da3d71e9f61..bb6de88aa724 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -567,7 +567,7 @@ fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 
 	INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 				FC_NL_ASYNC_EVENT, len);
-	event->seconds = get_seconds();
+	event->seconds = ktime_get_real_seconds();
 	event->vendor_id = 0;
 	event->host_no = shost->host_no;
 	event->event_datalen = sizeof(u32);	/* bytes */
@@ -635,7 +635,7 @@ fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 
 	INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 				FC_NL_ASYNC_EVENT, len);
-	event->seconds = get_seconds();
+	event->seconds = ktime_get_real_seconds();
 	event->vendor_id = vendor_id;
 	event->host_no = shost->host_no;
 	event->event_datalen = data_len;	/* bytes */
-- 
2.9.0

Re: [PATCH] scsi_transport_fc: use 64-bit timestamps consistently

[Johannes Thumshirn]

Looks good,
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
-- 
Johannes Thumshirn                                          Storage
jthumshirn@suse.de                                +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
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HRB 21284 (AG Nürnberg)
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Re: [PATCH] scsi_transport_fc: use 64-bit timestamps consistently

[Tyrel Datwyler]

On 06/18/2018 08:29 AM, Arnd Bergmann wrote:
> The get_seconds() helper returns an 'unsigned long' value, which can
> overflow on 32-bit architectures. Since the interface we pass it into
> already uses a 64-bit type, we can just use ktime_get_real_seconds()
> instead.
> 
> While we generally prefer local timestamps in CLOCK_MONOTONIC format
> (ktime_get_seconds), this keeps using the CLOCK_REALTIME version
> in order to maintain compatibility with existing code.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---

Reviewed-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>

Re: [PATCH] scsi_transport_fc: use 64-bit timestamps consistently

[James Smart]

On 6/18/2018 8:29 AM, Arnd Bergmann wrote:
> The get_seconds() helper returns an 'unsigned long' value, which can
> overflow on 32-bit architectures. Since the interface we pass it into
> already uses a 64-bit type, we can just use ktime_get_real_seconds()
> instead.
> 
> While we generally prefer local timestamps in CLOCK_MONOTONIC format
> (ktime_get_seconds), this keeps using the CLOCK_REALTIME version
> in order to maintain compatibility with existing code.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>   drivers/scsi/scsi_transport_fc.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
> index 1da3d71e9f61..bb6de88aa724 100644
> --- a/drivers/scsi/scsi_transport_fc.c
> +++ b/drivers/scsi/scsi_transport_fc.c
> @@ -567,7 +567,7 @@ fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
>   
>   	INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
>   				FC_NL_ASYNC_EVENT, len);
> -	event->seconds = get_seconds();
> +	event->seconds = ktime_get_real_seconds();
>   	event->vendor_id = 0;
>   	event->host_no = shost->host_no;
>   	event->event_datalen = sizeof(u32);	/* bytes */
> @@ -635,7 +635,7 @@ fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
>   
>   	INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
>   				FC_NL_ASYNC_EVENT, len);
> -	event->seconds = get_seconds();
> +	event->seconds = ktime_get_real_seconds();
>   	event->vendor_id = vendor_id;
>   	event->host_no = shost->host_no;
>   	event->event_datalen = data_len;	/* bytes */
> 

looks good

Reviewed-by:  James Smart  <james.smart@broadcom.com>

Re: [PATCH] scsi_transport_fc: use 64-bit timestamps consistently

[Martin K. Petersen]

Arnd,

> The get_seconds() helper returns an 'unsigned long' value, which can
> overflow on 32-bit architectures. Since the interface we pass it into
> already uses a 64-bit type, we can just use ktime_get_real_seconds()
> instead.
>
> While we generally prefer local timestamps in CLOCK_MONOTONIC format
> (ktime_get_seconds), this keeps using the CLOCK_REALTIME version in
> order to maintain compatibility with existing code.

Applied to 4.19/scsi-queue, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering