[PATCH 1/2] scsi: qla2xxx: remove incorrect byte swap

[PATCH 1/2] scsi: qla2xxx: remove incorrect byte swap

[Arnd Bergmann]

cont_pkt->entry_type is an 8-bit field, so doing a 32-bit byteswap
on it will store incorrect data:

drivers/scsi/qla2xxx/qla_nvme.c: In function 'qla2x00_start_nvme_mq':
include/uapi/linux/byteorder/big_endian.h:32:26: error: large integer implicitly truncated to unsigned type [-Werror=overflow]
drivers/scsi/qla2xxx/qla_nvme.c:444:27: note: in expansion of macro 'cpu_to_le32'
    cont_pkt->entry_type = cpu_to_le32(CONTINUE_A64_TYPE);

This removes the erroneous cpu_to_le32().

Fixes: e84067d74301 ("scsi: qla2xxx: Add FC-NVMe F/W initialization and transport registration")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/scsi/qla2xxx/qla_nvme.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index 1da8fa8f641d..14e25e32e622 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -441,7 +441,7 @@ static int qla2x00_start_nvme_mq(srb_t *sp)
 				req->ring_ptr++;
 			}
 			cont_pkt = (cont_a64_entry_t *)req->ring_ptr;
-			cont_pkt->entry_type = cpu_to_le32(CONTINUE_A64_TYPE);
+			cont_pkt->entry_type = CONTINUE_A64_TYPE;
 
 			cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
 			avail_dsds = 5;
-- 
2.9.0

[PATCH 2/2] scsi: qla2xxx: avoid unused-function warning

[Arnd Bergmann]

When NVMe support is disabled, we get a couple of harmless warnings:

drivers/scsi/qla2xxx/qla_nvme.c:667:13: error: 'qla_nvme_unregister_remote_port' defined but not used [-Werror=unused-function]
drivers/scsi/qla2xxx/qla_nvme.c:634:13: error: 'qla_nvme_abort_all' defined but not used [-Werror=unused-function]
drivers/scsi/qla2xxx/qla_nvme.c:604:12: error: 'qla_nvme_wait_on_rport_del' defined but not used [-Werror=unused-function]

This replaces the preprocessor checks in the code with equivalent
compiler conditionals, which lets gcc drop the unused functions
without warning, and is nicer to read.

Fixes: e84067d74301 ("scsi: qla2xxx: Add FC-NVMe F/W initialization and transport registration")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/scsi/qla2xxx/Kconfig    |  1 +
 drivers/scsi/qla2xxx/qla_nvme.c | 20 ++++++++++++--------
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/scsi/qla2xxx/Kconfig b/drivers/scsi/qla2xxx/Kconfig
index de952935b5d2..036cc3f217b1 100644
--- a/drivers/scsi/qla2xxx/Kconfig
+++ b/drivers/scsi/qla2xxx/Kconfig
@@ -2,6 +2,7 @@ config SCSI_QLA_FC
 	tristate "QLogic QLA2XXX Fibre Channel Support"
 	depends on PCI && SCSI
 	depends on SCSI_FC_ATTRS
+	depends on NVME_FC || !NVME_FC
 	select FW_LOADER
 	select BTREE
 	---help---
diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index 14e25e32e622..9c18d754ac33 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -17,10 +17,12 @@ static void qla_nvme_unregister_remote_port(struct work_struct *);
 
 int qla_nvme_register_remote(scsi_qla_host_t *vha, fc_port_t *fcport)
 {
-#if (IS_ENABLED(CONFIG_NVME_FC))
 	struct nvme_rport *rport;
 	int ret;
 
+	if (!IS_ENABLED(CONFIG_NVME_FC))
+		return 0;
+
 	if (fcport->nvme_flag & NVME_FLAG_REGISTERED)
 		return 0;
 
@@ -78,7 +80,6 @@ int qla_nvme_register_remote(scsi_qla_host_t *vha, fc_port_t *fcport)
 	init_waitqueue_head(&fcport->nvme_waitQ);
 	rport->fcport = fcport;
 	list_add_tail(&rport->list, &vha->nvme_rport_list);
-#endif
 	return 0;
 }
 
@@ -666,11 +667,13 @@ static void qla_nvme_abort_all(fc_port_t *fcport)
 
 static void qla_nvme_unregister_remote_port(struct work_struct *work)
 {
-#if (IS_ENABLED(CONFIG_NVME_FC))
 	struct fc_port *fcport = container_of(work, struct fc_port,
 	    nvme_del_work);
 	struct nvme_rport *rport, *trport;
 
+	if (!IS_ENABLED(CONFIG_NVME_FC))
+		return;
+
 	list_for_each_entry_safe(rport, trport,
 	    &fcport->vha->nvme_rport_list, list) {
 		if (rport->fcport == fcport) {
@@ -680,16 +683,17 @@ static void qla_nvme_unregister_remote_port(struct work_struct *work)
 			    fcport->nvme_remote_port);
 		}
 	}
-#endif
 }
 
 void qla_nvme_delete(scsi_qla_host_t *vha)
 {
-#if (IS_ENABLED(CONFIG_NVME_FC))
 	struct nvme_rport *rport, *trport;
 	fc_port_t *fcport;
 	int nv_ret;
 
+	if (!IS_ENABLED(CONFIG_NVME_FC))
+		return;
+
 	list_for_each_entry_safe(rport, trport, &vha->nvme_rport_list, list) {
 		fcport = rport->fcport;
 
@@ -711,17 +715,18 @@ void qla_nvme_delete(scsi_qla_host_t *vha)
 			ql_log(ql_log_info, vha, 0x2115,
 			    "Unregister of localport failed\n");
 	}
-#endif
 }
 
 void qla_nvme_register_hba(scsi_qla_host_t *vha)
 {
-#if (IS_ENABLED(CONFIG_NVME_FC))
 	struct nvme_fc_port_template *tmpl;
 	struct qla_hw_data *ha;
 	struct nvme_fc_port_info pinfo;
 	int ret;
 
+	if (!IS_ENABLED(CONFIG_NVME_FC))
+		return;
+
 	ha = vha->hw;
 	tmpl = &qla_nvme_fc_transport;
 
@@ -752,5 +757,4 @@ void qla_nvme_register_hba(scsi_qla_host_t *vha)
 	atomic_set(&vha->nvme_ref_count, 1);
 	vha->nvme_local_port->private = vha;
 	init_waitqueue_head(&vha->nvme_waitQ);
-#endif
 }
-- 
2.9.0

Re: [PATCH 2/2] scsi: qla2xxx: avoid unused-function warning

[Madhani, Himanshu]

> On Jun 30, 2017, at 9:10 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> 
> When NVMe support is disabled, we get a couple of harmless warnings:
> 
> drivers/scsi/qla2xxx/qla_nvme.c:667:13: error: 'qla_nvme_unregister_remote_port' defined but not used [-Werror=unused-function]
> drivers/scsi/qla2xxx/qla_nvme.c:634:13: error: 'qla_nvme_abort_all' defined but not used [-Werror=unused-function]
> drivers/scsi/qla2xxx/qla_nvme.c:604:12: error: 'qla_nvme_wait_on_rport_del' defined but not used [-Werror=unused-function]
> 
> This replaces the preprocessor checks in the code with equivalent
> compiler conditionals, which lets gcc drop the unused functions
> without warning, and is nicer to read.
> 
> Fixes: e84067d74301 ("scsi: qla2xxx: Add FC-NVMe F/W initialization and transport registration")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
> drivers/scsi/qla2xxx/Kconfig    |  1 +
> drivers/scsi/qla2xxx/qla_nvme.c | 20 ++++++++++++--------
> 2 files changed, 13 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/scsi/qla2xxx/Kconfig b/drivers/scsi/qla2xxx/Kconfig
> index de952935b5d2..036cc3f217b1 100644
> --- a/drivers/scsi/qla2xxx/Kconfig
> +++ b/drivers/scsi/qla2xxx/Kconfig
> @@ -2,6 +2,7 @@ config SCSI_QLA_FC
> 	tristate "QLogic QLA2XXX Fibre Channel Support"
> 	depends on PCI && SCSI
> 	depends on SCSI_FC_ATTRS
> +	depends on NVME_FC || !NVME_FC
> 	select FW_LOADER
> 	select BTREE
> 	---help---
> diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
> index 14e25e32e622..9c18d754ac33 100644
> --- a/drivers/scsi/qla2xxx/qla_nvme.c
> +++ b/drivers/scsi/qla2xxx/qla_nvme.c
> @@ -17,10 +17,12 @@ static void qla_nvme_unregister_remote_port(struct work_struct *);
> 
> int qla_nvme_register_remote(scsi_qla_host_t *vha, fc_port_t *fcport)
> {
> -#if (IS_ENABLED(CONFIG_NVME_FC))
> 	struct nvme_rport *rport;
> 	int ret;
> 
> +	if (!IS_ENABLED(CONFIG_NVME_FC))
> +		return 0;
> +
> 	if (fcport->nvme_flag & NVME_FLAG_REGISTERED)
> 		return 0;
> 
> @@ -78,7 +80,6 @@ int qla_nvme_register_remote(scsi_qla_host_t *vha, fc_port_t *fcport)
> 	init_waitqueue_head(&fcport->nvme_waitQ);
> 	rport->fcport = fcport;
> 	list_add_tail(&rport->list, &vha->nvme_rport_list);
> -#endif
> 	return 0;
> }
> 
> @@ -666,11 +667,13 @@ static void qla_nvme_abort_all(fc_port_t *fcport)
> 
> static void qla_nvme_unregister_remote_port(struct work_struct *work)
> {
> -#if (IS_ENABLED(CONFIG_NVME_FC))
> 	struct fc_port *fcport = container_of(work, struct fc_port,
> 	    nvme_del_work);
> 	struct nvme_rport *rport, *trport;
> 
> +	if (!IS_ENABLED(CONFIG_NVME_FC))
> +		return;
> +
> 	list_for_each_entry_safe(rport, trport,
> 	    &fcport->vha->nvme_rport_list, list) {
> 		if (rport->fcport == fcport) {
> @@ -680,16 +683,17 @@ static void qla_nvme_unregister_remote_port(struct work_struct *work)
> 			    fcport->nvme_remote_port);
> 		}
> 	}
> -#endif
> }
> 
> void qla_nvme_delete(scsi_qla_host_t *vha)
> {
> -#if (IS_ENABLED(CONFIG_NVME_FC))
> 	struct nvme_rport *rport, *trport;
> 	fc_port_t *fcport;
> 	int nv_ret;
> 
> +	if (!IS_ENABLED(CONFIG_NVME_FC))
> +		return;
> +
> 	list_for_each_entry_safe(rport, trport, &vha->nvme_rport_list, list) {
> 		fcport = rport->fcport;
> 
> @@ -711,17 +715,18 @@ void qla_nvme_delete(scsi_qla_host_t *vha)
> 			ql_log(ql_log_info, vha, 0x2115,
> 			    "Unregister of localport failed\n");
> 	}
> -#endif
> }
> 
> void qla_nvme_register_hba(scsi_qla_host_t *vha)
> {
> -#if (IS_ENABLED(CONFIG_NVME_FC))
> 	struct nvme_fc_port_template *tmpl;
> 	struct qla_hw_data *ha;
> 	struct nvme_fc_port_info pinfo;
> 	int ret;
> 
> +	if (!IS_ENABLED(CONFIG_NVME_FC))
> +		return;
> +
> 	ha = vha->hw;
> 	tmpl = &qla_nvme_fc_transport;
> 
> @@ -752,5 +757,4 @@ void qla_nvme_register_hba(scsi_qla_host_t *vha)
> 	atomic_set(&vha->nvme_ref_count, 1);
> 	vha->nvme_local_port->private = vha;
> 	init_waitqueue_head(&vha->nvme_waitQ);
> -#endif
> }
> -- 
> 2.9.0
> 

Looks Good. 

Acked-By: Himanshu Madhani <himanshu.madhani@cavium.com>

Thanks,
- Himanshu

Re: [PATCH 2/2] scsi: qla2xxx: avoid unused-function warning

[Martin K. Petersen]

Arnd,

> When NVMe support is disabled, we get a couple of harmless warnings:
>
> drivers/scsi/qla2xxx/qla_nvme.c:667:13: error: 'qla_nvme_unregister_remote_port' defined but not used [-Werror=unused-function]
> drivers/scsi/qla2xxx/qla_nvme.c:634:13: error: 'qla_nvme_abort_all' defined but not used [-Werror=unused-function]
> drivers/scsi/qla2xxx/qla_nvme.c:604:12: error: 'qla_nvme_wait_on_rport_del' defined but not used [-Werror=unused-function]
>
> This replaces the preprocessor checks in the code with equivalent
> compiler conditionals, which lets gcc drop the unused functions
> without warning, and is nicer to read.

Applied to 4.13/scsi-queue.

-- 
Martin K. Petersen	Oracle Linux Engineering

Re: [PATCH 1/2] scsi: qla2xxx: remove incorrect byte swap

[James Bottomley]

On Fri, 2017-06-30 at 18:10 +0200, Arnd Bergmann wrote:
> cont_pkt->entry_type is an 8-bit field, so doing a 32-bit byteswap
> on it will store incorrect data:
> 
> drivers/scsi/qla2xxx/qla_nvme.c: In function 'qla2x00_start_nvme_mq':
> include/uapi/linux/byteorder/big_endian.h:32:26: error: large integer
> implicitly truncated to unsigned type [-Werror=overflow]
> drivers/scsi/qla2xxx/qla_nvme.c:444:27: note: in expansion of macro
> 'cpu_to_le32'
>     cont_pkt->entry_type = cpu_to_le32(CONTINUE_A64_TYPE);
> 
> This removes the erroneous cpu_to_le32().
> 
> Fixes: e84067d74301 ("scsi: qla2xxx: Add FC-NVMe F/W initialization
> and transport registration")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/scsi/qla2xxx/qla_nvme.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/qla2xxx/qla_nvme.c
> b/drivers/scsi/qla2xxx/qla_nvme.c
> index 1da8fa8f641d..14e25e32e622 100644
> --- a/drivers/scsi/qla2xxx/qla_nvme.c
> +++ b/drivers/scsi/qla2xxx/qla_nvme.c
> @@ -441,7 +441,7 @@ static int qla2x00_start_nvme_mq(srb_t *sp)
>  				req->ring_ptr++;
>  			}
>  			cont_pkt = (cont_a64_entry_t *)req-
> >ring_ptr;
> -			cont_pkt->entry_type =
> cpu_to_le32(CONTINUE_A64_TYPE);
> +			cont_pkt->entry_type = CONTINUE_A64_TYPE;
> 

We already have a patch proposed for this, but I think it may be wrong
(it's the same as yours, so yours may be wrong too) see the handling in
qla_iocb.c

James

Re: [PATCH 1/2] scsi: qla2xxx: remove incorrect byte swap

[Madhani, Himanshu]

> On Jun 30, 2017, at 9:41 AM, James Bottomley <jejb@linux.vnet.ibm.com> wrote:
> 
> On Fri, 2017-06-30 at 18:10 +0200, Arnd Bergmann wrote:
>> cont_pkt->entry_type is an 8-bit field, so doing a 32-bit byteswap
>> on it will store incorrect data:
>> 
>> drivers/scsi/qla2xxx/qla_nvme.c: In function 'qla2x00_start_nvme_mq':
>> include/uapi/linux/byteorder/big_endian.h:32:26: error: large integer
>> implicitly truncated to unsigned type [-Werror=overflow]
>> drivers/scsi/qla2xxx/qla_nvme.c:444:27: note: in expansion of macro
>> 'cpu_to_le32'
>>     cont_pkt->entry_type = cpu_to_le32(CONTINUE_A64_TYPE);
>> 
>> This removes the erroneous cpu_to_le32().
>> 
>> Fixes: e84067d74301 ("scsi: qla2xxx: Add FC-NVMe F/W initialization
>> and transport registration")
>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>> ---
>>  drivers/scsi/qla2xxx/qla_nvme.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/drivers/scsi/qla2xxx/qla_nvme.c
>> b/drivers/scsi/qla2xxx/qla_nvme.c
>> index 1da8fa8f641d..14e25e32e622 100644
>> --- a/drivers/scsi/qla2xxx/qla_nvme.c
>> +++ b/drivers/scsi/qla2xxx/qla_nvme.c
>> @@ -441,7 +441,7 @@ static int qla2x00_start_nvme_mq(srb_t *sp)
>>  				req->ring_ptr++;
>>  			}
>>  			cont_pkt = (cont_a64_entry_t *)req-
>>> ring_ptr;
>> -			cont_pkt->entry_type =
>> cpu_to_le32(CONTINUE_A64_TYPE);
>> +			cont_pkt->entry_type = CONTINUE_A64_TYPE;
>>  
> 
> We already have a patch proposed for this, but I think it may be wrong
> (it's the same as yours, so yours may be wrong too) see the handling in
> qla_iocb.c
> 
> James

I will send patch which has correct usage in qla_iocb.c shortly. 

Thanks,
- Himanshu