diff mbox series

[19/21] lpfc: Fix BFS crash with t10-dif enabled.

Message ID 20190522004911.573-20-jsmart2021@gmail.com (mailing list archive)
State Mainlined
Commit aa6ff309187256ee542a8cf47adbfcfdaa888c46
Headers show
Series lpfc: Update lpfc to revision 12.2.0.3 | expand

Commit Message

James Smart May 22, 2019, 12:49 a.m. UTC
Crashes in scsi_queue_rq or in dma_unmap_direct_sg during BFS when
lpfc has lpfc_enable_bg=1.

lpfc is setting the t10-dif and prot sg after scsi_add_host_with_dma()
has been called. The scsi_host_set_prot() and scsi_host_set_guard()
routines need to be called before scsi_add_host_with_dma().

Revise the calling sequence to set the protection/guard data before
calling scsi_add_host_with_dma().

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
---
 drivers/scsi/lpfc/lpfc_init.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Comments

Ewan Milne May 24, 2019, 4:32 p.m. UTC | #1
On Tue, 2019-05-21 at 17:49 -0700, James Smart wrote:
> Crashes in scsi_queue_rq or in dma_unmap_direct_sg during BFS when
> lpfc has lpfc_enable_bg=1.
> 
> lpfc is setting the t10-dif and prot sg after scsi_add_host_with_dma()
> has been called. The scsi_host_set_prot() and scsi_host_set_guard()
> routines need to be called before scsi_add_host_with_dma().
> 
> Revise the calling sequence to set the protection/guard data before
> calling scsi_add_host_with_dma().
> 
> Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
> Signed-off-by: James Smart <jsmart2021@gmail.com>
> ---
>  drivers/scsi/lpfc/lpfc_init.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
> index 416f0fb155f5..a2b827dd36ff 100644
> --- a/drivers/scsi/lpfc/lpfc_init.c
> +++ b/drivers/scsi/lpfc/lpfc_init.c
> @@ -94,6 +94,7 @@ static void lpfc_sli4_disable_intr(struct lpfc_hba *);
>  static uint32_t lpfc_sli4_enable_intr(struct lpfc_hba *, uint32_t);
>  static void lpfc_sli4_oas_verify(struct lpfc_hba *phba);
>  static uint16_t lpfc_find_cpu_handle(struct lpfc_hba *, uint16_t, int);
> +static void lpfc_setup_bg(struct lpfc_hba *, struct Scsi_Host *);
>  
>  static struct scsi_transport_template *lpfc_transport_template = NULL;
>  static struct scsi_transport_template *lpfc_vport_transport_template = NULL;
> @@ -4348,6 +4349,9 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
>  
>  	timer_setup(&vport->delayed_disc_tmo, lpfc_delayed_disc_tmo, 0);
>  
> +	if (phba->sli3_options & LPFC_SLI3_BG_ENABLED)
> +		lpfc_setup_bg(phba, shost);
> +
>  	error = scsi_add_host_with_dma(shost, dev, &phba->pcidev->dev);
>  	if (error)
>  		goto out_put_shost;
> @@ -7669,8 +7673,6 @@ lpfc_post_init_setup(struct lpfc_hba *phba)
>  	 */
>  	shost = pci_get_drvdata(phba->pcidev);
>  	shost->can_queue = phba->cfg_hba_queue_depth - 10;
> -	if (phba->sli3_options & LPFC_SLI3_BG_ENABLED)
> -		lpfc_setup_bg(phba, shost);
>  
>  	lpfc_host_attrib_init(shost);
>  

Reviewed-by: Ewan D. Milne <emilne@redhat.com>
diff mbox series

Patch

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 416f0fb155f5..a2b827dd36ff 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -94,6 +94,7 @@  static void lpfc_sli4_disable_intr(struct lpfc_hba *);
 static uint32_t lpfc_sli4_enable_intr(struct lpfc_hba *, uint32_t);
 static void lpfc_sli4_oas_verify(struct lpfc_hba *phba);
 static uint16_t lpfc_find_cpu_handle(struct lpfc_hba *, uint16_t, int);
+static void lpfc_setup_bg(struct lpfc_hba *, struct Scsi_Host *);
 
 static struct scsi_transport_template *lpfc_transport_template = NULL;
 static struct scsi_transport_template *lpfc_vport_transport_template = NULL;
@@ -4348,6 +4349,9 @@  lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
 
 	timer_setup(&vport->delayed_disc_tmo, lpfc_delayed_disc_tmo, 0);
 
+	if (phba->sli3_options & LPFC_SLI3_BG_ENABLED)
+		lpfc_setup_bg(phba, shost);
+
 	error = scsi_add_host_with_dma(shost, dev, &phba->pcidev->dev);
 	if (error)
 		goto out_put_shost;
@@ -7669,8 +7673,6 @@  lpfc_post_init_setup(struct lpfc_hba *phba)
 	 */
 	shost = pci_get_drvdata(phba->pcidev);
 	shost->can_queue = phba->cfg_hba_queue_depth - 10;
-	if (phba->sli3_options & LPFC_SLI3_BG_ENABLED)
-		lpfc_setup_bg(phba, shost);
 
 	lpfc_host_attrib_init(shost);