diff mbox series

[net] octeontx2-pf: Fix pfc_alloc_status array overflow

Message ID 20221123051010.2725917-1-sumang@marvell.com
State New
Headers
Series [net] octeontx2-pf: Fix pfc_alloc_status array overflow |

Commit Message

Suman Ghosh Nov. 23, 2022, 5:10 a.m. UTC 
  This patch addresses pfc_alloc_status array overflow occurring for
send queue index value greater than PFC priority. This is causing
mbox errors as otx2_get_smq_idx returing invalid smq value.

Fixes: 99c969a83d82 ("octeontx2-pf: Add egress PFC support")

Signed-off-by: Suman Ghosh <sumang@marvell.com>
---
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Leon Romanovsky Nov. 23, 2022, 7:57 a.m. UTC | #1 
On Wed, Nov 23, 2022 at 10:40:10AM +0530, Suman Ghosh wrote:
> This patch addresses pfc_alloc_status array overflow occurring for
> send queue index value greater than PFC priority. This is causing
> mbox errors as otx2_get_smq_idx returing invalid smq value.

Maybe this change is correct one, but commit message is missing an
explanation why internal function can receive "illegal" index and
why it is safe to continue.

> 
> Fixes: 99c969a83d82 ("octeontx2-pf: Add egress PFC support")
> 

No blank line here.

> Signed-off-by: Suman Ghosh <sumang@marvell.com>
> ---
>  drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
> index 282db6fe3b08..67aa02bb2b85 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
> @@ -884,7 +884,7 @@ static inline void otx2_dma_unmap_page(struct otx2_nic *pfvf,
>  static inline u16 otx2_get_smq_idx(struct otx2_nic *pfvf, u16 qidx)
>  {
>  #ifdef CONFIG_DCB
> -	if (pfvf->pfc_alloc_status[qidx])
> +	if (qidx < NIX_PF_PFC_PRIO_MAX && pfvf->pfc_alloc_status[qidx])
>  		return pfvf->pfc_schq_list[NIX_TXSCH_LVL_SMQ][qidx];
>  #endif
>  
> -- 
> 2.25.1
>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
index 282db6fe3b08..67aa02bb2b85 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
@@ -884,7 +884,7 @@  static inline void otx2_dma_unmap_page(struct otx2_nic *pfvf,
 static inline u16 otx2_get_smq_idx(struct otx2_nic *pfvf, u16 qidx)
 {
 #ifdef CONFIG_DCB
-	if (pfvf->pfc_alloc_status[qidx])
+	if (qidx < NIX_PF_PFC_PRIO_MAX && pfvf->pfc_alloc_status[qidx])
 		return pfvf->pfc_schq_list[NIX_TXSCH_LVL_SMQ][qidx];
 #endif