[PATCH v2 net] net/sonic: use dma_mapping_error() for error check

[PATCH v2 net] net/sonic: use dma_mapping_error() for error check

[Finn Thain]

From: Zhang Changzhong <zhangchangzhong@huawei.com>

The DMA address returned by dma_map_single() should be checked with
dma_mapping_error(). Fix it accordingly.

Fixes: efcce839360f ("[PATCH] macsonic/jazzsonic network drivers update")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
---
This was originally Zhang Changzhong's patch. I've just added the missing
curly bracket which caused a build failure when the patch was first posted.
---
 drivers/net/ethernet/natsemi/sonic.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/natsemi/sonic.c b/drivers/net/ethernet/natsemi/sonic.c
index d17d1b4f2585..825356ee3492 100644
--- a/drivers/net/ethernet/natsemi/sonic.c
+++ b/drivers/net/ethernet/natsemi/sonic.c
@@ -292,7 +292,7 @@ static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
 	 */
 
 	laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE);
-	if (!laddr) {
+	if (dma_mapping_error(lp->device, laddr)) {
 		pr_err_ratelimited("%s: failed to map tx DMA buffer.\n", dev->name);
 		dev_kfree_skb_any(skb);
 		return NETDEV_TX_OK;
@@ -509,7 +509,7 @@ static bool sonic_alloc_rb(struct net_device *dev, struct sonic_local *lp,
 
 	*new_addr = dma_map_single(lp->device, skb_put(*new_skb, SONIC_RBSIZE),
 				   SONIC_RBSIZE, DMA_FROM_DEVICE);
-	if (!*new_addr) {
+	if (dma_mapping_error(lp->device, *new_addr)) {
 		dev_kfree_skb(*new_skb);
 		*new_skb = NULL;
 		return false;
-- 
2.37.5

Re: [PATCH v2 net] net/sonic: use dma_mapping_error() for error check

[Leon Romanovsky]

On Tue, Mar 21, 2023 at 02:45:43PM +1100, Finn Thain wrote:
> From: Zhang Changzhong <zhangchangzhong@huawei.com>
> 
> The DMA address returned by dma_map_single() should be checked with
> dma_mapping_error(). Fix it accordingly.
> 
> Fixes: efcce839360f ("[PATCH] macsonic/jazzsonic network drivers update")
> Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
> Tested-by: Stan Johnson <userm57@yahoo.com>
> Signed-off-by: Finn Thain <fthain@linux-m68k.org>
> ---
> This was originally Zhang Changzhong's patch. I've just added the missing
> curly bracket which caused a build failure when the patch was first posted.
> ---
>  drivers/net/ethernet/natsemi/sonic.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 

Thanks,
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>

Re: [PATCH v2 net] net/sonic: use dma_mapping_error() for error check

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Tue, 21 Mar 2023 14:45:43 +1100 you wrote:
> From: Zhang Changzhong <zhangchangzhong@huawei.com>
> 
> The DMA address returned by dma_map_single() should be checked with
> dma_mapping_error(). Fix it accordingly.
> 
> Fixes: efcce839360f ("[PATCH] macsonic/jazzsonic network drivers update")
> Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
> Tested-by: Stan Johnson <userm57@yahoo.com>
> Signed-off-by: Finn Thain <fthain@linux-m68k.org>
> 
> [...]

Here is the summary with links:
  - [v2,net] net/sonic: use dma_mapping_error() for error check
    https://git.kernel.org/netdev/net/c/4107b8746d93

You are awesome, thank you!
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