Re: [PATCH 4.19 096/116] net: netcp: Fix an error message

From: Marion & Christophe JAILLET
Date: Mon May 31 2021 - 14:44:44 EST



Le 31/05/2021 à 15:14, Greg Kroah-Hartman a écrit :
From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>

[ Upstream commit ddb6e00f8413e885ff826e32521cff7924661de0 ]

'ret' is known to be 0 here.
The expected error code is stored in 'tx_pipe->dma_queue', so use it
instead.

While at it, switch from %d to %pe which is more user friendly.

Fixes: 84640e27f230 ("net: netcp: Add Keystone NetCP core ethernet driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/ti/netcp_core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/ti/netcp_core.c b/drivers/net/ethernet/ti/netcp_core.c
index a1d335a3c5e4..60d411bbbdc6 100644
--- a/drivers/net/ethernet/ti/netcp_core.c
+++ b/drivers/net/ethernet/ti/netcp_core.c
@@ -1364,8 +1364,8 @@ int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe)
tx_pipe->dma_queue = knav_queue_open(name, tx_pipe->dma_queue_id,
KNAV_QUEUE_SHARED);
if (IS_ERR(tx_pipe->dma_queue)) {
- dev_err(dev, "Could not open DMA queue for channel \"%s\": %d\n",
- name, ret);
+ dev_err(dev, "Could not open DMA queue for channel \"%s\": %pe\n",
+ name, tx_pipe->dma_queue);
ret = PTR_ERR(tx_pipe->dma_queue);
goto err;
}


Hi,

Apparently %pe is only supported up to (including) 5.5. It is not part of 5.4.123.

So this patch should not be backported here or should be backported differently, ie:
   leave dev_err as-is
   move "ret = PTR_ERR(tx_pipe->dma_queue);" 1 line above

(or %pe should be backported first)


PS: adding Dan Carpenter because we had a small discussion about some potential backport issue when, using %pe

CJ