2017-07-12 09:32:52

by Arend van Spriel

Subject: [PATCH for-4.13] brcmfmac: fix regression in brcmf_sdio_txpkt_hdalign()

Recent change in brcmf_sdio_txpkt_hdalign() changed the
behavior and now always returns 0. This resulted in a
regression which basically renders the device useless.

Fixes: 270a6c1f65fe ("brcmfmac: rework headroom check in .start_xmit()")
Reported-by: S. Gilles <[email protected]>
Tested-by: S. Gilles <[email protected]>
Signed-off-by: Arend van Spriel <[email protected]>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index fbcbb43..c3ecec6 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -2053,12 +2053,13 @@ static int brcmf_sdio_txpkt_hdalign(struct brcmf_sdio *bus, struct sk_buff *pkt)
atomic_inc(&stats->pktcow_failed);
return -ENOMEM;
}
+ head_pad = 0;
}
skb_push(pkt, head_pad);
dat_buf = (u8 *)(pkt->data);
}
memset(dat_buf, 0, head_pad + bus->tx_hdrlen);
- return 0;
+ return head_pad;
}

/**
--
1.9.1

2017-07-21 07:41:08

by Kalle Valo

Subject: Re: [for-4.13] brcmfmac: fix regression in brcmf_sdio_txpkt_hdalign()

Arend Van Spriel <[email protected]> wrote:

> Recent change in brcmf_sdio_txpkt_hdalign() changed the
> behavior and now always returns 0. This resulted in a
> regression which basically renders the device useless.
>
> Fixes: 270a6c1f65fe ("brcmfmac: rework headroom check in .start_xmit()")
> Reported-by: S. Gilles <[email protected]>
> Tested-by: S. Gilles <[email protected]>
> Signed-off-by: Arend van Spriel <[email protected]>

Patch applied to wireless-drivers.git, thanks.

0a16628212b8 brcmfmac: fix regression in brcmf_sdio_txpkt_hdalign()

--
https://patchwork.kernel.org/patch/9836383/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

2017-07-12 14:57:45

by Arend van Spriel

Subject: Re: [PATCH for-4.13] brcmfmac: fix regression in brcmf_sdio_txpkt_hdalign()

On 12-07-17 16:29, Bob Copeland wrote:
> On Wed, Jul 12, 2017 at 10:32:48AM +0100, Arend van Spriel wrote:
>> Recent change in brcmf_sdio_txpkt_hdalign() changed the
>> behavior and now always returns 0. This resulted in a
>> regression which basically renders the device useless.
>
> Should this go via netdev as well, or just wait for Kalle (returning
> on Sunday)?

Hi Bob,

This regression got introduced recently so the issue will pop-up in
v4.13-rc1 hence I figured we can wait for Kalle with this one.

Regards,
Arend

2017-07-12 14:29:59

by Bob Copeland

Subject: Re: [PATCH for-4.13] brcmfmac: fix regression in brcmf_sdio_txpkt_hdalign()

On Wed, Jul 12, 2017 at 10:32:48AM +0100, Arend van Spriel wrote:
> Recent change in brcmf_sdio_txpkt_hdalign() changed the
> behavior and now always returns 0. This resulted in a
> regression which basically renders the device useless.

Should this go via netdev as well, or just wait for Kalle (returning
on Sunday)?

--
Bob Copeland %% https://bobcopeland.com/