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brcmfmac: have sdio return -EIO when device communication is not possible 

The bus interface functions txctl and rxctl may be used while the device
can not be accessed, eg. upon driver .remove() callback. This patch will
immediately return -EIO when this is the case which speeds up the module
unload.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
hifive-unleashed-5.1
Arend van Spriel 2015-06-11 00:12:20 +02:00 committed by Kalle Valo
parent 1f0dc59a6d
commit 5768f31e4e
2 changed files with 7 additions and 0 deletions
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1
drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
View File

@ -988,6 +988,7 @@ static void brcmf_sdiod_freezer_detach(struct brcmf_sdio_dev *sdiodev)
static int brcmf_sdiod_remove(struct brcmf_sdio_dev *sdiodev)
{
sdiodev->state = BRCMF_SDIOD_DOWN;
if (sdiodev->bus) {
brcmf_sdio_remove(sdiodev->bus);
sdiodev->bus = NULL;

6
drivers/net/wireless/brcm80211/brcmfmac/sdio.c
View File

@ -2820,6 +2820,8 @@ static int brcmf_sdio_bus_txdata(struct device *dev, struct sk_buff *pkt)
struct brcmf_sdio *bus = sdiodev->bus;
brcmf_dbg(TRACE, "Enter: pkt: data %p len %d\n", pkt->data, pkt->len);
if (sdiodev->state != BRCMF_SDIOD_DATA)
return -EIO;
/* Add space for the header */
skb_push(pkt, bus->tx_hdrlen);
@ -2948,6 +2950,8 @@ brcmf_sdio_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
int ret;
brcmf_dbg(TRACE, "Enter\n");
if (sdiodev->state != BRCMF_SDIOD_DATA)
return -EIO;
/* Send from dpc */
bus->ctrl_frame_buf = msg;
@ -3238,6 +3242,8 @@ brcmf_sdio_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen)
struct brcmf_sdio *bus = sdiodev->bus;
brcmf_dbg(TRACE, "Enter\n");
if (sdiodev->state != BRCMF_SDIOD_DATA)
return -EIO;
/* Wait until control frame is available */
timeleft = brcmf_sdio_dcmd_resp_wait(bus, &bus->rxlen, &pending);