brcmfmac: firmware shared data version fix

Firware shared data structure is backward compatible for fields
we are interested in.
Allow reading of shared data in case of version mismatch.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Piotr Haber <phaber@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
index ac9f650..5d5c02c 100644 (file)
--- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
@@ -2721,8 +2721,8 @@ static int brcmf_sdio_readshared(struct brcmf_sdio *bus,
        sh->console_addr = le32_to_cpu(sh_le.console_addr);
        sh->msgtrace_addr = le32_to_cpu(sh_le.msgtrace_addr);
 
-       if ((sh->flags & SDPCM_SHARED_VERSION_MASK) != SDPCM_SHARED_VERSION) {
-               brcmf_err("sdpcm_shared version mismatch: dhd %d dongle %d\n",
+       if ((sh->flags & SDPCM_SHARED_VERSION_MASK) > SDPCM_SHARED_VERSION) {
+               brcmf_err("sdpcm shared version unsupported: dhd %d dongle %d\n",
                          SDPCM_SHARED_VERSION,
                          sh->flags & SDPCM_SHARED_VERSION_MASK);
                return -EPROTO;