brcmfmac: disable command decode in sdio_aos

AOS is a part of the SDIOD core that becomes active when the rest of
SDIOD is sleeping to keep SDIO bus alive responding to reduced set of
commands.

Transaction between AOS and SDIOD is not protected, and if cmd 52 is
received in AOS and in the middle of response state changed from AOS to
SDIOD, response is corrupted and it causes to SDIO Host controller to
hang.

Command decode for below chips are disabled in this commit:
 - 4339
 - 4345
 - 4354
 - 4373

Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Wright Feng <wright.feng@cypress.com>
Signed-off-by: Double Lo <double.lo@cypress.com>
Signed-off-by: Madhan Mohan R <madhanmohan.r@cypress.com>
Signed-off-by: Chi-Hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index fe0cb398ab44ccd13389d9ddefa1686c0513df1f..0cd5b8d970d7074473621333151874c7120c5eff 100644 (file)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -3354,7 +3354,11 @@ err:
 
 static bool brcmf_sdio_aos_no_decode(struct brcmf_sdio *bus)
 {
-       if (bus->ci->chip == CY_CC_43012_CHIP_ID)
+       if (bus->ci->chip == CY_CC_43012_CHIP_ID ||
+           bus->ci->chip == CY_CC_4373_CHIP_ID ||
+           bus->ci->chip == BRCM_CC_4339_CHIP_ID ||
+           bus->ci->chip == BRCM_CC_4345_CHIP_ID ||
+           bus->ci->chip == BRCM_CC_4354_CHIP_ID)
                return true;
        else
                return false;