For PCIE wireless device with core revision less than 14, device may miss PCIE to System Backplane Interrupt via PCIEtoSBMailbox. So add sending mail box interrupt twice as a hardware workaround.
Signed-off-by: Wright Feng <[email protected]> --- v2: add comment and check for PCIE core revision v3: fix compile error --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c index fd3968f..d7d3e93 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c @@ -675,6 +675,7 @@ static int brcmf_pcie_send_mb_data(struct brcmf_pciedev_info *devinfo, u32 htod_mb_data) { struct brcmf_pcie_shared_info *shared; + struct brcmf_core *core; u32 addr; u32 cur_htod_mb_data; u32 i; @@ -698,7 +699,11 @@ brcmf_pcie_send_mb_data(struct brcmf_pciedev_info *devinfo, u32 htod_mb_data) brcmf_pcie_write_tcm32(devinfo, addr, htod_mb_data); pci_write_config_dword(devinfo->pdev, BRCMF_PCIE_REG_SBMBX, 1); - pci_write_config_dword(devinfo->pdev, BRCMF_PCIE_REG_SBMBX, 1); + + /* Send mailbox interrupt twice as a hardware workaround */ + core = brcmf_chip_get_core(devinfo->ci, BCMA_CORE_PCIE2); + if (core->rev <= 13) + pci_write_config_dword(devinfo->pdev, BRCMF_PCIE_REG_SBMBX, 1); return 0; } -- 2.1.0
