From c161f29bd69fbc66374cf46fb51677bdc30e8c21 Mon Sep 17 00:00:00 2001 From: Arend van Spriel Date: Mon, 8 Jun 2015 14:38:34 +0200 Subject: [PATCH] brcmfmac: remove watchdog reset from brcmf_pcie_buscoreprep() The watchdog reset as done in brcmf_pcie_buscoreprep() is not sufficient. It needs to modify PCIe core registers as well which is properly done by brcmf_pcie_reset_device() after the chip recognition is done. So the faulty watchdog reset can be removed as it was causing driver reload to fail and hang the system requiring a power-cycle. Instead the call to to the brcmf_pcie_reset_device() function is done twice in the unload. Reviewed-by: Hante Meuleman Reviewed-by: Daniel (Deognyoun) Kim Reviewed-by: Franky (Zhenhui) Lin Reviewed-by: Pieter-Paul Giesberts Signed-off-by: Arend van Spriel Signed-off-by: Kalle Valo --- drivers/net/wireless/brcm80211/brcmfmac/pcie.c | 16 ++-------------- 1 file changed, 2 insertions(+), 14 deletions(-) diff --git a/drivers/net/wireless/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/brcm80211/brcmfmac/pcie.c index 37a2624d7bba..3a98c4306d1d 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/pcie.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/pcie.c @@ -1629,20 +1629,7 @@ static void brcmf_pcie_buscore_write32(void *ctx, u32 addr, u32 value) static int brcmf_pcie_buscoreprep(void *ctx) { - struct brcmf_pciedev_info *devinfo = (struct brcmf_pciedev_info *)ctx; - int err; - - err = brcmf_pcie_get_resource(devinfo); - if (err == 0) { - /* Set CC watchdog to reset all the cores on the chip to bring - * back dongle to a sane state. - */ - brcmf_pcie_buscore_write32(ctx, CORE_CC_REG(SI_ENUM_BASE, - watchdog), 4); - msleep(100); - } - - return err; + return brcmf_pcie_get_resource(ctx); } @@ -1824,6 +1811,7 @@ brcmf_pcie_remove(struct pci_dev *pdev) brcmf_pcie_intr_disable(devinfo); brcmf_detach(&pdev->dev); + brcmf_pcie_reset_device(devinfo); kfree(bus->bus_priv.pcie); kfree(bus->msgbuf->flowrings); -- 2.20.1