[PATCH 4.9 241/241] usb: gadget: bdc: 64-bit pointer capability check

From: Greg Kroah-Hartman
Date: Mon Mar 19 2018 - 15:00:12 EST


4.9-stable review patch. If anyone has any objections, please let me know.

------------------

From: Srinath Mannam <srinath.mannam@xxxxxxxxxxxx>

commit c8e4e5bdb62a5ac6f860ebcaaf7b467b62f453f1 upstream.

Corrected the register to check the 64-bit pointer
capability state. 64-bit pointer implementation capability
was checking in wrong register, which causes the BDC
enumeration failure in 64-bit memory address.

Fixes: efed421a94e6 ("usb: gadget: Add UDC driver for
Broadcom USB3.0 device controller IP BDC")

Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Signed-off-by: Srinath Mannam <srinath.mannam@xxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/usb/gadget/udc/bdc/bdc_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/gadget/udc/bdc/bdc_core.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_core.c
@@ -475,7 +475,7 @@ static int bdc_probe(struct platform_dev
bdc->dev = dev;
dev_dbg(bdc->dev, "bdc->regs: %p irq=%d\n", bdc->regs, bdc->irq);

- temp = bdc_readl(bdc->regs, BDC_BDCSC);
+ temp = bdc_readl(bdc->regs, BDC_BDCCAP1);
if ((temp & BDC_P64) &&
!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64))) {
dev_dbg(bdc->dev, "Using 64-bit address\n");