patch 9b96fba, currently in linux-next, clears interrupts using uap->port.membase that has not been assigned. My x86 system, that uses a pci-to-amba bridge, panics with a message like: BUG: unable to handle kernel NULL pointer dereference at 00000038 IP: [<c12c85ed>] pl011_probe+0x119/0x303 Signed-off-by: Alessandro Rubini <rubini@xxxxxxxxx> Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@xxxxxx> --- drivers/tty/serial/amba-pl011.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 2b4e981..38c992d 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1947,8 +1947,8 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id) } /* Ensure interrupts from this UART are masked and cleared */ - writew(0, uap->port.membase + UART011_IMSC); - writew(0xffff, uap->port.membase + UART011_ICR); + writew(0, base + UART011_IMSC); + writew(0xffff, base + UART011_ICR); uap->vendor = vendor; uap->lcrh_rx = vendor->lcrh_rx; -- 1.7.7.2 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
