On 10/13/2015 10:02 PM, Arnd Bergmann wrote:
> The iproc PCI driver tries to figure out whether the MMIO window has
> a valid size, but does this using a 64-bit modulo operation, which
> is not allowed on 32-bit kernels and leads to a link error:
>
> drivers/built-in.o: In function `iproc_pcie_setup':
> :(.text+0x4b798): undefined reference to `__aeabi_uldivmod'
>
> This works around that error by using the div64_u64() function
> provided by the kernel. While this is an expensive operation,
> it is harmless because we only call it during the probing
> of the driver.
>
> Signed-off-by: Arnd Bergmann <a...@arndb.de>
> Fixes: 0ab99ca8eb6c ("PCI: iproc: Fix compile warnings")
>
> diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c
> index f3481ddff344..abcb4be2ee19 100644
> --- a/drivers/pci/host/pcie-iproc.c
> +++ b/drivers/pci/host/pcie-iproc.c
> @@ -235,12 +235,13 @@ static void iproc_pcie_enable(struct iproc_pcie *pcie)
> *
> * axi_addr -> iproc_pcie_address -> OARR -> OMAP -> pci_address
> */
> -static int iproc_pcie_setup_ob(struct iproc_pcie *pcie, u64 axi_addr,
> +int iproc_pcie_setup_ob(struct iproc_pcie *pcie, u64 axi_addr,
Why are you removing the static here?
> u64 pci_addr, resource_size_t size)
> {
> struct iproc_pcie_ob *ob = &pcie->ob;
> unsigned i;
> u64 max_size = (u64)ob->window_size * MAX_NUM_OB_WINDOWS;
> + u64 remainder;
>
> if (size > max_size) {
> dev_err(pcie->dev,
> @@ -249,7 +250,8 @@ static int iproc_pcie_setup_ob(struct iproc_pcie *pcie,
> u64 axi_addr,
> return -EINVAL;
> }
>
> - if (size % ob->window_size) {
> + div64_u64_rem(size, ob->window_size, &remainder);
> + if (remainder) {
> dev_err(pcie->dev,
> "res size %pap needs to be multiple of window size
> %pap\n",
> &size, &ob->window_size);
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
