On Sun, Dec 01, 2024 at 06:11:20PM +0100, Johan Hovold wrote:
> A recent change converting the MHI pci_generic driver to use
> pcim_iomap_region() failed to update the BAR parameter which is an index
> rather than a mask.
>
That's silly on me. Thanks for the fix!
> This specifically broke the modem on machines like the Lenovo ThinkPad
> X13s and x1e80100 CRD:
>
> mhi-pci-generic 0004:01:00.0: failed to map pci region: -22
> mhi-pci-generic 0004:01:00.0: probe with driver mhi-pci-generic failed with error -22
>
> Fixes: bd23e836423e ("bus: mhi: host: pci_generic: Use pcim_iomap_region() to request and map MHI BAR")
> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
> Cc: Mayank Rana <quic_mrana@xxxxxxxxxxx>
> Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
> ---
>
> The offending patch was marked as "Compile tested only", but that just
> makes you wonder *why* the patch was never tested...
>
Because I didn't had a modem platform to test my change and since it was a
simple API conversion, I merged it after some time.
- Mani
> https://lore.kernel.org/all/20241004023351.6946-1-manivannan.sadhasivam@xxxxxxxxxx/
>
> Johan
>
>
> #regzbot introduced: bd23e836423e
>
>
> drivers/bus/mhi/host/pci_generic.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
> index 07645ce2119a..56ba4192c89c 100644
> --- a/drivers/bus/mhi/host/pci_generic.c
> +++ b/drivers/bus/mhi/host/pci_generic.c
> @@ -917,7 +917,7 @@ static int mhi_pci_claim(struct mhi_controller *mhi_cntrl,
> return err;
> }
>
> - mhi_cntrl->regs = pcim_iomap_region(pdev, 1 << bar_num, pci_name(pdev));
> + mhi_cntrl->regs = pcim_iomap_region(pdev, bar_num, pci_name(pdev));
> if (IS_ERR(mhi_cntrl->regs)) {
> err = PTR_ERR(mhi_cntrl->regs);
> dev_err(&pdev->dev, "failed to map pci region: %d\n", err);
> --
> 2.45.2
>
--
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