| Message ID | 20241201171120.31616-1-johan+linaro@kernel.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | bus: mhi: host: pci_generic: fix MHI BAR mapping | expand |
[ Forgot to CC the regressions list ] 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. > > 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@linaro.org> > Cc: Mayank Rana <quic_mrana@quicinc.com> > Signed-off-by: Johan Hovold <johan+linaro@kernel.org> > --- > > The offending patch was marked as "Compile tested only", but that just > makes you wonder *why* the patch was never tested... > > https://lore.kernel.org/all/20241004023351.6946-1-manivannan.sadhasivam@linaro.org/ #regzbot ^introduced: bd23e836423e Johan
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);
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. 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@linaro.org> Cc: Mayank Rana <quic_mrana@quicinc.com> Signed-off-by: Johan Hovold <johan+linaro@kernel.org> --- The offending patch was marked as "Compile tested only", but that just makes you wonder *why* the patch was never tested... https://lore.kernel.org/all/20241004023351.6946-1-manivannan.sadhasivam@linaro.org/ Johan #regzbot introduced: bd23e836423e drivers/bus/mhi/host/pci_generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)