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@xxxxxxxxxx>
Cc: Mayank Rana <quic_mrana@xxxxxxxxxxx>
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
---
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@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
