before starting to access any address inside the PCI region we should
reserve the resource and release the resource when the module exits.
Signed-off-by: Sudip Mukherjee <sudip@xxxxxxxxxxxxxxx>
---
drivers/staging/sm7xxfb/sm7xxfb.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/staging/sm7xxfb/sm7xxfb.c b/drivers/staging/sm7xxfb/sm7xxfb.c
index 5b3e614..149286e 100644
--- a/drivers/staging/sm7xxfb/sm7xxfb.c
+++ b/drivers/staging/sm7xxfb/sm7xxfb.c
@@ -776,6 +776,12 @@ static int smtcfb_pci_probe(struct pci_dev *pdev,
if (err)
return err;
+ err = pci_request_region(pdev, 0, "sm7xxfb");
+ if (err < 0) {
+ dev_err(&pdev->dev, "cannot reserve framebuffer region\n");
+ goto failed_regions;
+ }
+
sprintf(smtcfb_fix.id, "sm%Xfb", ent->device);
sfb = smtc_alloc_fb_info(pdev);
@@ -905,6 +911,9 @@ failed_fb:
smtc_free_fb_info(sfb);
failed_free:
+ pci_release_region(pdev, 0);
+
+failed_regions:
pci_disable_device(pdev);
return err;
@@ -933,6 +942,7 @@ static void smtcfb_pci_remove(struct pci_dev *pdev)
smtc_unmap_mmio(sfb);
unregister_framebuffer(&sfb->fb);
smtc_free_fb_info(sfb);
+ pci_release_region(pdev, 0);
}
#ifdef CONFIG_PM
--
1.8.1.2
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