Commit 187fade8 authored by Anatolij Gustschin's avatar Anatolij Gustschin Committed by Greg Kroah-Hartman

fpga: altera-cvp: fix 'bad IO access' on x86_64

If mapping the CvP BAR fails, we still can configure the FPGA via
PCI config space access. In this case the iomap pointer is NULL.
On x86_64, passing NULL address to pci_iounmap() generates
"Bad IO access at port 0x0" output with stack call trace. Fix it.
Signed-off-by: default avatarAnatolij Gustschin <agust@denx.de>
Acked-by: default avatarAlan Tull <atull@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1e510603
......@@ -477,6 +477,7 @@ static int altera_cvp_probe(struct pci_dev *pdev,
return 0;
err_unmap:
if (conf->map)
pci_iounmap(pdev, conf->map);
pci_release_region(pdev, CVP_BAR);
err_disable:
......@@ -493,6 +494,7 @@ static void altera_cvp_remove(struct pci_dev *pdev)
driver_remove_file(&altera_cvp_driver.driver, &driver_attr_chkcfg);
fpga_mgr_unregister(mgr);
if (conf->map)
pci_iounmap(pdev, conf->map);
pci_release_region(pdev, CVP_BAR);
pci_read_config_word(pdev, PCI_COMMAND, &cmd);
......
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