bugfix: enable master at probe time

The device is master-enabled at boot time, but the disable_device() at remove time clears it. pci_enable_device() doesn't re-enable, so we need to also pci_set_master(). Otherwise DMA works at first load, and the machine freezes at second load. Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

bugfix: enable master at probe time
The device is master-enabled at boot time, but the disable_device() at remove time clears it. pci_enable_device() doesn't re-enable, so we need to also pci_set_master(). Otherwise DMA works at first load, and the machine freezes at second load. Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
d7d1465e · Alessandro Rubini · 55cd31d4 · d7d1465e
Commit d7d1465e authored Jul 02, 2013 by Alessandro Rubini
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spec-pci.c kernel/spec-pci.c +1 -0

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--- a/kernel/spec-pci.c
+++ b/kernel/spec-pci.c
@@ -94,6 +94,7 @@ static int spec_probe(struct pci_dev *pdev,
 	ret = pci_enable_device(pdev);
 	if (ret < 0)
 		return ret;
+	 pci_set_master(pdev);

 	spec = kzalloc(sizeof(*spec), GFP_KERNEL);
 	if (!spec)