Commit 3b12a0d1 authored Jul 15, 2013 by Jon Mason

NTB: Add Error Handling in ntb_device_setup

If an error is encountered in ntb_device_setup, it is possible that the
spci_cmd isn't populated. Writes to the offset can result in a NULL
pointer dereference. This issue is easily encountered by running in
NTB-RP mode, as it currently is not supported and will generate an
error. To get around this issue, return if an error is encountered
prior to attempting to write to the spci_cmd offset.

Signed-off-by: Jon Mason <jon.mason@intel.com>

parent 6e466452

drivers/ntb/ntb_hw.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -644,10 +644,13 @@ static int ntb_device_setup(struct ntb_device *ndev)
		rc = -ENODEV;
		}

		if (rc)
		return rc;

		/* Enable Bus Master and Memory Space on the secondary side */
		writew(PCI_COMMAND_MEMORY \| PCI_COMMAND_MASTER, ndev->reg_ofs.spci_cmd);

		return rc;
		return 0;
		}

		static void ntb_device_free(struct ntb_device *ndev)