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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2018-02-02 20:39:13 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-24 11:01:29 +0100 |
| commit | 8b0c4a2e04f73643b91a99d03234482402f0e955 (patch) | |
| tree | 827b98d17b3b0fc220806c4fa6abeef8d5ebd018 /drivers/tty/serial | |
| parent | 00fb52a3828ddc3c576f84260df3a60716bb7343 (diff) | |
| download | linux-stable-8b0c4a2e04f73643b91a99d03234482402f0e955.tar.gz linux-stable-8b0c4a2e04f73643b91a99d03234482402f0e955.tar.bz2 linux-stable-8b0c4a2e04f73643b91a99d03234482402f0e955.zip | |
serial: 8250_pci: Don't fail on multiport card class
commit e7f3e99cb1a667d04d60d02957fbed58b50d4e5a upstream.
Do not fail on multiport cards in serial_pci_is_class_communication().
It restores behaviour for SUNIX multiport cards, that enumerated by
class and have a custom board data.
Moreover it allows users to reenumerate port-by-port from user space.
Fixes: 7d8905d06405 ("serial: 8250_pci: Enable device after we check black list")
Reported-by: Nikola Ciprich <nikola.ciprich@linuxbox.cz>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Nikola Ciprich <nikola.ciprich@linuxbox.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/8250/8250_pci.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 908110b5cf10..0d814a87acb2 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -3389,11 +3389,9 @@ static int serial_pci_is_class_communication(struct pci_dev *dev) /* * If it is not a communications device or the programming * interface is greater than 6, give up. - * - * (Should we try to make guesses for multiport serial devices - * later?) */ if ((((dev->class >> 8) != PCI_CLASS_COMMUNICATION_SERIAL) && + ((dev->class >> 8) != PCI_CLASS_COMMUNICATION_MULTISERIAL) && ((dev->class >> 8) != PCI_CLASS_COMMUNICATION_MODEM)) || (dev->class & 0xff) > 6) return -ENODEV; @@ -3430,6 +3428,12 @@ serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board) { int num_iomem, num_port, first_port = -1, i; + /* + * Should we try to make guesses for multiport serial devices later? + */ + if ((dev->class >> 8) == PCI_CLASS_COMMUNICATION_MULTISERIAL) + return -ENODEV; + num_iomem = num_port = 0; for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) { if (pci_resource_flags(dev, i) & IORESOURCE_IO) { |