pci: accept 32-bit domain numbers

The parsing code was bailing on domains greater than UINT16_MAX,
but domain numbers like that are still valid and present on some systems.
One example is Intel VMD (Volume Management Device), which acts somewhat
as a software-managed PCI switch and its upstream linux driver assigns
all downstream devices a PCI domain of 0x10000.

Parsing a BDF like 10000:01:00.0 was failing before. To fix it, increase
the upper limit of domain number to UINT32_MAX. This matches the size of
struct rte_pci_addr->domain (uint32).

Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Acked-by: Gaetan Rivet <grive@u256.net>

diff --git a/lib/librte_pci/rte_pci.c b/lib/librte_pci/rte_pci.c
index d1ab6b4..ad2cdfe 100644 (file)
--- a/lib/librte_pci/rte_pci.c
+++ b/lib/librte_pci/rte_pci.c
@@ -72,9 +72,9 @@ pci_dbdf_parse(const char *input, struct rte_pci_addr *dev_addr)
 
        errno = 0;
        val = strtoul(in, &end, 16);
-       if (errno != 0 || end[0] != ':' || val > UINT16_MAX)
+       if (errno != 0 || end[0] != ':' || val > UINT32_MAX)
                return -EINVAL;
-       dev_addr->domain = (uint16_t)val;
+       dev_addr->domain = (uint32_t)val;
        in = end + 1;
        in = get_u8_pciaddr_field(in, &dev_addr->bus, ':');
        if (in == NULL)