diff options
| author | Vincent Whitchurch <vincent.whitchurch@axis.com> | 2023-01-26 11:47:10 +0100 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2023-02-13 10:14:31 +0100 |
| commit | 935f8f7a0123ffa0a2dd7234713dc2ebeeb08955 (patch) | |
| tree | fed9705f00fac7d49357059b41e74f276a1e58e6 /arch/um | |
| parent | 314a1408b79a844dafdcde867d90de5d509409b7 (diff) | |
| download | linux-935f8f7a0123ffa0a2dd7234713dc2ebeeb08955.tar.gz | |
um-virt-pci: Make max delay configurable
There is a hard coded maximum time for which the driver busy-loops
waiting for a response from the virtio device. This default time may be
too short for some systems, so make it a module parameter so that it can
be set via the kernel command line.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/drivers/virt-pci.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/um/drivers/virt-pci.c b/arch/um/drivers/virt-pci.c index 6884e1be38e4..0aa71c08210d 100644 --- a/arch/um/drivers/virt-pci.c +++ b/arch/um/drivers/virt-pci.c @@ -54,7 +54,8 @@ static struct irq_domain *um_pci_inner_domain; static struct irq_domain *um_pci_msi_domain; static unsigned long um_pci_msi_used[BITS_TO_LONGS(MAX_MSI_VECTORS)]; -#define UM_VIRT_PCI_MAXDELAY 40000 +static unsigned int um_pci_max_delay_us = 40000; +module_param_named(max_delay_us, um_pci_max_delay_us, uint, 0644); struct um_pci_message_buffer { struct virtio_pcidev_msg hdr; @@ -155,7 +156,7 @@ static int um_pci_send_cmd(struct um_pci_device *dev, kfree(completed); if (WARN_ONCE(virtqueue_is_broken(dev->cmd_vq) || - ++delay_count > UM_VIRT_PCI_MAXDELAY, + ++delay_count > um_pci_max_delay_us, "um virt-pci delay: %d", delay_count)) { ret = -EIO; break; |