mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 06:40:53 +07:00
[PATCH] msi: support masking msi irqs without a mask bit
For devices that do not support msi-x we only support 1 interrupt. Therefore we can disable that one interrupt by disabling the msi capability itself. If we leave the intx interrupts disabled while we have the msi capability disabled no interrupts should be delivered from that device. Devices with just the minimal msi support (and thus hitting this code path) include things like the intel e1000 nic, so it looks like is going to be a fairly common case and thus important to get right. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
b1cbf4e4dd
commit
58e0543e8f
@ -85,6 +85,8 @@ static void msi_set_mask_bit(unsigned int irq, int flag)
|
||||
mask_bits &= ~(1);
|
||||
mask_bits |= flag;
|
||||
pci_write_config_dword(entry->dev, pos, mask_bits);
|
||||
} else {
|
||||
msi_set_enable(entry->dev, !flag);
|
||||
}
|
||||
break;
|
||||
case PCI_CAP_ID_MSIX:
|
||||
|
Loading…
Reference in New Issue
Block a user