[lkml]   [2019]   [Jun]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCHv5 04/20] PCI: mobiveil: Remove the flag MSI_FLAG_MULTI_PCI_MSI
On 11/06/2019 17:59, Lorenzo Pieralisi wrote:
> On Fri, Apr 12, 2019 at 08:35:36AM +0000, Z.q. Hou wrote:
>> From: Hou Zhiqiang <>
>> The current code does not support multiple MSIs, so remove
>> the corresponding flag from the msi_domain_info structure.
> Please explain me what's the problem before removing multi MSI
> support.

The reason seems to be the following code in the allocator:

WARN_ON(nr_irqs != 1);

bit = find_first_zero_bit(msi->msi_irq_in_use, msi->num_of_vectors);
if (bit >= msi->num_of_vectors) {
return -ENOSPC;

set_bit(bit, msi->msi_irq_in_use);

So instead of fixing the allocator, the author prefers disabling
the feature. I'm not sure whether that is an acceptable outcome...


Jazz is not dead. It just smells funny...

 \ /
  Last update: 2019-06-11 19:31    [W:0.107 / U:0.388 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site