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This copies the pci_alloc_irq_vectors() function from kernel 4.9 and
replaces the __pci_enable_msi{x}_range() calls with calls to
pci_enable_msi{x}_range(), these were backported to kernel versions <
3.14, so no need to handle the older kernels specially here.
This also adds support for MSIx IRQs and adds the PCI_IRQ_* defines.
Fixes: 162a6b312f1b ("add support for pci_alloc_irq_vectors")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Omer Dagan <omer.dagan@tandemg.com>
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pci_alloc_irq_vectors() needs to be wrapped in CONFIG_PCI and
CONFIG_PCI_MSI definition to avoid a function redefinition compiler
error.
Fixes: 162a6b312f1b ("add support for pci_alloc_irq_vectors")
Signed-off-by: Winnie Chang <winnie.chang@cypress.com>
Signed-off-by: Chi-Hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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add support for function in kernels under 4.8
function is a wrapper around 'pci_enable_msi_block' or
'pci_enable_msi_range' depending on the kernel version
the min\max number of interrupts was overridden to always use the
max number of interrupts which seems correct since it was not
supported in the old APIs
Signed-off-by: Omer Dagan <omer.dagan@tandemg.com>
[use GPL expert as everything in backports, remove unused ifdef]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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