diff options
Diffstat (limited to 'Documentation/PCI')
-rw-r--r-- | Documentation/PCI/MSI-HOWTO.txt | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/Documentation/PCI/MSI-HOWTO.txt b/Documentation/PCI/MSI-HOWTO.txt index c504f12bcc61..28d1ceeea655 100644 --- a/Documentation/PCI/MSI-HOWTO.txt +++ b/Documentation/PCI/MSI-HOWTO.txt | |||
@@ -171,7 +171,8 @@ which should be at least 'nvec' entries in size. On success, the | |||
171 | device is switched into MSI-X mode and the function returns 0. | 171 | device is switched into MSI-X mode and the function returns 0. |
172 | The 'vector' member in each entry is populated with the interrupt number; | 172 | The 'vector' member in each entry is populated with the interrupt number; |
173 | the driver should then call request_irq() for each 'vector' that it | 173 | the driver should then call request_irq() for each 'vector' that it |
174 | decides to use. | 174 | decides to use. The device driver is responsible for keeping track of the |
175 | interrupts assigned to the MSI-X vectors so it can free them again later. | ||
175 | 176 | ||
176 | If this function returns a negative number, it indicates an error and | 177 | If this function returns a negative number, it indicates an error and |
177 | the driver should not attempt to allocate any more MSI-X interrupts for | 178 | the driver should not attempt to allocate any more MSI-X interrupts for |
@@ -181,9 +182,7 @@ below. | |||
181 | 182 | ||
182 | This function, in contrast with pci_enable_msi(), does not adjust | 183 | This function, in contrast with pci_enable_msi(), does not adjust |
183 | dev->irq. The device will not generate interrupts for this interrupt | 184 | dev->irq. The device will not generate interrupts for this interrupt |
184 | number once MSI-X is enabled. The device driver is responsible for | 185 | number once MSI-X is enabled. |
185 | keeping track of the interrupts assigned to the MSI-X vectors so it can | ||
186 | free them again later. | ||
187 | 186 | ||
188 | Device drivers should normally call this function once per device | 187 | Device drivers should normally call this function once per device |
189 | during the initialization phase. | 188 | during the initialization phase. |