mirror of
https://github.com/torvalds/linux.git
synced 2024-12-13 14:43:03 +00:00
d6776bba44
Keep IRQ mappings on context teardown. This won't leak IRQs as if we allocate the mapping again, the generic code will give the same mapping used last time. Doing this works around a race in the generic code. Masking the interrupt introduces a race which can crash the kernel or result in IRQ that is never EOIed. The lost of EOI results in all subsequent mappings to the same HW IRQ never receiving an interrupt. We've seen this race with cxl test cases which are doing heavy context startup and teardown at the same time as heavy interrupt load. A fix to the generic code is being investigated also. Signed-off-by: Michael Neuling <mikey@neuling.org> Cc: stable@vger.kernel.org # 3.8 Tested-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Tested-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
||
|---|---|---|
| .. | ||
| api.c | ||
| base.c | ||
| context.c | ||
| cxl.h | ||
| debugfs.c | ||
| fault.c | ||
| file.c | ||
| flash.c | ||
| guest.c | ||
| hcalls.c | ||
| hcalls.h | ||
| irq.c | ||
| Kconfig | ||
| main.c | ||
| Makefile | ||
| native.c | ||
| of.c | ||
| pci.c | ||
| sysfs.c | ||
| trace.c | ||
| trace.h | ||
| vphb.c | ||