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| author | Benjamin Rood <benjaminjrood@gmail.com> | 2015-10-30 15:53:31 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2015-11-03 05:41:13 +0100 |
| commit | c913df3f3d6f7f5e5ed845e2786b0fc98a41482f (patch) | |
| tree | 77853d04ac0b614607ba052bc6f037d4db16bda9 /Documentation/atomic_ops.txt | |
| parent | pm80xx: wait a minimum of 500ms before issuing commands to SPCv (diff) | |
| download | linux-c913df3f3d6f7f5e5ed845e2786b0fc98a41482f.tar.xz linux-c913df3f3d6f7f5e5ed845e2786b0fc98a41482f.zip | |
pm80xx: avoid a panic if MSI(X) interrupts are disabled
If MSI(X) interrupts are disabled via the kernel command line
(pci=nomsi), the pm8001 driver will kernel panic because it does not
detect that MSI interrupts are disabled and will soldier on and attempt to
configure MSI interrupts anyways. This leads to a kernel panic, most
likely because a required data structure is not available down the
line. Using the pci_msi_enabled() function in order to detect if MSI
interrupts are enabled before configuring them resolves this issue and
avoids a kernel panic when the module is loaded. Additionally, the
irq_vector structure must be initialized when legacy interrupts are
being used otherwise legacy interrupts will simply not function and
result in another panic.
Signed-off-by: Benjamin Rood <brood@attotech.com>
Reviewed-by: Jack Wang <jinpu.wang@profitbricks.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'Documentation/atomic_ops.txt')
0 files changed, 0 insertions, 0 deletions