diff options
| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2020-03-17 07:22:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-18 11:28:22 +0100 |
| commit | 397c7729665a3b07a7b4ce7215173df8e9112809 (patch) | |
| tree | 9082399528a036e08dd7bd5116e5fb4e060ea147 /drivers/hwtracing/intel_th/pci.c | |
| parent | tty: reorganize tty & serial menus (diff) | |
| download | linux-397c7729665a3b07a7b4ce7215173df8e9112809.tar.xz linux-397c7729665a3b07a7b4ce7215173df8e9112809.zip | |
intel_th: Disallow multi mode on devices where it's broken
Some versions of Intel TH have an issue that prevents the multi mode of
MSU from working correctly, resulting in no trace data and potentially
stuck MSU pipeline.
Disable multi mode on such devices.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200317062215.15598-2-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/intel_th/pci.c')
| -rw-r--r-- | drivers/hwtracing/intel_th/pci.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/hwtracing/intel_th/pci.c b/drivers/hwtracing/intel_th/pci.c index e9d90b53bbc4..ad7e51ebe49e 100644 --- a/drivers/hwtracing/intel_th/pci.c +++ b/drivers/hwtracing/intel_th/pci.c @@ -120,6 +120,10 @@ static void intel_th_pci_remove(struct pci_dev *pdev) pci_free_irq_vectors(pdev); } +static const struct intel_th_drvdata intel_th_1x_multi_is_broken = { + .multi_is_broken = 1, +}; + static const struct intel_th_drvdata intel_th_2x = { .tscu_enable = 1, .has_mintctl = 1, @@ -152,7 +156,7 @@ static const struct pci_device_id intel_th_pci_id_table[] = { { /* Kaby Lake PCH-H */ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa2a6), - .driver_data = (kernel_ulong_t)0, + .driver_data = (kernel_ulong_t)&intel_th_1x_multi_is_broken, }, { /* Denverton */ @@ -207,7 +211,7 @@ static const struct pci_device_id intel_th_pci_id_table[] = { { /* Comet Lake PCH-V */ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa3a6), - .driver_data = (kernel_ulong_t)&intel_th_2x, + .driver_data = (kernel_ulong_t)&intel_th_1x_multi_is_broken, }, { /* Ice Lake NNPI */ |