diff options
| author | Oliver Neukum <[email protected]> | 2023-11-15 15:45:07 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2023-11-21 15:30:27 +0100 |
| commit | 0583bc776ca5b5a3f5752869fc31cf7322df2b35 (patch) | |
| tree | 44151abe862f1439c83c7427f9a75a5eb65a495a /scripts/generate_rust_analyzer.py | |
| parent | 30ce1c03a083c9dc131d09d28ba1bcaafa3d8df2 (diff) | |
USB: dwc2: write HCINT with INTMASK applied
dwc2_hc_n_intr() writes back INTMASK as read but evaluates it
with intmask applied. In stress testing this causes spurious
interrupts like this:
[Mon Aug 14 10:51:07 2023] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 7 - ChHltd set, but reason is unknown
[Mon Aug 14 10:51:07 2023] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600001
[Mon Aug 14 10:51:08 2023] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 0 - ChHltd set, but reason is unknown
[Mon Aug 14 10:51:08 2023] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600001
[Mon Aug 14 10:51:08 2023] dwc2 3f980000.usb: dwc2_hc_chhltd_intr_dma: Channel 4 - ChHltd set, but reason is unknown
[Mon Aug 14 10:51:08 2023] dwc2 3f980000.usb: hcint 0x00000002, intsts 0x04600001
[Mon Aug 14 10:51:08 2023] dwc2 3f980000.usb: dwc2_update_urb_state_abn(): trimming xfer length
Applying INTMASK prevents this. The issue exists in all versions of the
driver.
Signed-off-by: Oliver Neukum <[email protected]>
Tested-by: Ivan Ivanov <[email protected]>
Tested-by: Andrea della Porta <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Cc: stable <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'scripts/generate_rust_analyzer.py')
0 files changed, 0 insertions, 0 deletions