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| author | Oliver Neukum <oneukum@suse.com> | 2023-11-15 15:45:07 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-21 15:30:27 +0100 |
| commit | 0583bc776ca5b5a3f5752869fc31cf7322df2b35 (patch) | |
| tree | 44151abe862f1439c83c7427f9a75a5eb65a495a /drivers/usb/dwc3/dwc3-rtk.c | |
| parent | usb: misc: ljca: Drop _ADR support to get ljca children devices (diff) | |
| download | linux-0583bc776ca5b5a3f5752869fc31cf7322df2b35.tar.xz linux-0583bc776ca5b5a3f5752869fc31cf7322df2b35.zip | |
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 <oneukum@suse.com>
Tested-by: Ivan Ivanov <ivan.ivanov@suse.com>
Tested-by: Andrea della Porta <andrea.porta@suse.com>
Link: https://lore.kernel.org/r/20231115144514.15248-1-oneukum@suse.com
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions