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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> |
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| .. | ||
| core_intr.c | ||
| core.c | ||
| core.h | ||
| debug.h | ||
| debugfs.c | ||
| drd.c | ||
| gadget.c | ||
| hcd_ddma.c | ||
| hcd_intr.c | ||
| hcd_queue.c | ||
| hcd.c | ||
| hcd.h | ||
| hw.h | ||
| Kconfig | ||
| Makefile | ||
| params.c | ||
| pci.c | ||
| platform.c | ||