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author | Hongyu Xie <xy521521@gmail.com> | 2022-06-23 14:19:42 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-23 17:27:28 +0300 |
commit | a808925075fb750804a60ff0710614466c396db4 (patch) | |
tree | e2caba5ca7576c8a76c00827c298888e9547e007 /drivers/usb/host/ohci-ppc-of.c | |
parent | 2bdc2bcd9a759613d6340c4a0b7f5d3b7a1a71a2 (diff) | |
download | linux-a808925075fb750804a60ff0710614466c396db4.tar.xz |
xhci: Keep interrupt disabled in initialization until host is running.
irq is disabled in xhci_quiesce(called by xhci_halt, with bit:2 cleared
in USBCMD register), but xhci_run(called by usb_add_hcd) re-enable it.
It's possible that you will receive thousands of interrupt requests
after initialization for 2.0 roothub. And you will get a lot of
warning like, "xHCI dying, ignoring interrupt. Shouldn't IRQs be
disabled?". This amount of interrupt requests will cause the entire
system to freeze.
This problem was first found on a device with ASM2142 host controller
on it.
[tidy up old code while moving it, reword header -Mathias]
Cc: stable@kernel.org
Signed-off-by: Hongyu Xie <xiehongyu1@kylinos.cn>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20220623111945.1557702-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ohci-ppc-of.c')
0 files changed, 0 insertions, 0 deletions