]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
usb: dwc3: core: Add shutdown callback for dwc3
authorSandeep Maheswaram <sanm@codeaurora.org>
Wed, 14 Apr 2021 06:03:29 +0000 (11:33 +0530)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 14 Apr 2021 13:58:06 +0000 (15:58 +0200)
commit568262bf5492a9bb2fcc4c204b8d38fd6be64e28
treed5695ca66978e458ffd2fa610a0bc15b913110f1
parente66bbfb0fbbe53ce0144b6715fa0c4c27e3784ae
usb: dwc3: core: Add shutdown callback for dwc3

This patch adds a shutdown callback to USB DWC core driver to ensure that
it is properly shutdown in reboot/shutdown path. This is required
where SMMU address translation is enabled like on SC7180
SoC and few others. If the hardware is still accessing memory after
SMMU translation is disabled as part of SMMU shutdown callback in
system reboot or shutdown path, then IOVAs(I/O virtual address)
which it was using will go on the bus as the physical addresses which
might result in unknown crashes (NoC/interconnect errors).

Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org>
Link: https://lore.kernel.org/r/1618380209-20114-1-git-send-email-sanm@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/dwc3/core.c