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If IRQ occurs between calling devm_request_threaded_irq() and
initializing dwc3_imx->dwc3, then null pointer dereference occurs
since dwc3_imx->dwc3 is used in dwc3_imx8mp_interrupt().
The patch puts registration of the interrupt handler after
initializing of neccesery data.
Found by Linux Driver Verification project (linuxtesting.org).
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Nadezda Lutovinova <lutovinova@ispras.ru>
Link: https://lore.kernel.org/r/20210819154818.18334-1-lutovinova@ispras.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix to return a negative error code from the error handling case instead
of 0, as done elsewhere in this function.
Fixes: 6dd2565989b4 ("usb: dwc3: add imx8mp dwc3 glue layer driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210508015310.1627-1-thunder.leizhen@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
New schema of usb controller DT-node should be named with prefix
"^usb(@.*)?", dt changed the node name, but missed counter part
change in driver, fix it by switching to use compatible string as
the dwc3 core compatible string keeps "snps,dwc3" in all dt.
Fixes: d1689cd3c0f4 ("arm64: dts: imx8mp: Use the correct name for child node "snps, dwc3"")
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Li Jun <jun.li@nxp.com>
Link: https://lore.kernel.org/r/1619765836-20387-1-git-send-email-jun.li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The opening comment mark '/**' is used for highlighting the beginning of
kernel-doc comments.
The header for drivers/usb/dwc3/dwc3-imx8mp.c follows this syntax, but the
content inside does not comply with kernel-doc.
This line was probably not meant for kernel-doc parsing, but is parsed
due to the presence of kernel-doc like comment syntax(i.e, '/**'), which
causes unexpected warning from kernel-doc:
"warning: expecting prototype for dwc3(). Prototype was for USB_WAKEUP_CTRL() instead"
Provide a simple fix by replacing this occurrence with general comment
format, i.e. '/*', to prevent kernel-doc from parsing it.
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
Link: https://lore.kernel.org/r/20210329142604.28737-1-yashsri421@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
imx8mp SoC integrate dwc3 3.30b IP and has some customizations to
support low power, which has a seprated wakeup irq and additional
logic to wakeup usb from low power mode both for host mode and
device mode.
Signed-off-by: Li Jun <jun.li@nxp.com>
Link: https://lore.kernel.org/r/1609241866-9508-3-git-send-email-jun.li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
