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c2f07cb7e3
commit 1208f9e1d758c991b0a46a1bd60c616b906bbe27 upstream. Renesas R-Car H3ULCB + Kingfisher Infotainment Board is either not able to detect the USB3.0 mass storage devices or is detecting those as USB2.0 high speed devices. The explanation given by Renesas is that, due to a HW issue, the XHCI driver does not wake up after going to sleep on connecting a USB3.0 device. In order to mitigate that, disable the auto-suspend feature specifically for SMSC hubs from hub_probe() function, as a quirk. Renesas Kingfisher Infotainment Board has two USB3.0 ports (CN2) which are connected via USB5534B 4-port SuperSpeed/Hi-Speed, low-power, configurable hub controller. [1] SanDisk USB 3.0 device detected as USB-2.0 before the patch [ 74.036390] usb 5-1.1: new high-speed USB device number 4 using xhci-hcd [ 74.061598] usb 5-1.1: New USB device found, idVendor=0781, idProduct=5581, bcdDevice= 1.00 [ 74.069976] usb 5-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 74.077303] usb 5-1.1: Product: Ultra [ 74.080980] usb 5-1.1: Manufacturer: SanDisk [ 74.085263] usb 5-1.1: SerialNumber: 4C530001110208116550 [2] SanDisk USB 3.0 device detected as USB-3.0 after the patch [ 34.565078] usb 6-1.1: new SuperSpeed Gen 1 USB device number 3 using xhci-hcd [ 34.588719] usb 6-1.1: New USB device found, idVendor=0781, idProduct=5581, bcdDevice= 1.00 [ 34.597098] usb 6-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 34.604430] usb 6-1.1: Product: Ultra [ 34.608110] usb 6-1.1: Manufacturer: SanDisk [ 34.612397] usb 6-1.1: SerialNumber: 4C530001110208116550 Suggested-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Hardik Gajjar <hgajjar@de.adit-jv.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Eugeniu Rosca <erosca@de.adit-jv.com> Cc: stable <stable@vger.kernel.org> Link: https://lore.kernel.org/r/1580989763-32291-1-git-send-email-hgajjar@de.adit-jv.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.