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Matthew Schwartz ec5eccf560 mmc: rtsx_pci_sdmmc: implement sdmmc_card_busy function
commit 1226102201 upstream.

rtsx_pci_sdmmc does not have an sdmmc_card_busy function, so any voltage
switches cause a kernel warning, "mmc0: cannot verify signal voltage
switch."

Copy the sdmmc_card_busy function from rtsx_pci_usb to rtsx_pci_sdmmc to
fix this.

Fixes: ff984e57d3 ("mmc: Add realtek pcie sdmmc host driver")
Signed-off-by: Matthew Schwartz <matthew.schwartz@linux.dev>
Tested-by: Ricky WU <ricky_wu@realtek.com>
Reviewed-by: Ricky WU <ricky_wu@realtek.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-01-30 10:28:45 +01:00
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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 reStructuredText 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.