kernel/linux.git/drivers/mmc/host, branch v5.15.210

mmc: sdhci-of-dwcmshc: Disable clock before DLL configuration

2026-06-19T11:33:42+00:00

[ Upstream commit 6546a49bbe656981d99a389195560999058c89c4 ] According to the ASIC design recommendations, the clock must be disabled before operating the DLL to prevent glitches that could affect the internal digital logic. In extreme cases, failing to do so may cause the controller to malfunction completely. Adds a step to disable the clock before DLL configuration and re-enables it at the end. Fixes: 08f3dff799d4 ("mmc: sdhci-of-dwcmshc: add rockchip platform support") Cc: stable@vger.kernel.org Signed-off-by: Shawn Lin Acked-by: Adrian Hunter Signed-off-by: Ulf Hansson [ dropped HS200/HS400 block and BIT(4) line, converted the single `return` in `if (clock <= 400000)` to `goto enable_clk` ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

mmc: sdhci: add signal voltage switch in sdhci_resume_host

2026-06-19T11:33:38+00:00

commit f595e8e77a51eee35e331f69321766593a845ef2 upstream. I met one suspend/resume issue with sdr104 capable sdio wifi card (with "keep-power-in-suspend" set in DT property): After resuming from suspend to ram, the sdio wifi card stops working. Further debug shows that although ios shows the sdio card is at sdr104 mode, the voltage is still at 3V3. This is due to missing the calling of ->start_signal_voltage_switch() in sdhci_resume_host(). Fix this issue by adding ->start_signal_voltage_switch() in sdhci_resume_host(). This also matches what we do for sdhci_runtime_resume_host(). Then the question is: why this issue hasn't reported and fixed for so long time. IMHO, several reasons: Some host controllers just kick off the runtime resume for system resume, so they benefit from the well supported runtime pm code; Some platforms just use the old sdio wifi card which doesn't need signal voltage switch at all, the default voltage is 3v3 after resuming. Fixes: 6308d2905bd3 ("mmc: sdhci: add quirk for keeping card power during suspend") Signed-off-by: Jisheng Zhang Acked-by: Adrian Hunter Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

mmc: renesas_sdhi: Add OF entry for RZ/G2H SoC

2026-06-19T11:33:38+00:00

commit f48ee49726ee4ab545fd2dc644f169c0809b19b3 upstream. The RZ/G2H (R8A774E1) SoC was previously handled via the generic "renesas,rcar-gen3-sdhi" fallback compatible string. However, because the SDHI IP on RZ/G2H is identical with the R-Car H3-N (R8A77951), it requires the specific quirks and configuration defined in `of_r8a7795_compatible` rather than the generic Gen3 data. Add the explicit "renesas,sdhi-r8a774e1" match entry to map it correctly. Note that the DT binding file renesas,sdhi.yaml does not need an update as the entry for this SoC is already present. Fixes: 31941342888d ("arm64: dts: renesas: r8a774e1: Add SDHI nodes") Cc: stable@vger.kernel.org Signed-off-by: Lad Prabhakar Reviewed-by: Wolfram Sang Reviewed-by: Geert Uytterhoeven Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

mmc: vub300: fix NULL-deref on disconnect

2026-04-18T08:33:37+00:00

commit dff34ef879c5e73298443956a8b391311ba78d57 upstream. Make sure to deregister the controller before dropping the reference to the driver data on disconnect to avoid NULL-pointer dereferences or use-after-free. Fixes: 88095e7b473a ("mmc: Add new VUB300 USB-to-SD/SDIO/MMC driver") Cc: stable@vger.kernel.org # 3.0+ Signed-off-by: Johan Hovold Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

mmc: sdhci: fix timing selection for 1-bit bus width

2026-04-18T08:33:17+00:00

commit 5e3486e64094c28a526543f1e8aa0d5964b7f02d upstream. When 1-bit bus width is used with HS200/HS400 capabilities set, mmc_select_hs200() returns 0 without actually switching. This causes mmc_select_timing() to skip mmc_select_hs(), leaving eMMC in legacy mode (26MHz) instead of High Speed SDR (52MHz). Per JEDEC eMMC spec section 5.3.2, 1-bit mode supports High Speed SDR. Drop incompatible HS200/HS400/UHS/DDR caps early so timing selection falls through to mmc_select_hs() correctly. Fixes: f2119df6b764 ("mmc: sd: add support for signal voltage switch procedure") Signed-off-by: Luke Wang Acked-by: Adrian Hunter Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

mmc: sdhci-pci-gli: fix GL9750 DMA write corruption

2026-04-18T08:33:17+00:00

commit 2b76e0cc7803e5ab561c875edaba7f6bbd87fbb0 upstream. The GL9750 SD host controller has intermittent data corruption during DMA write operations. The GM_BURST register's R_OSRC_Lmt field (bits 17:16), which limits outstanding DMA read requests from system memory, is not being cleared during initialization. The Windows driver sets R_OSRC_Lmt to zero, limiting requests to the smallest unit. Clear R_OSRC_Lmt to match the Windows driver behavior. This eliminates write corruption verified with f3write/f3read tests while maintaining DMA performance. Cc: stable@vger.kernel.org Fixes: e51df6ce668a ("mmc: host: sdhci-pci: Add Genesys Logic GL975x support") Closes: https://lore.kernel.org/linux-mmc/33d12807-5c72-41ce-8679-57aa11831fad@linux.dev/ Acked-by: Adrian Hunter Signed-off-by: Matthew Schwartz Reviewed-by: Ben Chuang Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

mmc: mmci: Fix device_node reference leak in of_get_dml_pipe_index()

2026-04-18T08:33:14+00:00

commit af12e64ae0661546e8b4f5d30d55c5f53a11efe7 upstream. When calling of_parse_phandle_with_args(), the caller is responsible to call of_node_put() to release the reference of device node. In of_get_dml_pipe_index(), it does not release the reference. Fixes: 9cb15142d0e3 ("mmc: mmci: Add qcom dml support to the driver.") Signed-off-by: Felix Gu Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

Revert "mmc: rtsx_pci_sdmmc: increase power-on settling delay to 5ms"

2026-03-04T12:19:46+00:00

[ Upstream commit ff112f1ecd10b72004eac05bae395e1c65f0c63c ] This reverts commit aced969e9bf3701dc75cfca57c78c031b7875b9d. It was determined that this was not the correct "fix", so should be reverted. Fixes: aced969e9bf3 ("mmc: rtsx_pci_sdmmc: increase power-on settling delay to 5ms") Cc: Matthew Schwartz Cc: Ulf Hansson Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

mmc: rtsx_pci_sdmmc: increase power-on settling delay to 5ms

2026-03-04T12:19:46+00:00

[ Upstream commit aced969e9bf3701dc75cfca57c78c031b7875b9d ] The existing 1ms delay in sd_power_on is insufficient and causes resume errors around 4% of the time. Increasing the delay to 5ms resolves this issue after testing 300 s2idle cycles. Fixes: 1f311c94aabd ("mmc: rtsx: add 74 Clocks in power on flow") Signed-off-by: Matthew Schwartz Link: https://patch.msgid.link/20260105060236.400366-3-matthew.schwartz@linux.dev Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

mmc: rtsx_pci_sdmmc: implement sdmmc_card_busy function

2026-02-06T15:41:56+00:00

commit 122610220134b32c742cc056eaf64f7017ac8cd9 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: ff984e57d36e ("mmc: Add realtek pcie sdmmc host driver") Signed-off-by: Matthew Schwartz Tested-by: Ricky WU Reviewed-by: Ricky WU Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman