From eac85fbd0867c25ac517f58fae401d65c627edff Mon Sep 17 00:00:00 2001 From: Matthew Schwartz Date: Sun, 4 Jan 2026 22:02:35 -0800 Subject: mmc: rtsx: reset power state on suspend When rtsx_pci suspends, the card reader hardware powers off but the sdmmc driver's prev_power_state remains as MMC_POWER_ON. This causes sd_power_on to skip reinitialization on the next I/O request, leading to DMA transfer timeouts and errors on resume 20% of the time. Add a power_off slot callback so the PCR can notify the sdmmc driver during suspend. The sdmmc driver resets prev_power_state, and sd_request checks this to reinitialize the card before the next I/O. Signed-off-by: Matthew Schwartz Link: https://patch.msgid.link/20260105060236.400366-2-matthew.schwartz@linux.dev Signed-off-by: Greg Kroah-Hartman --- include/linux/rtsx_common.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/rtsx_common.h b/include/linux/rtsx_common.h index da9c8c6b5d50..f294f478f0c0 100644 --- a/include/linux/rtsx_common.h +++ b/include/linux/rtsx_common.h @@ -32,6 +32,7 @@ struct platform_device; struct rtsx_slot { struct platform_device *p_dev; void (*card_event)(struct platform_device *p_dev); + void (*power_off)(struct platform_device *p_dev); }; #endif -- cgit v1.2.3