From 8f0045914642dc58a0b9dac251726d909324b3b4 Mon Sep 17 00:00:00 2001 From: Javier Date: Sun, 1 Nov 2026 16:10:29 +0100 Subject: linux: powerdown device on module removal --- linux/chudisk.c | 21 ++++++++++++++++----- linux/makefile | 2 +- 2 files changed, 17 insertions(+), 6 deletions(-) (limited to 'linux') diff --git a/linux/chudisk.c b/linux/chudisk.c index c2eb2f7..f50551c 100644 --- a/linux/chudisk.c +++ b/linux/chudisk.c @@ -48,6 +48,7 @@ static int softblk = 1024; #include "lnxabs.h" #include "ch375lnx.h" +#include #include #if ENABLE_DLOG @@ -565,7 +566,8 @@ static __init int chudisk_init(void) return -ENXIO; } - printk(KERN_INFO "chudisk: found CH375 v.%x at 0x%hx, using major %d\n", + printk(KERN_INFO "chudisk: v%x.%x, found CH375 v.%x at 0x%hx, using major %d\n", + CHUDISK_VERSION_MAJOR, CHUDISK_VERSION_MINOR, ch375_get_version(dev), dev->io_base, MAJOR_NR); // Set defaults for unit @@ -584,6 +586,7 @@ static __init int chudisk_init(void) blksize_size[MAJOR_NR] = chudisk_blksizes; hardsect_size[MAJOR_NR] = chudisk_hardsectsizes; + // Add ourselves to the genhd linked list chudisk_gendisk.major = MAJOR_NR; chudisk_gendisk.nr_real = 1; chudisk_gendisk.next = gendisk_head; @@ -596,11 +599,10 @@ static __init int chudisk_init(void) static void chudisk_exit(void) { + struct ch375 *dev = &chudisk_dev[0]; struct gendisk **gdp; - unregister_blkdev(MAJOR_NR, "chud"); - release_region(io, 2); - + // Remove from genhd list for(gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next)) { if (*gdp == &chudisk_gendisk) { *gdp = (*gdp)->next; @@ -608,14 +610,23 @@ static void chudisk_exit(void) } } + // Remove from blkdev blk_dev[MAJOR_NR].request_fn = NULL; blk_size[MAJOR_NR] = NULL; blksize_size[MAJOR_NR] = NULL; hardsect_size[MAJOR_NR] = NULL; + unregister_blkdev(MAJOR_NR, "chud"); + + // Turn off the chip + ch375_set_usb_mode(dev, CH375_USB_MODE_HOST_DISABLED); + mdelay(1); + ch375_enter_sleep(dev); + + // And unregister driver + release_region(io, 2); dprintf("chudisk: bye\n"); } - module_init(chudisk_init); module_exit(chudisk_exit); diff --git a/linux/makefile b/linux/makefile index e88ebac..9e07d27 100644 --- a/linux/makefile +++ b/linux/makefile @@ -19,7 +19,7 @@ clean: install: chudisk.o install -m0644 chudisk.o $(MODDIR)/block - depmod + depmod -a uninstall: rm -f $(MODDIR)/block/chudisk.o -- cgit v1.2.3