Merge tag 'for-5.2/dm-fix-1' of... (86f9e56d) · Commits · 戴 / test

Merge tag 'for-5.2/dm-fix-1' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper fix from Mike Snitzer: "Fix a particularly glaring oversight in a DM core commit from 5.1 that doesn't properly trim special IOs (e.g. discards) relative to corresponding target's max_io_len_target_boundary()" * tag 'for-5.2/dm-fix-1' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm: make sure to obey max_io_len_target_boundary

drivers/md/dm.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1469,7 +1469,7 @@ static unsigned get_num_write_zeroes_bios(struct dm_target *ti)
		static int __send_changing_extent_only(struct clone_info ci, struct dm_target ti,
		unsigned num_bios)
		{
		unsigned len = ci->sector_count;
		unsigned len;

		/*
		* Even though the device advertised support for this type of
		@@ -1480,6 +1480,8 @@ static int __send_changing_extent_only(struct clone_info ci, struct dm_target
		if (!num_bios)
		return -EOPNOTSUPP;

		len = min((sector_t)ci->sector_count, max_io_len_target_boundary(ci->sector, ti));

		__send_duplicate_bios(ci, ti, num_bios, &len);

		ci->sector += len;