This is a note to let you know that I've just added the patch titled libnvdimm: fix clear length of nvdimm_forget_poison() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: libnvdimm-fix-clear-length-of-nvdimm_forget_poison.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 8d13c0290655b883df9083a2a0af0d782bc38aef Mon Sep 17 00:00:00 2001 From: Toshi Kani <toshi.kani@xxxxxxx> Date: Thu, 27 Apr 2017 16:57:05 -0600 Subject: libnvdimm: fix clear length of nvdimm_forget_poison() From: Toshi Kani <toshi.kani@xxxxxxx> commit 8d13c0290655b883df9083a2a0af0d782bc38aef upstream. ND_CMD_CLEAR_ERROR command returns 'clear_err.cleared', the length of error actually cleared, which may be smaller than its requested 'len'. Change nvdimm_clear_poison() to call nvdimm_forget_poison() with 'clear_err.cleared' when this value is valid. Fixes: e046114af5fc ("libnvdimm: clear the internal poison_list when clearing badblocks") Cc: Dave Jiang <dave.jiang@xxxxxxxxx> Cc: Vishal Verma <vishal.l.verma@xxxxxxxxx> Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/nvdimm/bus.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -218,7 +218,10 @@ long nvdimm_clear_poison(struct device * if (cmd_rc < 0) return cmd_rc; - nvdimm_clear_from_poison_list(nvdimm_bus, phys, len); + if (clear_err.cleared > 0) + nvdimm_clear_from_poison_list(nvdimm_bus, phys, + clear_err.cleared); + return clear_err.cleared; } EXPORT_SYMBOL_GPL(nvdimm_clear_poison); Patches currently in stable-queue which might be from toshi.kani@xxxxxxx are queue-4.9/libnvdimm-fix-clear-length-of-nvdimm_forget_poison.patch