linux-toradex.git/drivers/lightnvm/gennvm.c, branch v4.4.114

lightnvm: fix incorrect nr_free_blocks stat

2016-09-15T06:27:40+00:00

[ Upstream commit bdded1552085b12d23c9be76147d2e96647a098f ]

When initing bad block list in gennvm_block_bb, once we move bad block
from free_list to bb_list, we should maintain both stat info
nr_free_blocks and nr_bad_blocks. So this patch fixes to add missing
operation related to nr_free_blocks.

Signed-off-by: Chao Yu 
Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

lightnvm: fix bio submission issue

2016-09-15T06:27:39+00:00

[ Upstream commit 3cd485b1f8e25a6534eb4c542e7eba1b944fbaaf ]

Put bio when submission fails, since we get it
before submission. And return error when backend
device driver doesn't provide a submit_io method,
thus we can end IO properly.

Signed-off-by: Wenwei Tao 
Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

lightnvm: wrong offset in bad blk lun calculation

2015-12-29T15:28:32+00:00

dev->nr_luns reports the total number of luns available in a device
while dev->luns_per_chnl is the number of luns per channel.

When multiple channels are available, the offset is calculated from a
channel and lun id into a linear array. As it multiplies with
the total number of luns, we go out of bound when channel id > 0 and
causes the kernel to panic when we read a protected kernel memory area.

Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe

lightnvm: prevent gennvm module unload on use

2015-12-07T16:14:19+00:00

After the gennvm module has been initialized. It might be attached to
one or several devices. In that case, the module is in use. Make sure
that it can not be unloaded.

Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe

lightnvm: replace req queue with nvmdev for lld

2015-12-07T16:14:19+00:00

In the case where a request queue is passed to the low lever lightnvm
device drive integration, the device driver might pass its admin
commands through another queue. Instead pass nvm_dev, and let the
low level drive the appropriate queue.

Reported-by: Christoph Hellwig 
Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe

lightnvm: refactor spin_unlock in gennvm_get_blk

2015-12-07T16:14:19+00:00

The spin_unlock is duplicated multiple times. Jump to a single unlock
to improve the code flow.

Signed-off-by: Wenwei Tao 
Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe

lightnvm: unconverted ppa returned in get_bb_tbl

2015-11-29T21:34:58+00:00

The get_bb_tbl function takes ppa as a generic address, which is
converted to the ppa device address within the device driver. When
the update_bbtbl callback is called from get_bb_tbl, the device
specific ppa is used, instead of the generic ppa.

Make sure to pass the generic ppa.

Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe

lightnvm: free memory when gennvm register fails

2015-11-29T21:34:57+00:00

free allocated nvm block and gennvm lun structures when
gennvm register fails, otherwise it will cause memory leak.

Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe

lightnvm: add free and bad lun info to show luns

2015-11-20T15:33:21+00:00

Add free block, used block, and bad block information to the show debug
interface. This information is used to debug how targets track blocks.

Also, change debug function name to make it more generic.

Signed-off-by: Javier Gonzalez 
Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe

lightnvm: keep track of block counts

2015-11-20T15:33:20+00:00

Maintain number of in use blocks, free blocks, and bad blocks in a per
lun basis. This allows the upper layers to get information about the
state of each lun.

Also, account for blocks reserved to the device on the free block count.
nr_free_blocks matches now the actual number of blocks on the free list
when the device is booted.

Signed-off-by: Javier Gonzalez 
Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe