6.6-stable review patch. If anyone has any objections, please let me know.
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From: Miquel Raynal miquel.raynal@bootlin.com
commit a7d84a2e7663bbe12394cc771107e04668ea313a upstream.
While switching to ref counters for track mtd devices use, the vmu-flash driver was forgotten. The reason for reading the ref counter seems debatable, but let's just fix the build for now.
Fixes: 19bfa9ebebb5 ("mtd: use refcount to prevent corruption") Reported-by: kernel test robot lkp@intel.com Closes: https://lore.kernel.org/oe-kbuild-all/202312022315.79twVRZw-lkp@intel.com/ Cc: stable@vger.kernel.org Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Link: https://lore.kernel.org/linux-mtd/20231205075936.13831-1-miquel.raynal@bootl... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mtd/maps/vmu-flash.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mtd/maps/vmu-flash.c b/drivers/mtd/maps/vmu-flash.c index a7ec947a3ebb..53019d313db7 100644 --- a/drivers/mtd/maps/vmu-flash.c +++ b/drivers/mtd/maps/vmu-flash.c @@ -719,7 +719,7 @@ static int vmu_can_unload(struct maple_device *mdev) card = maple_get_drvdata(mdev); for (x = 0; x < card->partitions; x++) { mtd = &((card->mtd)[x]); - if (mtd->usecount > 0) + if (kref_read(&mtd->refcnt)) return 0; } return 1;