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dmaengine: idxd: fix uninit var for alt_drv

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0-day detected uninitialized alt_drv variable in the bind_store() function.
The branch can be taken when device is not idxd device or wq 'struct
device'. Init alt_drv to NULL.

Fixes: 6e7f3ee97b ("dmaengine: idxd: move dsa_drv support to compatible mode")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162689250332.2114335.636367120454420852.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dave Jiang 2021-07-21 11:35:03 -07:00 • committed by Vinod Koul
parent ade8a86b51
commit 568b212646
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/idxd/compat.c
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@ -34,7 +34,7 @@ static ssize_t bind_store(struct device_driver *drv, const char *buf, size_t cou
{ {
struct bus_type *bus = drv->bus; struct bus_type *bus = drv->bus;
struct device *dev; struct device *dev;
struct device_driver *alt_drv; struct device_driver *alt_drv = NULL;
int rc = -ENODEV; int rc = -ENODEV;
struct idxd_dev *idxd_dev; struct idxd_dev *idxd_dev;