diff options
| author | Eric Biggers <ebiggers3@gmail.com> | 2015-12-11 20:09:16 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-07 21:25:50 -0800 |
| commit | d40a09464401265e2894061cca388fb86e05b4be (patch) | |
| tree | 412d786c8f8e1695b8eea3f9e290a05f8a39971f | |
| parent | 0d0ce9c00b866090a69a2d63118b3e09cc71c96d (diff) | |
| download | linux-d40a09464401265e2894061cca388fb86e05b4be.tar.bz2 | |
misc: mic: fix incorrect use of error codes in SCIF DMA driver
The error code passed to ERR_PTR() always should be negated. Also, the
return value of scif_add_mmu_notifier() was never checked.
Signed-off-by: Eric Biggers <ebiggers3@gmail.com>
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/misc/mic/scif/scif_dma.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/drivers/misc/mic/scif/scif_dma.c b/drivers/misc/mic/scif/scif_dma.c index 8804bccf04b6..cd01a0efda6b 100644 --- a/drivers/misc/mic/scif/scif_dma.c +++ b/drivers/misc/mic/scif/scif_dma.c @@ -271,13 +271,10 @@ static struct scif_mmu_notif * scif_find_mmu_notifier(struct mm_struct *mm, struct scif_endpt_rma_info *rma) { struct scif_mmu_notif *mmn; - struct list_head *item; - list_for_each(item, &rma->mmn_list) { - mmn = list_entry(item, struct scif_mmu_notif, list); + list_for_each_entry(mmn, &rma->mmn_list, list) if (mmn->mm == mm) return mmn; - } return NULL; } @@ -288,13 +285,12 @@ scif_add_mmu_notifier(struct mm_struct *mm, struct scif_endpt *ep) = kzalloc(sizeof(*mmn), GFP_KERNEL); if (!mmn) - return ERR_PTR(ENOMEM); + return ERR_PTR(-ENOMEM); scif_init_mmu_notifier(mmn, current->mm, ep); - if (mmu_notifier_register(&mmn->ep_mmu_notifier, - current->mm)) { + if (mmu_notifier_register(&mmn->ep_mmu_notifier, current->mm)) { kfree(mmn); - return ERR_PTR(EBUSY); + return ERR_PTR(-EBUSY); } list_add(&mmn->list, &ep->rma_info.mmn_list); return mmn; @@ -1725,7 +1721,7 @@ static int scif_rma_copy(scif_epd_t epd, off_t loffset, unsigned long addr, mutex_lock(&ep->rma_info.mmn_lock); mmn = scif_find_mmu_notifier(current->mm, &ep->rma_info); if (!mmn) - scif_add_mmu_notifier(current->mm, ep); + mmn = scif_add_mmu_notifier(current->mm, ep); mutex_unlock(&ep->rma_info.mmn_lock); if (IS_ERR(mmn)) { scif_put_peer_dev(spdev); |