This is a note to let you know that I've just added the patch titled irda: vlsi_ir: fix check for DMA mapping errors to the 4.4-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: irda-vlsi_ir-fix-check-for-dma-mapping-errors.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Thu Dec 21 10:35:49 CET 2017 From: Alexey Khoroshilov <khoroshilov@xxxxxxxxx> Date: Sat, 25 Mar 2017 01:48:08 +0300 Subject: irda: vlsi_ir: fix check for DMA mapping errors From: Alexey Khoroshilov <khoroshilov@xxxxxxxxx> [ Upstream commit 6ac3b77a6ffff7513ff86b684aa256ea01c0e5b5 ] vlsi_alloc_ring() checks for DMA mapping errors by comparing returned address with zero, while pci_dma_mapping_error() should be used. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/irda/vlsi_ir.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/drivers/net/irda/vlsi_ir.c +++ b/drivers/net/irda/vlsi_ir.c @@ -418,8 +418,9 @@ static struct vlsi_ring *vlsi_alloc_ring memset(rd, 0, sizeof(*rd)); rd->hw = hwmap + i; rd->buf = kmalloc(len, GFP_KERNEL|GFP_DMA); - if (rd->buf == NULL || - !(busaddr = pci_map_single(pdev, rd->buf, len, dir))) { + if (rd->buf) + busaddr = pci_map_single(pdev, rd->buf, len, dir); + if (rd->buf == NULL || pci_dma_mapping_error(pdev, busaddr)) { if (rd->buf) { net_err_ratelimited("%s: failed to create PCI-MAP for %p\n", __func__, rd->buf); @@ -430,8 +431,7 @@ static struct vlsi_ring *vlsi_alloc_ring rd = r->rd + j; busaddr = rd_get_addr(rd); rd_set_addr_status(rd, 0, 0); - if (busaddr) - pci_unmap_single(pdev, busaddr, len, dir); + pci_unmap_single(pdev, busaddr, len, dir); kfree(rd->buf); rd->buf = NULL; } Patches currently in stable-queue which might be from khoroshilov@xxxxxxxxx are queue-4.4/irda-vlsi_ir-fix-check-for-dma-mapping-errors.patch