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authorLinus Torvalds <torvalds@linux-foundation.org>2015-02-18 20:24:01 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-18 20:24:01 +0300
commit53861af9a17022898619a2ae4ead0dfc601b7c13 (patch)
treedc11088d9e86fa1d8d8479974864153a8f976897 /drivers/block
parent5c2770079fb9b8c5bfb7113d9e76de66e77a0e24 (diff)
parent5b40a7daf51812b35cf05d1601a779a7043f8414 (diff)
downloadlinux-53861af9a17022898619a2ae4ead0dfc601b7c13.tar.xz
Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull virtio updates from Rusty Russell: "OK, this has the big virtio 1.0 implementation, as specified by OASIS. On top of tht is the major rework of lguest, to use PCI and virtio 1.0, to double-check the implementation. Then comes the inevitable fixes and cleanups from that work" * tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (80 commits) virtio: don't set VIRTIO_CONFIG_S_DRIVER_OK twice. virtio_net: unconditionally define struct virtio_net_hdr_v1. tools/lguest: don't use legacy definitions for net device in example launcher. virtio: Don't expose legacy net features when VIRTIO_NET_NO_LEGACY defined. tools/lguest: use common error macros in the example launcher. tools/lguest: give virtqueues names for better error messages tools/lguest: more documentation and checking of virtio 1.0 compliance. lguest: don't look in console features to find emerg_wr. tools/lguest: don't start devices until DRIVER_OK status set. tools/lguest: handle indirect partway through chain. tools/lguest: insert driver references from the 1.0 spec (4.1 Virtio Over PCI) tools/lguest: insert device references from the 1.0 spec (4.1 Virtio Over PCI) tools/lguest: rename virtio_pci_cfg_cap field to match spec. tools/lguest: fix features_accepted logic in example launcher. tools/lguest: handle device reset correctly in example launcher. virtual: Documentation: simplify and generalize paravirt_ops.txt lguest: remove NOTIFY call and eventfd facility. lguest: remove NOTIFY facility from demonstration launcher. lguest: use the PCI console device's emerg_wr for early boot messages. lguest: always put console in PCI slot #1. ...
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/virtio_blk.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index cdfbd21e3597..655e570b9b31 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -28,8 +28,7 @@ struct virtio_blk_vq {
char name[VQ_NAME_LEN];
} ____cacheline_aligned_in_smp;
-struct virtio_blk
-{
+struct virtio_blk {
struct virtio_device *vdev;
/* The disk structure for the kernel. */
@@ -52,8 +51,7 @@ struct virtio_blk
struct virtio_blk_vq *vqs;
};
-struct virtblk_req
-{
+struct virtblk_req {
struct request *req;
struct virtio_blk_outhdr out_hdr;
struct virtio_scsi_inhdr in_hdr;
@@ -575,6 +573,12 @@ static int virtblk_probe(struct virtio_device *vdev)
u16 min_io_size;
u8 physical_block_exp, alignment_offset;
+ if (!vdev->config->get) {
+ dev_err(&vdev->dev, "%s failure: config access disabled\n",
+ __func__);
+ return -EINVAL;
+ }
+
err = ida_simple_get(&vd_index_ida, 0, minor_to_index(1 << MINORBITS),
GFP_KERNEL);
if (err < 0)