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| author | Jens Axboe <axboe@fb.com> | 2014-05-28 22:37:04 +0400 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-05-28 22:37:04 +0400 |
| commit | 879466e6a53ce063fa779476cf648abafcd703a9 (patch) | |
| tree | dc0827609f020f237cd201b8e0345bdef2b17190 /drivers/block/xen-blkfront.c | |
| parent | 0fb662e2250afdf2c54253dbf2063dc9d8369b69 (diff) | |
| parent | 814d04e7dfc4a9cf7e36656afe2da5c0c08dde2b (diff) | |
| download | linux-879466e6a53ce063fa779476cf648abafcd703a9.tar.xz | |
Merge branch 'stable/for-jens-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip into for-3.16/drivers
Konrad writes:
Please git pull the following branch:
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git stable/for-jens-3.16
which has a bunch of fixes to the Xen block frontend and backend driver
and a new parameter for Xen backend driver - an override (set by the toolstack)
whether to expose the discard support (if disk of course supports it) or not.
Diffstat (limited to 'drivers/block/xen-blkfront.c')
| -rw-r--r-- | drivers/block/xen-blkfront.c | 40 |
1 files changed, 14 insertions, 26 deletions
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 283a30e88287..5deb235bd18f 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -1635,36 +1635,24 @@ blkfront_closing(struct blkfront_info *info) static void blkfront_setup_discard(struct blkfront_info *info) { int err; - char *type; unsigned int discard_granularity; unsigned int discard_alignment; unsigned int discard_secure; - type = xenbus_read(XBT_NIL, info->xbdev->otherend, "type", NULL); - if (IS_ERR(type)) - return; - - info->feature_secdiscard = 0; - if (strncmp(type, "phy", 3) == 0) { - err = xenbus_gather(XBT_NIL, info->xbdev->otherend, - "discard-granularity", "%u", &discard_granularity, - "discard-alignment", "%u", &discard_alignment, - NULL); - if (!err) { - info->feature_discard = 1; - info->discard_granularity = discard_granularity; - info->discard_alignment = discard_alignment; - } - err = xenbus_gather(XBT_NIL, info->xbdev->otherend, - "discard-secure", "%d", &discard_secure, - NULL); - if (!err) - info->feature_secdiscard = discard_secure; - - } else if (strncmp(type, "file", 4) == 0) - info->feature_discard = 1; - - kfree(type); + info->feature_discard = 1; + err = xenbus_gather(XBT_NIL, info->xbdev->otherend, + "discard-granularity", "%u", &discard_granularity, + "discard-alignment", "%u", &discard_alignment, + NULL); + if (!err) { + info->discard_granularity = discard_granularity; + info->discard_alignment = discard_alignment; + } + err = xenbus_gather(XBT_NIL, info->xbdev->otherend, + "discard-secure", "%d", &discard_secure, + NULL); + if (!err) + info->feature_secdiscard = !!discard_secure; } static int blkfront_setup_indirect(struct blkfront_info *info) |