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Merge branch 'stable/for-jens-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into for-linus 

Konrad writes:

Please pull in your 'for-linus' branch two little fixes for Xen
block front:

One fix is for handling the XEN_PAGE_SIZE != PAGE_SIZE (4KB vs 64KB
on ARM for example) mishandling while the other is fixing
the accounting for the configuration changes.
This commit is contained in:
Jens Axboe 2017-01-27 11:56:06 -07:00
parent 08965c2eba 3b4f18843e
commit c14024dbb1
1 changed files with 14 additions and 8 deletions
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22
drivers/block/xen-blkfront.c
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@ -197,13 +197,13 @@ struct blkfront_info
/* Number of pages per ring buffer. */
unsigned int nr_ring_pages;
struct request_queue *rq;
unsigned int feature_flush;
unsigned int feature_fua;
unsigned int feature_flush:1;
unsigned int feature_fua:1;
unsigned int feature_discard:1;
unsigned int feature_secdiscard:1;
unsigned int feature_persistent:1;
unsigned int discard_granularity;
unsigned int discard_alignment;
unsigned int feature_persistent:1;
/* Number of 4KB segments handled */
unsigned int max_indirect_segments;
int is_ready;
@ -2223,7 +2223,7 @@ static int blkfront_setup_indirect(struct blkfront_ring_info *rinfo)
}
else
grants = info->max_indirect_segments;
psegs = grants / GRANTS_PER_PSEG;
psegs = DIV_ROUND_UP(grants, GRANTS_PER_PSEG);
err = fill_grant_buffer(rinfo,
(grants + INDIRECT_GREFS(grants)) * BLK_RING_SIZE(info));
@ -2323,13 +2323,16 @@ static void blkfront_gather_backend_features(struct blkfront_info *info)
blkfront_setup_discard(info);
info->feature_persistent =
xenbus_read_unsigned(info->xbdev->otherend,
"feature-persistent", 0);
!!xenbus_read_unsigned(info->xbdev->otherend,
"feature-persistent", 0);
indirect_segments = xenbus_read_unsigned(info->xbdev->otherend,
"feature-max-indirect-segments", 0);
info->max_indirect_segments = min(indirect_segments,
xen_blkif_max_segments);
if (indirect_segments > xen_blkif_max_segments)
indirect_segments = xen_blkif_max_segments;
if (indirect_segments <= BLKIF_MAX_SEGMENTS_PER_REQUEST)
indirect_segments = 0;
info->max_indirect_segments = indirect_segments;
}
/*
@ -2652,6 +2655,9 @@ static int __init xlblk_init(void)
if (!xen_domain())
return -ENODEV;
if (xen_blkif_max_segments < BLKIF_MAX_SEGMENTS_PER_REQUEST)
xen_blkif_max_segments = BLKIF_MAX_SEGMENTS_PER_REQUEST;
if (xen_blkif_max_ring_order > XENBUS_MAX_RING_GRANT_ORDER) {
pr_info("Invalid max_ring_order (%d), will use default max: %d.\n",
xen_blkif_max_ring_order, XENBUS_MAX_RING_GRANT_ORDER);