block: setup bounce bio_sets properly
We're only setting up the bounce bio sets if we happen to need bouncing for regular HIGHMEM, not if we only need it for ISA devices. Protect the ISA bounce setup with a mutex, since it's being invoked from driver init functions and can thus be called in parallel. Cc: stable@vger.kernel.org Reported-by: Ondrej Zary <linux@rainbow-software.org> Tested-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
parent
d459d853c2
commit
52990a5fb0
|
@ -31,6 +31,24 @@
|
|||
static struct bio_set bounce_bio_set, bounce_bio_split;
|
||||
static mempool_t page_pool, isa_page_pool;
|
||||
|
||||
static void init_bounce_bioset(void)
|
||||
{
|
||||
static bool bounce_bs_setup;
|
||||
int ret;
|
||||
|
||||
if (bounce_bs_setup)
|
||||
return;
|
||||
|
||||
ret = bioset_init(&bounce_bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS);
|
||||
BUG_ON(ret);
|
||||
if (bioset_integrity_create(&bounce_bio_set, BIO_POOL_SIZE))
|
||||
BUG_ON(1);
|
||||
|
||||
ret = bioset_init(&bounce_bio_split, BIO_POOL_SIZE, 0, 0);
|
||||
BUG_ON(ret);
|
||||
bounce_bs_setup = true;
|
||||
}
|
||||
|
||||
#if defined(CONFIG_HIGHMEM)
|
||||
static __init int init_emergency_pool(void)
|
||||
{
|
||||
|
@ -44,14 +62,7 @@ static __init int init_emergency_pool(void)
|
|||
BUG_ON(ret);
|
||||
pr_info("pool size: %d pages\n", POOL_SIZE);
|
||||
|
||||
ret = bioset_init(&bounce_bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS);
|
||||
BUG_ON(ret);
|
||||
if (bioset_integrity_create(&bounce_bio_set, BIO_POOL_SIZE))
|
||||
BUG_ON(1);
|
||||
|
||||
ret = bioset_init(&bounce_bio_split, BIO_POOL_SIZE, 0, 0);
|
||||
BUG_ON(ret);
|
||||
|
||||
init_bounce_bioset();
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
@ -86,6 +97,8 @@ static void *mempool_alloc_pages_isa(gfp_t gfp_mask, void *data)
|
|||
return mempool_alloc_pages(gfp_mask | GFP_DMA, data);
|
||||
}
|
||||
|
||||
static DEFINE_MUTEX(isa_mutex);
|
||||
|
||||
/*
|
||||
* gets called "every" time someone init's a queue with BLK_BOUNCE_ISA
|
||||
* as the max address, so check if the pool has already been created.
|
||||
|
@ -94,14 +107,20 @@ int init_emergency_isa_pool(void)
|
|||
{
|
||||
int ret;
|
||||
|
||||
if (mempool_initialized(&isa_page_pool))
|
||||
mutex_lock(&isa_mutex);
|
||||
|
||||
if (mempool_initialized(&isa_page_pool)) {
|
||||
mutex_unlock(&isa_mutex);
|
||||
return 0;
|
||||
}
|
||||
|
||||
ret = mempool_init(&isa_page_pool, ISA_POOL_SIZE, mempool_alloc_pages_isa,
|
||||
mempool_free_pages, (void *) 0);
|
||||
BUG_ON(ret);
|
||||
|
||||
pr_info("isa pool size: %d pages\n", ISA_POOL_SIZE);
|
||||
init_bounce_bioset();
|
||||
mutex_unlock(&isa_mutex);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue