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[SCSI] mpt2sas: add missing allocation check 

The __get_free_pages can fail, so the return value should be checked.
Spotted thanks to Stanislaw.

Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Acked-by: "Nandigama, Nagalakshmi" <Nagalakshmi.Nandigama@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Tomas Henzl 2012-02-13 18:29:58 +01:00 committed by James Bottomley
parent cf3059a129
commit c834b1c4ec
1 changed files with 5 additions and 0 deletions
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5
drivers/scsi/mpt2sas/mpt2sas_base.c
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@ -2575,6 +2575,11 @@ _base_allocate_memory_pools(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
ioc->chain_lookup = (struct chain_tracker *)__get_free_pages(
GFP_KERNEL, ioc->chain_pages);
if (!ioc->chain_lookup) {
printk(MPT2SAS_ERR_FMT "chain_lookup: get_free_pages failed, "
"sz(%d)\n", ioc->name, (int)sz);
goto out;
}
ioc->chain_dma_pool = pci_pool_create("chain pool", ioc->pdev,
ioc->request_sz, 16, 0);
if (!ioc->chain_dma_pool) {