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coresight-tmc-etr: Use vmalloc once kcalloc fail

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Sometimes system doesn't have enough continuous pages for kcalloc.
If kcalloc fail, use vmalloc instead.

Change-Id: Ie0864224f4eeedbd01b301f59b4eb307cc1f8df2
Signed-off-by: Mao Jinlong <jinlmao@codeaurora.org>
This commit is contained in:
Mao Jinlong 2021-08-12 17:30:22 +08:00 • committed by Gerrit - the friendly Code Review server
commit 5e6bbb64ec
1 changed files with 24 additions and 7 deletions
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31
drivers/hwtracing/coresight/coresight-tmc-etr.c
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@ -168,8 +168,15 @@ static void tmc_pages_free(struct tmc_pages *tmc_pages,
__free_page(tmc_pages->pages[i]);
}
kfree(tmc_pages->pages);
kfree(tmc_pages->daddrs);
if (is_vmalloc_addr(tmc_pages->pages))
vfree(tmc_pages->pages);
else
kfree(tmc_pages->pages);
if (is_vmalloc_addr(tmc_pages->daddrs))
vfree(tmc_pages->daddrs);
else
kfree(tmc_pages->daddrs);
tmc_pages->pages = NULL;
tmc_pages->daddrs = NULL;
tmc_pages->nr_pages = 0;
@ -195,14 +202,24 @@ static int tmc_pages_alloc(struct tmc_pages *tmc_pages,
nr_pages = tmc_pages->nr_pages;
tmc_pages->daddrs = kcalloc(nr_pages, sizeof(*tmc_pages->daddrs),
GFP_KERNEL);
if (!tmc_pages->daddrs)
return -ENOMEM;
if (!tmc_pages->daddrs) {
tmc_pages->daddrs = vmalloc(sizeof(*tmc_pages->daddrs) * nr_pages);
if (!tmc_pages->daddrs)
return -ENOMEM;
}
tmc_pages->pages = kcalloc(nr_pages, sizeof(*tmc_pages->pages),
GFP_KERNEL);
if (!tmc_pages->pages) {
kfree(tmc_pages->daddrs);
tmc_pages->daddrs = NULL;
return -ENOMEM;
tmc_pages->pages = vmalloc(sizeof(*tmc_pages->pages) * nr_pages);
if (!tmc_pages->pages) {
if (is_vmalloc_addr(tmc_pages->daddrs))
vfree(tmc_pages->daddrs);
else
kfree(tmc_pages->daddrs);
tmc_pages->daddrs = NULL;
return -ENOMEM;
}
}
for (i = 0; i < nr_pages; i++) {