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firmware: Free temporary page table after vmapping

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Once after performing vmap() to map the S/G pages, our own page table
becomes superfluous since the pages can be released via vfree()
automatically.  Let's change the buffer release code and discard the
page table array for saving some memory.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai
2019-05-20 11:26:43 +02:00
committed by Greg Kroah-Hartman
parent 64ae0e71c6
commit ddaf29fd9b
2 changed files with 9 additions and 4 deletions
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6
drivers/base/firmware_loader/main.c
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@@ -252,13 +252,13 @@ static void __free_fw_priv(struct kref *ref)
spin_unlock(&fwc->lock);
#ifdef CONFIG_FW_LOADER_USER_HELPER
if (fw_priv->is_paged_buf) {
if (fw_priv->pages) {
/* free leftover pages */
int i;
vunmap(fw_priv->data);
for (i = 0; i < fw_priv->nr_pages; i++)
__free_page(fw_priv->pages[i]);
vfree(fw_priv->pages);
} else
}
#endif
if (!fw_priv->allocated_size)
vfree(fw_priv->data);