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scsicam: Fix use of page cache

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Convert scsicam to use a folio instead of a page.  There is no need to
check the error flag here; read_cache_folio() will return -EIO if the
folio cannot be read correctly.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-02-09 12:58:22 -05:00
parent 379c726545
commit 5fb9bfe01c
1 changed files with 5 additions and 6 deletions
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11
drivers/scsi/scsicam.c
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@ -34,15 +34,14 @@ unsigned char *scsi_bios_ptable(struct block_device *dev)
{
struct address_space *mapping = bdev_whole(dev)->bd_inode->i_mapping;
unsigned char *res = NULL;
struct page *page;
struct folio *folio;
page = read_mapping_page(mapping, 0, NULL);
if (IS_ERR(page))
folio = read_mapping_folio(mapping, 0, NULL);
if (IS_ERR(folio))
return NULL;
if (!PageError(page))
res = kmemdup(page_address(page) + 0x1be, 66, GFP_KERNEL);
put_page(page);
res = kmemdup(folio_address(folio) + 0x1be, 66, GFP_KERNEL);
folio_put(folio);
return res;
}
EXPORT_SYMBOL(scsi_bios_ptable);