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scsicam: Fix use of page cache
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>
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@ -34,15 +34,14 @@ unsigned char *scsi_bios_ptable(struct block_device *dev)
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{
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struct address_space *mapping = bdev_whole(dev)->bd_inode->i_mapping;
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unsigned char *res = NULL;
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struct page *page;
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struct folio *folio;
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page = read_mapping_page(mapping, 0, NULL);
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if (IS_ERR(page))
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folio = read_mapping_folio(mapping, 0, NULL);
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if (IS_ERR(folio))
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return NULL;
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if (!PageError(page))
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res = kmemdup(page_address(page) + 0x1be, 66, GFP_KERNEL);
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put_page(page);
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res = kmemdup(folio_address(folio) + 0x1be, 66, GFP_KERNEL);
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folio_put(folio);
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return res;
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}
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EXPORT_SYMBOL(scsi_bios_ptable);
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