linux-kernel - Bug in MTD NAND ONFI chipsize detection

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Date:	Wed, 11 May 2011 11:25:22 -0500
From:	Nitin Garg <nitingarg98@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Bug in MTD NAND ONFI chipsize detection

Hi All,

The nand_flash_detect_onfi function in mtd/nand detects the NAND flash
device size using the ONFI parameters:
	chip->chipsize = (uint64_t)le32_to_cpu(p->blocks_per_lun) * mtd->erasesize;

The lun_count is not taken into consideration due to which we detect
wrong size for Micron MT29F8G08ADADAH4 as it has 2 logical units.

We should change the chipsize calculation to:
	chip->chipsize = (uint64_t)le32_to_cpu(p->blocks_per_lun) *
(uint64_t)le32_to_cpu(p->lun_count) * mtd->erasesize;

Pls suggest.

Regards,
Nitin Garg
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