4.4-stable review patch. If anyone has any objections, please let me know.
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From: Tokunori Ikegami ikegami@allied-telesis.co.jp
commit dfeae1073583dc35c33b32150e18b7048bbb37e6 upstream.
For the word write it is checked if the chip has the correct value. But it is not checked for the write buffer as only checked if ready. To make sure for the write buffer change to check the value.
It is enough as this patch is only checking the last written word. Since it is described by data sheets to check the operation status.
Signed-off-by: Tokunori Ikegami ikegami@allied-telesis.co.jp Reviewed-by: Joakim Tjernlund Joakim.Tjernlund@infinera.com Cc: Chris Packham chris.packham@alliedtelesis.co.nz Cc: Brian Norris computersforpeace@gmail.com Cc: David Woodhouse dwmw2@infradead.org Cc: Boris Brezillon boris.brezillon@free-electrons.com Cc: Marek Vasut marek.vasut@gmail.com Cc: Richard Weinberger richard@nod.at Cc: Cyrille Pitchen cyrille.pitchen@wedev4u.fr Cc: linux-mtd@lists.infradead.org Cc: stable@vger.kernel.org Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mtd/chips/cfi_cmdset_0002.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -1878,7 +1878,7 @@ static int __xipram do_write_buffer(stru if (time_after(jiffies, timeo) && !chip_ready(map, adr)) break;
- if (chip_ready(map, adr)) { + if (chip_good(map, adr, datum)) { xip_enable(map, chip, adr); goto op_done; }