f0f35fdac1
This reverts commit d7f21940bc.
Winbond W25Q256FV and W25Q256JV both uses 0xef4019 as JEDEC ID,
but only the latter has proper 4B_OPCODES support.
W25Q256FV has all 4B read instructions but it lacks a 4B page program
instruction, causing the entire flash to be read-only.
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
23 lines
647 B
Diff
23 lines
647 B
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Thu, 22 Feb 2018 11:11:57 +0100
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Subject: [PATCH] mtd: spi-nor: allow NOR driver to write fewer bytes than
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requested
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The write size can be constrained by the maximum message/transfer size
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of the SPI controller. Only check for ret = 0 to avoid an infinite loop.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/drivers/mtd/spi-nor/spi-nor.c
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+++ b/drivers/mtd/spi-nor/spi-nor.c
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@@ -2704,7 +2704,7 @@ static int spi_nor_write(struct mtd_info
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write_enable(nor);
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ret = spi_nor_write_data(nor, addr, page_remain, buf + i);
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- if (ret < 0)
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+ if (ret <= 0)
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goto write_err;
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written = ret;
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