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linux_spi: Reduce maximum read chunksize

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It turned out that older kernels use a single buffer for combined
input and output data. So we have to account for the read command +
max 3 address bytes.

Change-Id: Ide50db38af1004fde09a70b15938e77f5e1285ac
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/25150
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
This commit is contained in:
Nico Huber 2018-03-08 16:14:15 +01:00 committed by Nico Huber
parent e7792e3b83
commit 6b9e934fe5
1 changed files with 1 additions and 1 deletions
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linux_spi.c
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@ -183,7 +183,7 @@ static int linux_spi_read(struct flashctx *flash, uint8_t *buf,
unsigned int start, unsigned int len)
{
return spi_read_chunked(flash, buf, start, len,
(unsigned int)getpagesize());
(unsigned int)getpagesize() - 4);
}
static int linux_spi_write_256(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len)