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[v6,10/10] mtd: m25p80: read in spi_max_transfer_size chunks

Message ID 77973c7d90afb034f3bee55db7bff5be23e2a812.1449052427.git.hramrach@gmail.com
State Superseded
Headers show

Commit Message

Michal Suchanek Dec. 2, 2015, 10:38 a.m. UTC 
Take into account transfer size limitation of SPI master.

Signed-off-by: Michal Suchanek <hramrach@gmail.com>

---

 - update for: return SIZE_MAX when no limit is known
---
 drivers/mtd/devices/m25p80.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 58ecfa4..f36ffc6 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -150,7 +150,7 @@  static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
 
 	t[1].rx_buf = buf;
 	t[1].rx_nbits = m25p80_rx_nbits(nor);
-	t[1].len = len;
+	t[1].len = min_t(size_t, len, spi_max_transfer_size(spi));
 	spi_message_add_tail(&t[1], &m);
 
 	ret = spi_sync(spi, &m);